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ModeMismatch Number of differences detected in the local and remote
switching mechanisms (unidirectional or bidirectional modes)
ChanMismatch Number of differences detected between the number
of the channel in the transmitted K1 byte and the number of the channel
in the received K2 byte
PSBF Number of protection switching byte failures detected (no 3
consecutive SONET/SDH frames out of the last 12 contain identical K1
bytes)
FEPLF Number of far-end protection line failures (signal failures
detected on protect interface)
Aps channel Number, interface specifier (in slot/port format), and
protect/working designation of the APS channel for which information is
displayed
aps-protect Identifies the protect interface
aps-working Identifies the working interface
Current Conditions Current state of the interface for this channel
lockedOut Indicates that the router is configured to prevent the protect
interface from taking over if the primary interface fails
SD Indicates that signal degradation is detected
SF Indicates that signal failure is detected
switched Indicates that the router has switched from the working
interface to the protect interface
Counters Statistics for APS channel
SignalDegrades Number of degraded signals detected
SignalFailures Number of failed signals detected
Switchovers Number of times the router has switched from the working
interface to the protect interface
LastSwitchover Length of time that the working interface was active
when the router last switched from the working interface to the protect
interface; a value of Not Applicable indicates that no switchovers have
occurred
Example
host1#show aps group
Aps group bos
Current Conditions: PSBF
Rx(K1/K2): 00/00, No Request on channel 0
Tx(K1/K2): f0/05, Lockout of Protection on channel 0
Counters
ModeMismatch = 0
ChanMismatch = 0
PSBF
= 1
Chapter 3: Configuring Unchannelized OCx/STMx Interfaces
Monitoring SONET/SDH Interfaces
107
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