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Monitoring FDDI Performance

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:

m

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.


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.


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.


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:

The system responds:


Step 2 Type A and press Return.

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.


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

Value Meaning
Peer (P) Neither the port currently under control nor the port at the other end of the connection is of type M (an FDDI concentrator).
Tree (T) A port at one end of the connection is of type M.
None (N) Nothing has been established.

Port A Defaults Port B Defaults
None: LO LO
Tree: LO, CA, SP LO, CA, PP
Peer: LO, CA, SP, TH LO, CA, PP, TH

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.


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).

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