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Cisco Bug: CSCvv90195 - SF-F: No. of MAC entries programmed in SDK could be larger than 131k

Last Modified

Oct 12, 2020

Products (1)

  • Cisco 8000 Series Routers

Known Affected Releases

7.3.1.BASE

Description (partial)

Release-note

Symptom:
The number of MACs programmed into HW can go above the allowed system limit (132k) and fluctuate up/down for a period of time if/when the system is being over-driven with unique MACs above the limit.  This condition is self-correcting as long as the offending traffic is stopped, however, there could be unknown side-effects if the limit is exceeded by a very large value (>10k MACs) for a continuing period of time.
Note: The problem will be worse if the MACs are being learned on a Bundle Port.

Conditions:
If the number of unique MACs being sent into a single Bridge Port and/or Bridge Domain is above the system limit (132k).  You should see one or more of the following syslogs:
RP/0/RP0/CPU0:2020 Aug 10 09:35:18.462 EDT: l2vpn_mgr[1170]: %L2-L2VPN-6-MAC_LIMIT_AC_SET : Number of MAC addresses in AC 'Te0/0/0/0/0.1' has reached the configured MAC limit maximum, No action taken
RP/0/RP0/CPU0:2020 Aug 10 09:35:18.462 EDT: l2vpn_mgr[1170]: %L2-L2VPN-6-MAC_LIMIT_BD_SET : Number of MAC addresses in bridge-domain 'bd1' has reached the configured MAC limit maximum, No action taken
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