here is the topology:
I have a cluster GW R77.30 and each cluster has an interface in VLAN 142 which are connected to Cisco L2 switch and on the other hand our client has two redundant server that are connected to another Cisco L2 switch and they configured the servers GW with my GW VIP 192.168.10.17
192.168.10.10 Server 1 <---- 192.168.10.19 FW -1 active
Cisco 3750 <-----> Cisco 3850<----- VIP 192.168.10.17 <------ server B
192.168.10.11 server 2 <----- 192.168.10.18 FW-2 Passive
1- in our network a few servers are in server B side want to talk to server 1 and 2
2-server 1 and 2 are Linux
so the problem is when client patching their servers( 1 and 2) and reboot them all TCP session from server B will be down and server 1 and 2 not respond to any TCP or ICMP request and when they ping VIP .17 is not getting response so they have to ping our FW physical IPs .18 and .19 and then ping VIP .17 , do you have any idea of this issue?
how the cluster FW handle ARP broadcasting ?
appreciate that if you share your experience