Active gateway is unreachable

Symptom

You are unable to ping the active gateway.

Action
  1. Verify that kernel interface is created for active gateway:
    003000000000001@vlan3: <NO-CARRIER,BROADCAST,UP,M-DOWN> mtu 1500 qdisc noqueue state 
    LOWERLAYERDOWN group default qlen 1000
        link/ether 00:00:00:00:00:01 brd ff:ff:ff:ff:ff:ff
  2. Verify that the active gateway IP is programmed correctly on kernel interface:
    003000000000001@vlan3: <NO-CARRIER,BROADCAST,UP,M-DOWN> mtu 1500 qdisc noqueue state 
    LOWERLAYERDOWN group default qlen 1000
         link/ether 00:00:00:00:00:01 brd ff:ff:ff:ff:ff:ff
         inet 10.0.0.3/32 scope global 003000000000001     
         valid_lft forever preferred_lft forever     
         inet 20.0.0.3/32 scope global 003000000000001    
         valid_lft forever preferred_lft forever
    
  3. Verify that the active gateway VMAC is correctly configured in the hardware. The command used is platform-specific. Refer to the hardware documentation for your switch.
    The following example from the 8400 series switch:
    8400X:/home/admin# ovs-appctl l3pd/show router-mac –a