Monitoring FDDI Performance

Accessing the Monitor Menu

Monitoring FDDI MAC Parameters

Monitoring FDDI Path Parameters

Monitoring FDDI Port Parameters

Monitoring FDDI SMT Parameters

Monitoring FDDI Performance

This chapter describes how to use the console interface of the Cisco Catalyst 1800 Token Ring switch to monitor the performance of the FDDI board. This chapter contains the following sections:

Accessing the Monitor Menu

Type this command from the Main menu:

The Monitor menu appears (see Figure 8-1).

Figure 8-1: Monitor Menu with the FDDI Option


                                        Cisco Systems Catalyst 1800 Token Ring/FDDI Uplink
 
 
                                                       Select From
 
                                                      Bridge
                                                      FDDI
                                                      MAC Addresses                                 
                                                      NetBIOS Names                                
                                                      Physical Ports                                
                                                      Serial Port
                                                      SRT Statistics
                                                      STP Ports
                                                      System                                        
 
 
Catalyst 1800> m

Type f and the FDDI Monitor menu appears (see Figure 8-2).

Figure 8-2: FDDI Monitor Menu


                                     Cisco Systems Catalyst 1800 Token Ring/FDDI Uplink
 
                                                  Select From
 
                                                  MAC
                                                  Path
                                                  Port
                                                  SMT
 
 
 
 
Catalyst 1800> m f

The following table describes the FDDI parameters displayed on the Monitor menu and shows where to find additional information.

Parameter	Displays	For more information, see this section
MAC	Current FDDI MAC statistics for the selected port	"Monitoring FDDI MAC Parameters"
Path	Current FDDI Path statistics for the selected port	"Monitoring FDDI Path Parameters"
Port	Current FDDI Port statistics for the selected port	"Monitoring FDDI Port Parameters"
SMT	Current FDDI SMT statistics for the selected port	"Monitoring FDDI SMT Parameters"

Table 8-1: FDDI Monitor Menu Selections

Parameter Displays For more information, see this section

MAC

Current FDDI MAC statistics for the selected port

"Monitoring FDDI MAC Parameters"

Path

Current FDDI Path statistics for the selected port

"Monitoring FDDI Path Parameters"

Port

Current FDDI Port statistics for the selected port

"Monitoring FDDI Port Parameters"

SMT

Current FDDI SMT statistics for the selected port

"Monitoring FDDI SMT Parameters"

Monitoring FDDI MAC Parameters

The FDDI MAC screen displays MAC-related values.

Type this command from the Main menu:

m f m

The FDDI MAC Configuration and Statistics screen appears (see Figure 8-3).

Figure 8-3: FDDI MAC Configuration and Statistics Screen


                                  Cisco Systems Catalyst 1800 Token Ring/FDDI Uplink
 
                                        FDDI MAC Configuration and Statistics
                                                                              
SMT Address:                 00-05-77-ff-ff-04              Downstream PORT type:   B
MAC Address:                 00-05-77-ff-ff-04              MAC Index:              1
Upstream Neighbor:           00-05-77-ff-ff-04              Dup Address Test:       None
Downstream Neighbor:         00-00-1f-00-00-00              Frame Status Func.:     Repeating
Old Upstream Nbr:            00-00-1f-00-00-00              T-MAX Capability:       1336934400 ns
Old Downstream Nbr:          00-00-1f-00-00-00              TVX Capability:         5222400 ns
T-Req:                       4014080 ns                     T-Neg:                  4014080 ns
T-Max:                       167772160 ns                   TVX Value:              2621440 ns
Frame Count:                 890                            Copied Count:           0
Transmit Count:              443                            Error Count:            0
Lost Count:                  0                              Frame Err Threshold:    0
Frame Err Ratio:             0                              RMT State:              RING_OP
DA Flag:                     False                          UNDA Flag:              False
Frame Error Flag:            False                          MA Unit Data Avail:     True
Hardware Present:            PRESENT                        MA Unit Data Enable:    True
Current Path:                Primary                        Available Paths:        Primary
Requested Paths:             L0,SA,PA                                                             
 
		
Catalyst 1800>m f m

The following table describes the parameters displayed on the FDDI MAC Configuration and Statistics screen.

Title	Description
SMT Address	The 48-bit individual MAC address used for SMT frames. This address is the same as the MAC address in non-cannonical format (MSB).
MAC Address	The end station MAC address for this port
Upstream Neighbor	The long individual MAC address of the most recently known upstream neighbor. It has an initial value of the SMT-Unknown-MAC Address parameter and is updated when the upstream neighbor becomes available (that is, inserted in the ring). The SMT_Unknown_Mac address is defined as 00-00-1F-00-00-00.
Downstream Neighbor	The long individual MAC address of the most recently known downstream neighbor. It has an initial value of the SMT- Unknown-MAC Address and is updated when the downstream neighbor becomes available (that is, inserted in the ring).
Old Upstream Nbr	The previously known value of the upstream neighbor's long individual MAC address
Old Downstream Nbr	The previously known value of the downstream neighbor's long individual MAC address
T-Req	The station's desired target token rotation time (TTRT), in nanoseconds, for this station's synchronous traffic. The TTRT is the time limit within which the station expects to receive and use the token. The TTRT for the ring is determined at ring initialization when each station declares what it wants the TTRT to be (also known as bidding). The value each station declares is the T-Req for that station. The lowest value is chosen as the TTRT for the ring.
T-Max	The maximum TTRT, in nanoseconds, that this station supports
Frame Count	The number of frames received by the MAC address
Transmit Count	The number of frames transmitted by this station. Note that this count does not include MAC frames.
Lost Count	The number of instances that this port detected a format error during frame reception
Frame Err Ratio	The ratio of lost count plus error count over frame count plus lost count
DA Flag	Duplicate address flag. If set to True, it indicates that the MAC address under control has the same address as another one on the FDDI ring. If set to False, it indicates that the MAC address has a unique address on the FDDI ring. This is normal in a working ring.
Frame Error Flag	When set to True, this flag indicates that a MAC frame error condition is present. This flag is set to False (clear) upon station initialization. The default is False.
Hardware Present	Indicates the presence of underlying hardware support for the MAC address. It can either be True or False. The default is True.
Current Path	Indicates the path into which this MAC address is currently inserted. Valid values are:
	Value	Meaning
Isolated	The MAC address is not inserted in any path.
Local	The MAC address is inserted in the local path.
Secondary	The MAC address is inserted in the secondary path.
Primary	The MAC address is inserted in the primary path.
Requested Paths	List of permitted Paths that specifies the path(s) into which the MAC address can be inserted. Valid values are:
	Path Type	Meaning
LO	Local
SA	Secondary-Alternate
PA	Primary-Alternate
CA	Concatenated-Alternate
SP	Secondary-Preferred
PP	Primary-Preferred
CP	Concatenated-Preferred
TH	Thru
The Default values enabled are LO, SA, and PA.
Down Stream Port Type	Indicates the PC-Type of the first port that is downstream of this MAC address (the exit port). Valid values are:
	Function	Meaning
A	The port in a dual-attached station or concentrator that attaches to the primary in and secondary out when attaching to the dual ring
B	The port in a dual-attached station or concentrator that attaches to the secondary in and the primary out when attaching to the dual ring
S	One port in a single attachment station shall be designated S. One port in a single attachment concentrator shall be designated S.
M	A port in a concentrator that serves as a master to a connected station or concentrator
None	No PC-Type
MAC index	An index variable for uniquely identifying the MAC address. In the Catalyst 1800 FDU, there is only one FDDI MAC address; therefore, the value is always set to 1.
Dup Address Test	A variable that indicates the current status of the duplicate address detection function. Valid values are:
	Value	Meaning
None	The duplicate address test has not been completed.
Pass	The duplicate address test has completed without detecting a duplicate address.
Fail	The duplicate address test has detected a duplicate address.
Frame Status Func	Indicates the MAC address's optional frame status processing function (such as receive frame status). Valid values are:
	Function	Meaning
Repeating	Repeats the transmission of the input symbol stream
Setting	Sets the frame status flag
Clearing	Clears the frame status flag
T-MAX Capability	Indicates the maximum T-Max, in nanoseconds, that this station supports
TVX Capability	Indicates the maximum time value, in nanoseconds, of the valid transmission timer (TVX) that this station supports
T-Neg	The negotiated TTRT, in nanoseconds, for all systems on the ring. This value is determined at ring initialization.
TVX Value	The maximum allowable time, in nanoseconds, between valid transmissions. The station uses this value to recover from any error conditions.
Copied Count	The number of frames copied from the ring to this station
Error Count	The number of frames detected in error by this port
Frame Err Threshold	A threshold for determining when a MAC condition report should be generated
RMT State	Indicates the current state of the RMT state machine. The RMT receives status information from the port and the ECM, PCM, and CFM, and reports the status of the port. It also provides notification when the port is available for transmission. Valid values are:
	Function	Meaning
Isolated	The initial state of the RMT state machine. The ports are not inserted into any path.
Non_Op	The ring is not working because the MAC address is participating in ring recovery.
Ring_Op	The MAC address is part of a working ring.
Detect	The RMT detects conditions preventing the ring from working.
Non_Op_Dup	The RMT has received indications that the MAC address is a duplicate of another MAC address on the ring. The ring is not working.
Ring_Op_Dup	The RMT has received indications that the MAC is a duplicate of another MAC address on the ring. The ring is working.
Directed	The RMT has instructed this MAC address to send beacon frames notifying the ring of the stuck condition.
UNDA Flag	Upstream neighbor duplicate address flag. If set to True, it indicates the upstream neighbor has reported a duplicate address condition. This flag is cleared (set to False) when the condition clears.
MA Unit Data Avail	A flag from the RMT indicating the port is available for frame transmission
MA Unit Data Enable	A flag to RMT indicating the port is enabled and will be available when the ring is working. This flag controls access of high-level protocols to the frame transmission and reception services of the port. When the MA Unit Data Enable flag is set to True, higher level protocols are allowed to transmit and receive frames.
Available Paths	Indicates the paths available for this port. Valid values are Primary, Secondary, and Local.

Table 8-2: Monitor FDDI MAC Configuration and Statistics Screen

Title Description

SMT Address

The 48-bit individual MAC address used for SMT frames. This address is the same as the MAC address in non-cannonical format (MSB).

MAC Address

The end station MAC address for this port

Upstream Neighbor

The long individual MAC address of the most recently known upstream neighbor. It has an initial value of the SMT-Unknown-MAC Address parameter and is updated when the upstream neighbor becomes available (that is, inserted in the ring).

The SMT_Unknown_Mac address is defined as 00-00-1F-00-00-00.

Downstream Neighbor

The long individual MAC address of the most recently known downstream neighbor. It has an initial value of the SMT- Unknown-MAC Address and is updated when the downstream neighbor becomes available (that is, inserted in the ring).

Old Upstream Nbr

The previously known value of the upstream neighbor's long individual MAC address

Old Downstream Nbr

The previously known value of the downstream neighbor's long individual MAC address

T-Req

The station's desired target token rotation time (TTRT), in nanoseconds, for this station's synchronous traffic. The TTRT is the time limit within which the station expects to receive and use the token. The TTRT for the ring is determined at ring initialization when each station declares what it wants the TTRT to be (also known as bidding). The value each station declares is the T-Req for that station. The lowest value is chosen as the TTRT for the ring.

T-Max

The maximum TTRT, in nanoseconds, that this station supports

Frame Count

The number of frames received by the MAC address

Transmit Count

The number of frames transmitted by this station. Note that this count does not include MAC frames.

Lost Count

The number of instances that this port detected a format error during frame reception

Frame Err Ratio

The ratio of lost count plus error count over frame count plus lost count

DA Flag

Duplicate address flag. If set to True, it indicates that the MAC address under control has the same address as another one on the FDDI ring.

If set to False, it indicates that the MAC address has a unique address on the FDDI ring. This is normal in a working ring.

Frame Error Flag

When set to True, this flag indicates that a MAC frame error condition is present.

This flag is set to False (clear) upon station initialization.

The default is False.

Hardware Present

Indicates the presence of underlying hardware support for the MAC address. It can either be True or False.

The default is True.

Current Path

Indicates the path into which this MAC address is currently inserted. Valid values are:

Value

Meaning

Isolated

The MAC address is not inserted in any path.

Local

The MAC address is inserted in the local path.

Secondary

The MAC address is inserted in the secondary path.

Primary

The MAC address is inserted in the primary path.

Requested Paths

List of permitted Paths that specifies the path(s) into which the MAC address can be inserted. Valid values are:

Path Type Meaning

LO

Local

SA

Secondary-Alternate

PA

Primary-Alternate

CA

Concatenated-Alternate

SP

Secondary-Preferred

PP

Primary-Preferred

CP

Concatenated-Preferred

TH

Thru

The Default values enabled are LO, SA, and PA.

Down Stream Port Type

Indicates the PC-Type of the first port that is downstream of this MAC address (the exit port). Valid values are:

Function Meaning

A

The port in a dual-attached station or concentrator that attaches to the primary in and secondary out when attaching to the dual ring

B

The port in a dual-attached station or concentrator that attaches to the secondary in and the primary out when attaching to the dual ring

S

One port in a single attachment station shall be designated S. One port in a single attachment concentrator shall be designated S.

M

A port in a concentrator that serves as a master to a connected station or concentrator

None

No PC-Type

MAC index

An index variable for uniquely identifying the MAC address. In the Catalyst 1800 FDU, there is only one FDDI MAC address; therefore, the value is always set to 1.

Dup Address Test

A variable that indicates the current status of the duplicate address detection function. Valid values are:

Value Meaning

None

The duplicate address test has not been completed.

Pass

The duplicate address test has completed without detecting a duplicate address.

Fail

The duplicate address test has detected a duplicate address.

Frame Status Func

Indicates the MAC address's optional frame status processing function (such as receive frame status). Valid values are:

Function Meaning

Repeating

Repeats the transmission of the input symbol stream

Setting

Sets the frame status flag

Clearing

Clears the frame status flag

T-MAX Capability

Indicates the maximum T-Max, in nanoseconds, that this station supports

TVX Capability

Indicates the maximum time value, in nanoseconds, of the valid transmission timer (TVX) that this station supports

T-Neg

The negotiated TTRT, in nanoseconds, for all systems on the ring. This value is determined at ring initialization.

TVX Value

The maximum allowable time, in nanoseconds, between valid transmissions. The station uses this value to recover from any error conditions.

Copied Count

The number of frames copied from the ring to this station

Error Count

The number of frames detected in error by this port

Frame Err Threshold

A threshold for determining when a MAC condition report should be generated

RMT State

Indicates the current state of the RMT state machine. The RMT receives status information from the port and the ECM, PCM, and CFM, and reports the status of the port. It also provides notification when the port is available for transmission. Valid values are:

Function Meaning

Isolated

The initial state of the RMT state machine. The ports are not inserted into any path.

Non_Op

The ring is not working because the MAC address is participating in ring recovery.

Ring_Op

The MAC address is part of a working ring.

Detect

The RMT detects conditions preventing the ring from working.

Non_Op_Dup

The RMT has received indications that the MAC address is a duplicate of another MAC address on the ring. The ring is not working.

Ring_Op_Dup

The RMT has received indications that the MAC is a duplicate of another MAC address on the ring. The ring is working.

Directed

The RMT has instructed this MAC address to send beacon frames notifying the ring of the stuck condition.

UNDA Flag

Upstream neighbor duplicate address flag. If set to True, it indicates the upstream neighbor has reported a duplicate address condition. This flag is cleared (set to False) when the condition clears.

MA Unit Data Avail

A flag from the RMT indicating the port is available for frame transmission

MA Unit Data Enable

A flag to RMT indicating the port is enabled and will be available when the ring is working. This flag controls access of high-level protocols to the frame transmission and reception services of the port. When the MA Unit Data Enable flag is set to True, higher level protocols are allowed to transmit and receive frames.

Available Paths

Indicates the paths available for this port. Valid values are Primary, Secondary, and Local.

Monitoring FDDI Path Parameters

The FDDI PATH Configuration and Statistics screen displays path-related values.

Type this command from the Main menu:

m f pa

The FDDI PATH Configuration and Statistics screen appears (see Figure 8-4).

Figure 8-4: FDDI PATH Configuration and Statistics Screen


                                    Cisco Systems Catalyst 1800 Token Ring/FDDI Uplink 
 
 
                                          FDDI PATH Configuration and Statistics
 
 
    Path Type:            Primary                               Trace Status:          None
    TVX Lower Bound:      2500000 nsc                           Max Lower Bound:       165000000 ns
    Max T Req:            165000000 ns                          Config Resource Type:  MAC
    Config Current Path:  Primary
 
    Path Type:            Secondary                             Trace Status:          None
    TVX Lower Bound:      2500000 ns                            Max Lower Bound:       165000000 ns
    Max T Req:            165000000 ns                          Config Resource Type:  PORT
    Config Current Path:  Secondary
 
 
 
Catalyst 1800> m f pa

The following table describes the parameters displayed on the FDDI PATH Configuration and Statistics screen.

Title	Description
Path Type	Indicates one of the following path types for this MAC address: primary, secondary, or local.
TVX Lower Bound	The maximum available time, in nanoseconds, between valid transmission times. The station uses this value to recover from any ring error condition.
Max T Req	Specifies the maximum time value of the requested TTRT, in nanoseconds, that this station supports. The default value is 165,000,00 nsec.
Config Current Path	The current insertion status for this resource on this path. The available path types are: Isolated Local Secondary Primary Concatenated Thru
Trace Status	The status of the recovery mechanism for stuck beacon conditions on the FDDI ring. The available values are the following:
	Status Type	Meaning
None	The trace is inactive.
Trace_Initiated	The trace has been initiated, generating a PC_Trace signal.
Trace_Propagated	The trace will be propagated upstream.
Trace_Terminated	The trace was propagated upstream and is now terminated.
Max Lower Bound	The minimum time value of the maximum TTRT, in nanoseconds, that this station supports. The default is 165,000,000 nsec.
Config Resource Type	The type of resource associated with this configuration. Available resource types are MAC Port

Table 8-3: FDDI Path Configuration and Statistics Parameters

Title Description

Path Type

Indicates one of the following path types for this MAC address: primary, secondary, or local.

TVX Lower Bound

The maximum available time, in nanoseconds, between valid transmission times. The station uses this value to recover from any ring error condition.

Max T Req

Specifies the maximum time value of the requested TTRT, in nanoseconds, that this station supports.

The default value is 165,000,00 nsec.

Config Current Path

The current insertion status for this resource on this path. The available path types are:

Isolated

Local

Secondary

Primary

Concatenated

Thru

Trace Status

The status of the recovery mechanism for stuck beacon conditions on the FDDI ring. The available values are the following:

Status Type Meaning

None

The trace is inactive.

Trace_Initiated

The trace has been initiated, generating a PC_Trace signal.

Trace_Propagated

The trace will be propagated upstream.

Trace_Terminated

The trace was propagated upstream and is now terminated.

Max Lower Bound

The minimum time value of the maximum TTRT, in nanoseconds, that this station supports.

The default is 165,000,000 nsec.

Config Resource Type

The type of resource associated with this configuration. Available resource types are

MAC

Port

Monitoring FDDI Port Parameters

The FDDI PORT Configuration and Statistics screen displays port-related values.

Step 1 Type this command from the Main menu:

Monitor FDDI  Port

The system responds:

Enter A or B for port

Step 2 Type A and press Return.

Note

The FDDI PORT Configuration and Statistics screen for Port A appears (see Figure 8-5).

Figure 8-5: FDDI PORT Configuration & Statistics Screen


                                    Cisco Systems Catalyst 1800 Token Ring/FDDI Uplink 
 
 
                                          FDDI PORT Configuration and Statistics
 
MyType:               A                                                     NeighborType:None
PMD Class:            Multimode                                             MAC Placement Index:0
BS Flag:              False                                                 LCT Fail Count:0
LER Estimate:         9                                                     Lem Reject Count:0
Lem Count:            0                                                     LER Cutoff:7
LER Alarm:            8                                                     Connect State:Connecting
PCM State:            Break                                                 PC Withhold:None
LER Flag:             False                                                 Hardware Present:True
Conn Capabilities:    None                                                  CurrentPath:Isolated
Available Paths:      Primary, Secondary
Requested Paths:
           *None:LO
           *Tree:LO,CA,PP
           *Peer:LO,CA,PP,TH
Connection Policies:None
 
 
 
Catalyst 1800> Monitor FDDI Port A

The following table describes the parameters displayed on the FDDI Port Configuration screen.

Parameter	Description
MyType	A variable that specifies the type of port connector on the port being managed by the PCM (Physical Connection Management). The four different port connector types are:
	Function	Meaning
A	The port in a dual-attached station or concentrator that attaches to the Primary In and Secondary Out when attaching to the dual ring
B	The port in a dual-attached station or concentrator that attaches to the Secondary In and the Primary Out when attaching to the dual ring
S	One port in a single attachment station or concentrator must be designated S.
M	A port in a concentrator that serves as a Master to a connected station or concentrator. Note that My Type only supports A, B, S, and None as connector types (that is, M is not supported).
PMD Class	Indicates the type of physical media dependent (PMD) entity associated with this port. Valid values are Multimode Single-Mode1 Single-Mode2 Sonet Low-Cost-Fiber Twisted-Pair Unknown Unspecified
BS Flag	The value of the Break Status (BS) flag. A BS flag is used to indicate that the PCM state machine is not leaving the Break State in an expected time interval; therefore, there may be a problem.
LER Estimate	The link error rate estimate. The LER specifies the number of link errors that occur in a given time interval. (A link error is a problem with the station's connection to the ring.) The LER estimate is a long-term average link error rate. It ranges from 10^-4 to 10^-15 and is reported as the absolute value of the base 10 logarithm.
LEM Counts	The total Link Error Monitor error count. Upon station initialization, it is set to 0.
LER Alarm	The Link Error Rate at which a link connection exceeds a preset alarm threshold. It ranges from 10^-4 to 10^-15 and is reported as the absolute value of the base 10 logarithm. For example, when LER Alarm is set to 10^-8, it is reported as 8.
PCM State	The Physical Connection Management (PCM) initializes the connection of neighboring ports and manages the signaling between ports. PCM provides all the necessary signaling to: Initialize a connection Withhold a marginal connection Support maintenance PCM state machines can have the following states:
	State	Meaning
Off	Indicates the initial state of the PCM state machine
Break	Indicates the entry point in the start of a PCM connection
Trace	Localizes a stuck beacon condition
Connect	Synchronizes the ends of the connection for the signaling sequence
Next	Separates the signaling performed and the to transmit PDUs while the MAC local loop is performed
Signal	Is entered from the Next state when a bit is ready to be transmitted
LER Flag	The condition becomes active when the value of LER Estimate is less than or equal to that of LER Alarm. It is then reported with the status reporting frames (SRF).
Conn Capabilities	A value that indicates the connection capabilities of the port. Valid values are.
	Value	Meaning
None	There is no connection policy.
LCT	The link confidence test. The MAC address is used to run the link confidence test to determine if the test passed or failed.
Loop	The local loop test. Run this test before a connection is made active to determine if the test passed or failed.
The default value is None.
Available Paths	Indicates the paths available to this port. In the absence of hardware faults, the A and B ports always have both the primary and secondary paths available. The following values are available: Primary, Secondary, and Local.
Requested Paths	A list of permitted paths where each list element defines the port's permitted paths. Valid values are
Connection Policies	A value representing the port's connection policies desired in the node. Valid values are:
	Policy	Meaning
LCT	Link Confidence Test
Loop	Loop
None	No policies
NeighborType	Specifies the type of port connector at the other end of the physical connection. The Neighbor port type connected to MyType. Valid values are A B S M None
MAC Placement Index	Indicates the MAC address, if any, whose transmit path exits the station via this port. The value is 0 if there is no MAC address associated with the port. The MAC Placement Index ranges from 1 to n. In this FDU environment there is only one MAC address. The MAC Placement Index is 0 for port A and 1 for port B.
LCT Fail Counts	The number of consecutive times the link confidence test (LCT) has failed during connection management
LEM Reject Counts	The number of times a link has been rejected
LER Cutoff	The link error rate estimate at which a link connection will be broken. It ranges from 10^-4 to 10^-15 and is reported as the absolute value of the base 10 logarithm. For example, when LER Cutoff is set to 10^-7, it is reported as 7.
Connect State	A variable from this port's PCM to other management entities (such as CFM) indicating the state of the connection. Valid values are Disabled Connecting Standby Active
PC Withhold	A variable from this port's PCM to other management entities containing the reason for withholding a connection. Valid values are:
	State	Meaning
None	No reason given
M-M	Connection is between two M ports.
Otherincompatible	The other ring is incompatible.
Pathnotavailable	The path is not available.
Hardware Present	Indicates the presence of underlying hardware support for the MAC address. It can either be True or False. The default is True.
CurrentPath	Indicates the path(s) into which this port is currently inserted. Valid values are:
	Path Value	Meaning
Isolated	The port is not inserted into any path.
Local	The port is inserted into the local path.
Secondary	The port is inserted into the secondary path.
Concatenated	The port is inserted into both the primary and secondary paths in a concatenated wrap configuration.
Primary	The port is inserted into the primary path.
Thru	The port is inserted into both the primary and secondary paths in a thru configuration.

Table 8-4: FDDI Port Configuration & Statistics

Parameter Description

MyType

A variable that specifies the type of port connector on the port being managed by the PCM (Physical Connection Management). The four different port connector types are:

Function Meaning

A

The port in a dual-attached station or concentrator that attaches to the Primary In and Secondary Out when attaching to the dual ring

B

The port in a dual-attached station or concentrator that attaches to the Secondary In and the Primary Out when attaching to the dual ring

S

One port in a single attachment station or concentrator must be designated S.

M

A port in a concentrator that serves as a Master to a connected station or concentrator. Note that My Type only supports A, B, S, and None as connector types (that is, M is not supported).

PMD Class

Indicates the type of physical media dependent (PMD) entity associated with this port. Valid values are

Multimode

Single-Mode1

Single-Mode2

Sonet

Low-Cost-Fiber

Twisted-Pair

Unknown

Unspecified

BS Flag

The value of the Break Status (BS) flag. A BS flag is used to indicate that the PCM state machine is not leaving the Break State in an expected time interval; therefore, there may be a problem.

LER Estimate

The link error rate estimate. The LER specifies the number of link errors that occur in a given time interval. (A link error is a problem with the station's connection to the ring.) The LER estimate is a long-term average link error rate. It ranges from 10^-4 to 10^-15 and is reported as the absolute value of the base 10 logarithm.

LEM Counts

The total Link Error Monitor error count. Upon station initialization, it is set to 0.

LER Alarm

The Link Error Rate at which a link connection exceeds a preset alarm threshold. It ranges from 10^-4 to 10^-15 and is reported as the absolute value of the base 10 logarithm.

For example, when LER Alarm is set to 10^-8, it is reported as 8.

PCM State

The Physical Connection Management (PCM) initializes the connection of neighboring ports and manages the signaling between ports. PCM provides all the necessary signaling to:

Initialize a connection

Withhold a marginal connection

Support maintenance

PCM state machines can have the following states:

State Meaning

Off

Indicates the initial state of the PCM state machine

Break

Indicates the entry point in the start of a PCM connection

Trace

Localizes a stuck beacon condition

Connect

Synchronizes the ends of the connection for the signaling sequence

Next

Separates the signaling performed and the to transmit PDUs while the MAC local loop is performed

Signal

Is entered from the Next state when a bit is ready to be transmitted

LER Flag

The condition becomes active when the value of LER Estimate is less than or equal to that of LER Alarm. It is then reported with the status reporting frames (SRF).

Conn Capabilities

A value that indicates the connection capabilities of the port. Valid values are.

Value Meaning

None

There is no connection policy.

LCT

The link confidence test. The MAC address is used to run the link confidence test to determine if the test passed or failed.

Loop

The local loop test. Run this test before a connection is made active to determine if the test passed or failed.

The default value is None.

Available Paths

Indicates the paths available to this port. In the absence of hardware faults, the A and B ports always have both the primary and secondary paths available.

The following values are available: Primary, Secondary, and Local.

Requested Paths

A list of permitted paths where each list element defines the port's permitted paths. Valid values are

Connection Policies

A value representing the port's connection policies desired in the node. Valid values are:

Policy Meaning

LCT

Link Confidence Test

Loop

Loop

None

No policies

NeighborType

Specifies the type of port connector at the other end of the physical connection. The Neighbor port type connected to MyType. Valid values are

A

B

S

M

None

MAC Placement Index

Indicates the MAC address, if any, whose transmit path exits the station via this port. The value is 0 if there is no MAC address associated with the port. The MAC Placement Index ranges from 1 to n. In this FDU environment there is only one MAC address.

The MAC Placement Index is 0 for port A and 1 for port B.

LCT Fail Counts

The number of consecutive times the link confidence test (LCT) has failed during connection management

LEM Reject Counts

The number of times a link has been rejected

LER Cutoff

The link error rate estimate at which a link connection will be broken. It ranges from 10^-4 to 10^-15 and is reported as the absolute value of the base 10 logarithm.

For example, when LER Cutoff is set to 10^-7, it is reported as 7.

Connect State

A variable from this port's PCM to other management entities (such as CFM) indicating the state of the connection. Valid values are

Disabled

Connecting

Standby

Active

PC Withhold

A variable from this port's PCM to other management entities containing the reason for withholding a connection. Valid values are:

State Meaning

None

No reason given

M-M

Connection is between two M ports.

Otherincompatible

The other ring is incompatible.

Pathnotavailable

The path is not available.

Hardware Present

Indicates the presence of underlying hardware support for the MAC address. It can either be True or False.

The default is True.

CurrentPath

Indicates the path(s) into which this port is currently inserted. Valid values are:

Path Value Meaning

Isolated

The port is not inserted into any path.

Local

The port is inserted into the local path.

Secondary

The port is inserted into the secondary path.

Concatenated

The port is inserted into both the primary and secondary paths in a concatenated wrap configuration.

Primary

The port is inserted into the primary path.

Thru

The port is inserted into both the primary and secondary paths in a thru configuration.

Monitoring FDDI SMT Parameters

The FDDI SMT screen displays SMT-related values.

Type this command from the Main menu:

Monitor FDDI SMT

The FDDI SMT Configuration and Statistics screen appears (see Figure 8-6).

Figure 8-6: FDDI SMT Configuration and Statistics Screen


                                  Cisco Systems Catalyst 1800 Token Ring/FDDI Uplink 
 
 
                                       FDDI SMT Configuration and Statistics
 
Station ID:                00-00:00-05-77-ff-ff-06
Highest Version ID:        2                                     Lowest Version ID:     2
MIB Version ID:            1                                     Manufacturer Data:     XDI731
User Data:                 FDDI SMT v7.3                         MAC Count:             1
NonMaster Port Count:      2                                     Master Port Count:     0
T Notify:                  30 sec                                RPT Policy:            True
Trace Max Expiration:      7000 ns                               ByPass Present:        False
ECM State:                 In                                    CFM State:             Isolated
Peer Wrap Flag:            False                                 Remote Disconnect:     False
Station Status:            Concatenated
Available Paths:           Primary, Secondary
Config Capability:         None
Conn Policy(REJECT):       AA,AS,BB,BS,SA,SB,MM
 
 
 
 
Catalyst 1800> Monitor FDDI SMT

The following table describes the parameters displayed on the FDDI SMT Configuration and Statistics screen.

Title	Description
Station ID	Uniquely identifies an FDDI station
Highest Version ID	Indicates the highest version of SMT this station supports
MIB Version ID	Indicates the version of the FDDI MIB of this station. For this version of SMT, the value is 1.
User Data	User-defined information. This variable can contain 32 characters (that is, an ASCII string).
NonMaster Port Count	The number of A, B, and S ports in this station or concentrator
T Notify	The timer, expressed in seconds, used in the SMT Neighbor Notification protocol. The range 2 to 30 seconds. The default value is 30 seconds.
Trace Max Expiration	The maximum propagation time for a trace on an FDDI topology. This parameter places a lower bound on the detection time for a non-recovering ring. The default is 7,000 nsec.
ECM State	Indicates the current state of the entity coordination management (ECM) state machine. The ECM controls the optical bypass switch of the physical media dependent (PMD) layer and signals the PCM when the media is available. The ECM starts the PCMs for the A and B ports in the station when the optical bypass switching is complete. The following table describes the valid states:
	State	Meaning
Out	Initial state of the ECM state machine
In	Normal state for a completed connection
Trace	Localizes a stuck beacon condition
Leave	Allows sufficient time to break any existing conditions
Path_Test	Entered upon the completion of the Trace function
Insert	Allows the switching time of the optical bypass switch
Check	Confirms that both the primary and secondary optical bypass switches have switched
Peer Wrap Flag	A variable set to True when the CFM state is in any wrap state (for example, wrap_a)
Station Status	The status obtained from the CFM entity. The status can be one of the following:
	Value	Status
Concatenated	Obtained when the CFM state is set to c_wrap_a, c_wrap_b, or c_wrap_s
Thru	Obtained when both ports A and B of this station are respectively connected to ports B and A of an adjacent station
Separated	Obtained when both ports A and B are not connected
Available Paths	A value that indicates the Path types available in the station. The following is a list of allowable values: Primary Secondary Local
Config Capability	A value indicating the configuration capabilities of a node. When displayed as CF-Wrap-AB, it indicates that the station can perform a wrap_ab.
Conn Policy (REJECT)	A value representing the rejection connection policies in effect in a particular PC node type. The following is a list of allowable values:
	Policy	Rule
AA	Reject A-A
AB	Reject A-B
AS	Reject A-S
AM	Reject A-M
BA	Reject B-A
BB	Reject B-B
BS	Reject B-S
BM	Reject B-M
SA	Reject S-A
SB	Reject S-B
SS	Reject S-S
SM	Reject S-M
MA	Reject M-A
MB	Reject M-B
MS	Reject M-S
MM	Reject M-M
Lowest Version ID	Indicates the lowest version of SMT this station supports
Manufacturer Data	The manufacturer-defined information. This value contains up to 32 characters and cannot be changed by the user.
MAC Count	The number of MAC addresses in this station or concentrator
Master Port Count	The number of M Ports in a node. If the node is not a concentrator, the value is 0.
RPT Policy	Status report policy. This parameter is used to control the generation of status reporting frames (SRF) when this station experiences a change in status. When set to True, an SRF is generated, indicating a status change. When set to False, no SRF is generated.
Bypass Present	A flag indicating whether the station has a bypass on its AB port pair. Valid values are True and False.
CFM State
Value	State
isolated	The port is not inserted into any path.
local_a	The A port is inserted into a local path.
local_b	The B port is inserted into a local path.
local_ab	The A and B ports are inserted into a local path.
local_s	The S port is inserted into a local path.
wrap_a	The secondary path is wrapped to the A port.
wrap_b	The primary path is wrapped to the B port.
wrap_ab	The primary path is wrapped to the B port; the secondary path is wrapped to the A port.
wrap_s	The primary path is wrapped to the S port.
c_wrap_a	The primary and secondary paths are joined internally to the station and wrapped to the A port.
c_wrap_b	The primary and secondary paths are joined internally to the station.
Remote Disconnect	A flag indicating that the station was remotely disconnected from the network because it received an SMT disconnect message. To rejoin the network, this station must receive an SMT connect message. The value can be T (true) or F (false).

Table 8-5: FDDI SMT Configuration and Statistics Parameters

Title Description

Station ID

Uniquely identifies an FDDI station

Highest Version ID

Indicates the highest version of SMT this station supports

MIB Version ID

Indicates the version of the FDDI MIB of this station. For this version of SMT, the value is 1.

User Data

User-defined information. This variable can contain 32 characters (that is, an ASCII string).

NonMaster Port Count

The number of A, B, and S ports in this station or concentrator

T Notify

The timer, expressed in seconds, used in the SMT Neighbor Notification protocol. The range 2 to 30 seconds.

The default value is 30 seconds.

Trace Max Expiration

The maximum propagation time for a trace on an FDDI topology. This parameter places a lower bound on the detection time for a non-recovering ring.

The default is 7,000 nsec.

ECM State

Indicates the current state of the entity coordination management (ECM) state machine. The ECM controls the optical bypass switch of the physical media dependent (PMD) layer and signals the PCM when the media is available. The ECM starts the PCMs for the A and B ports in the station when the optical bypass switching is complete.

The following table describes the valid states:

State Meaning

Out

Initial state of the ECM state machine

In

Normal state for a completed connection

Trace

Localizes a stuck beacon condition

Leave

Allows sufficient time to break any existing conditions

Path_Test

Entered upon the completion of the Trace function

Insert

Allows the switching time of the optical bypass switch

Check

Confirms that both the primary and secondary optical bypass switches have switched

Peer Wrap Flag

A variable set to True when the CFM state is in any wrap state (for example, wrap_a)

Station Status

The status obtained from the CFM entity. The status can be one of the following:

Value Status

Concatenated

Obtained when the CFM state is set to c_wrap_a, c_wrap_b, or c_wrap_s

Thru

Obtained when both ports A and B of this station are respectively connected to ports B and A of an adjacent station

Separated

Obtained when both ports A and B are not connected

Available Paths

A value that indicates the Path types available in the station. The following is a list of allowable values:

Primary

Secondary

Local

Config Capability

A value indicating the configuration capabilities of a node. When displayed as CF-Wrap-AB, it indicates that the station can perform a wrap_ab.

Conn Policy (REJECT)

A value representing the rejection connection policies in effect in a particular PC node type. The following is a list of allowable values:

Policy Rule

AA

Reject A-A

AB

Reject A-B

AS

Reject A-S

AM

Reject A-M

BA

Reject B-A

BB

Reject B-B

BS

Reject B-S

BM

Reject B-M

SA

Reject S-A

SB

Reject S-B

SS

Reject S-S

SM

Reject S-M

MA

Reject M-A

MB

Reject M-B

MS

Reject M-S

MM

Reject M-M

Lowest Version ID

Indicates the lowest version of SMT this station supports

Manufacturer Data

The manufacturer-defined information. This value contains up to 32 characters and cannot be changed by the user.

MAC Count

The number of MAC addresses in this station or concentrator

Master Port Count

The number of M Ports in a node. If the node is not a concentrator, the value is 0.

RPT Policy

Status report policy. This parameter is used to control the generation of status reporting frames (SRF) when this station experiences a change in status. When set to True, an SRF is generated, indicating a status change. When set to False, no SRF is generated.

Bypass Present

A flag indicating whether the station has a bypass on its AB port pair.

Valid values are True and False.

CFM State

Value State

isolated

The port is not inserted into any path.

local_a

The A port is inserted into a local path.

local_b

The B port is inserted into a local path.

local_ab

The A and B ports are inserted into a local path.

local_s

The S port is inserted into a local path.

wrap_a

The secondary path is wrapped to the A port.

wrap_b

The primary path is wrapped to the B port.

wrap_ab

The primary path is wrapped to the B port; the secondary path is wrapped to the A port.

wrap_s

The primary path is wrapped to the S port.

c_wrap_a

The primary and secondary paths are joined internally to the station and wrapped to the A port.

c_wrap_b

The primary and secondary paths are joined internally to the station.

Remote Disconnect

A flag indicating that the station was remotely disconnected from the network because it received an SMT disconnect message. To rejoin the network, this station must receive an SMT connect message.

The value can be T (true) or F (false).

Table of Contents

Monitoring FDDI Performance

Accessing the Monitor Menu

Monitoring FDDI MAC Parameters

Monitoring FDDI Path Parameters

Monitoring FDDI Port Parameters

Monitoring FDDI SMT Parameters