Forum Discussion

mikegray_198028's avatar
mikegray_198028
Icon for Cirrus rankCirrus
Jan 14, 2016

unable to ping server behind ltm

We have servers's default gateway is the LTM's floating IP and we configured wildcard(forward vip) vip also. After upgrade from VE 10.2.4 to VE 11.5.1 we are facing issue with icmp. We are unable to...
application delivery
BIG-IP
LTM
tyson_244880's avatar
tyson_244880
Icon for Nimbostratus rankNimbostratus
Jan 16, 2016

@ mike can you elaborate.when we disable arp for vips on ltm using command "modify virtual-address any arp disabled", how is it going to effect icmp echo. Also i can see that you were facing this issue after upgrade from VE 10.2.4 to VE 11.5.1. you would have definitely tried to failover . there is when the problem would have started, if i am right. According to my knowledge, arp would have been disabled before the failover. when you tried to failover, BIG-IP virtual addresses sent gratuitous Address Resolution Protocol (ARP) messages after a failover event due to which BIG-IP virtual addresses that should not respond to ARP requests start receiving arp-traffic after failover.