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Cisco Bug: CSCvv68998 - ISR4000 Statically Configured MAC address of Routed Port-channel Interface 0000.0000.000 upon Reload

Last Modified

Sep 21, 2020

Products (1)

  • Cisco 4000 Series Integrated Services Routers

Known Affected Releases


Description (partial)

>Customer configures two GigabitEthernet interfaces (uses Gi0/0/1 and Gi0/0/2) as Active members in an LACP bundle (using Group ID 1)
>Customer then re-uses the burned-in MAC address of the first interface, Gi0/0/1, as the statically configured MAC address of the routed Port-channel interface
>No issues are seen, the Port-channel interface successfully uses the statically configured MAC address for both inject and transit traffic
>Then, customer saves the configuration and reloads the ISR4000
>When the router is back online, the Port-channel interface still has the same MAC address statically configured, but is using a Source MAC address of 0000.0000.0000 instead

Reload of an ISR4000 using LACP with a static MAC configured on a routed port-channel interface that is using a burned-in MAC address from a member of the port-channel.
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