Reference Guide

950 | SONET/SDH
www.dell.com | support.dell.com
SONET Port Recovery Mechanism
This feature automatically clears a condition that could cause a SONET port to hang, and stop sending and
receiving data. When enabled, FTOS continuously polls status registers on SONET line cards. A port hang
is declared when backpressure is detected on the port, and the port is brought down and then back up to
clear the condition.The default detection interval is 60 seconds.
To keep a port in shutdown use the use the
hardware monitor mac action-on-error port-shutdown
command.
SONET MIB
Table 52-3, "SONET MIB: Managed Objects," in SONET/SDH lists the managed objects supported in the
SONET MIB, as defined in RFC 2558.
Task Command Syntax Command Mode
Implement a detection interval to find and
recover hung SONET ports
sonet-port-recover detection-interval
interval (16-500 seconds; default is 60
seconds)
INTERFACE
Table 52-3. SONET MIB: Managed Objects
SONET Managed Object Description
sonetMediumType Sonet or SDH depending on the configuration
sonetMediumTimeElapsed Time in seconds (up to 900 seconds) since the line card is up. Resets after 900
seconds has elapsed
sonetMediumValidIntervals The number of previous intervals for which valid data has been stored.
sonetMediumLineCoding This variable describes the line coding for this interface—Non-Return to Zero
(NRZ).
sonetMediumCircuitIdentifier This variable contains the transmission vendor's circuit identifier to facilitate
troubleshooting. Note that the circuit identifier, if available, is also represented
by ifPhysAddress.
sonetMediumInvalidIntervals Displays seconds in current 15 minute intervals when data could not be
collected.
sonetMediumLoopbackConfig Displays if loopback is line or internal
sonetSESthresholdSet Displays which recognized set of SES thresholds is supported.