We are running v2.2.1 in our pair of FWSM's configured as Active/Standby pair. We have a PERL script polling once a minute the OID's 1.3.6.1.4.1.9.9.147.1.2.1.1.1.3.6 and
1.3.6.1.4.1.9.9.147.1.2.1.1.1.3.7
in both FWSM's. These OID's are from CISCO-FIREWALL-MIB and represents the status of each firewall (Active/Standby/Down...).
All seems to work properly, but once a day (sometimes twice) the Active firewall reports the values (Active/Down), i.e. Active for the primary and Down for the secondary, and at the same time, the Standby firewall reports (Active/Standby), i.e. Active for the primary and Standby for the secondary. On the other hand, no message appears in the syslog about any switchover between both FWSM's. Which could be the cause of this problem (the MIB shows a Down value when it should offer a Standby value).