Cisco Bug: CSCur29855 - ISR4451 Removing Some HSRP Configs Doesn't Clear MAC Filters
Sep 17, 2019
- Cisco 4000 Series Integrated Services Routers
Known Affected Releases
Symptom: Even after removal of certain HSRP configurations, new MAC filters cannot be added. Conditions: Removing most HSRP Group configurations clears the associated mac filters. However, at least one HSRP configuration has been found where unconfiguring does not clear the associated mac filters. In this case a reload is needed to recover. The configuration that causes the problem is when HSRP groups 0-24 are configured on two seperate interfaces i.e. 50 total HSRP groups, but only 25 unique groups. In this case removing all the HSRP configuration leaves the router in a state where adding a single new group causes the console message: Oct 16 13:08:51.191 EDT: %IOSXE_RP_SPA-3-MAC_FILTER_ADD_FAIL: All the available 32 mac filters for module have been consumed. Failed to add 0000.0c07.ac32 for interface GigabitEthernet0/0/0 to be displayed.
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