Managing and Troubleshooting the Versalar Switch Router 150007-4 302768-C Rev 00Monitoring APs, TPs, and IFPsThe primary SSP monitors the state of all other processors in the system. In theevent of a hardware or software failure on any of these processors, the SSPattempts to restart or reinitialize the processor. The SSP counts all errors, and if aprocessor 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 intervalFor example, the following excess failure log event would indicate a removal of anaccess card from service:# 6: 03/08/2000 18:04:10.203 DEBUG SLOT 10 MCD Code: 41Slot: 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 fromservice, the SSP attempts failover to a redundant component.SSP to IFP DPI VerificationEach SSP has a point-to-point primary and secondary connection to an IFP, calledthe data path interconnect (DPI). The Versalar 15000 requires a working DPIconnection to allow transmission of data from the SSP to any network connectionother than the management Ethernet interface. Figure 7-1 shows the possiblephysical 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 thesystem and configure the IFP slots, the primary SSP attempts to verify its currentprimary DPI connection. If the primary DPI path is not available, the SSP attemptsto verify its secondary DPI connection.If necessary, the SSP toggles between the primary and secondary DPIconnections. If both paths continue to fail, the SSP allows the secondary SSP slotto take over as long as the secondary SSP slot has a valid DPI connection.
