Monitoring FDDI Performance

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

The end station MAC address for this port

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.

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).

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

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

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.

The maximum TTRT, in nanoseconds, that this station supports

The number of frames received by the MAC address

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

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

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

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.

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.

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:

Requested Paths

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

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:

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:

Frame Status Func

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

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

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

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

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

The number of frames copied from the ring to this station

The number of frames detected in error by this port

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:

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.

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

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.

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

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

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

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

The default value is 165,000,00 nsec.

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:

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

The default is 165,000,000 nsec.

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

• MAC

• Port

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:

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.

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.

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

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:

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.

The default value is None.

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:

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.

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

The number of times a link has been rejected

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.

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:

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:

Uniquely identifies an FDDI station

Indicates the highest version of SMT this station supports

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

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

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

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

The default value is 30 seconds.

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:

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:

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:

Indicates the lowest version of SMT this station supports

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

The number of MAC addresses in this station or concentrator

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

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.

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

Valid values are True and False.

CFM State

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).