Failover issue

Hi guys,

 

 

Recently i ran into quite an unique problem and i can't seem to find a resolution nor article about it.

 

 

the scenario is as follow

 

 

 

unit 1 = active and unit = standby

 

redundency preference = none for both unit.

 

 

manual failover to both units are fine.

 

 

when i shutdown unit 1, unit 2 took over as active and it is fine.

 

when unit 1 come back up, i shutdown unit 2 and this is where the problem araise.

 

the failover is successful however traffic are not passing through.

 

 

i did a tcpdump capture and all i see are icmp request but no reply.

 

after unit 2 come back and i did a manual failover then i see icmp request and reply on the

 

dump.

 

 

anyone encounter this scenario before??

 

 

appreciate any input from anyone :D

 

cheers