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Cisco Bug: CSCvv90720 - Mac address-table is flapping on 3850 when ASA etherchannel is configued with active mode

Last Modified

Oct 19, 2020

Products (1)

  • Cisco Adaptive Security Appliance (ASA) Software

Known Affected Releases


Description (partial)

The customer did a ping test from PC1 to PC2.

PC1---3850-1=====              ======3850-2---PC2

On PC1, set the gateway as tpye2 interface’s IP(172.24.A.x) of ASA-primary.
On PC2, set the gateway as type1 interface’s IP(172.24.B.x) of ASA-primary.

Ping works well when ASA(primary) device acted as an active role.
However, more than 3% packet loss occurred when ASA5508(secondary) device acted as an active role.

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