Monitoring Aps, Tps, And Ifps; Ssp To Ifp Dpi Verification - Nortel Versalar 15000 Troubleshooting Manual

Managing and Troubleshooting the Versalar Switch Router 15000

Monitoring APs, TPs, and IFPs

The primary SSP monitors the state of all other processors in the system. In the
event of a hardware or software failure on any of these processors, the SSP
attempts to restart or reinitialize the processor. The SSP counts all errors, and if a
processor violates either of the following rules, the SSP removes it from service:
• 5 failures in any 5-minute interval
• 12 failures in any 12-hour interval
For example, the following excess failure log event would indicate a removal of an
access card from service:
# 6: 03/08/2000 18:04:10.203 DEBUG SLOT 10 MCD Code: 41
Slot: 1 removed from service --> excessive failure(s)
(limit: 5, interval: 300 secs)
Note that you must reset the slot, or execute diagnostics on the associated AP, TP,
or IFP cards from the BCC in order to clear the failure status. Upon removal from
service, the SSP attempts failover to a redundant component.

SSP to IFP DPI Verification

Each SSP has a point-to-point primary and secondary connection to an IFP, called
the data path interconnect (DPI). The Versalar 15000 requires a working DPI
connection to allow transmission of data from the SSP to any network connection
other than the management Ethernet interface.
physical connections between the SSP and IFP slots on the Versalar 15000.
Each SSP slot shares a redundant connection to IFP slot 8. When you boot the
system and configure the IFP slots, the primary SSP attempts to verify its current
primary DPI connection. If the primary DPI path is not available, the SSP attempts
to verify its secondary DPI connection.
If necessary, the SSP toggles between the primary and secondary DPI
connections. If both paths continue to fail, the SSP allows the secondary SSP slot
to take over as long as the secondary SSP slot has a valid DPI connection.
7-4
Figure 7-1 shows the possible
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