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Cisco Bug: CSCul00624 - ASA: ARP Fails for Subinterface Allocated to Multiple Contexts on Gi0/6

Last Modified

Apr 16, 2020

Products (1)

  • Cisco ASA 5500-X Series Firewalls

Known Affected Releases

8.6(1) 9.0(1) 9.1(2) 9.1(3)

Description (partial)

Symptom:
When running an ASA5500-X platform in multicontext mode and allocating a subinterface of Gigabit0/6 to more than 15 contexts, the context that is utilizing the last MAC address listed in the RX Address Array in the output of "show controller" in the Gi0/6 section will not have any L2 connectivity to hosts on its own subnet.

Conditions:
1.  Must be running the ASA5500-X platform in multi-context mode
2.  Must have more than 15 subinterfaces of Gigabit0/6 allocated to individual contexts or have multiple subinterfaces allocated to contexts such that the total number of allocated subinterfaces is greater than 15.
(Example:  Gi0/6.1 and Gi0/6.2 each allocated to 8 contexts would produce this issue and the last Gi0/6.2 interface to be allocated and configured with a nameif would experience the issue).

3.  Issue has been seen on 8.6.x, 9.0.x, and 9.1.x versions.
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Bug Details Include

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