Forum Discussion

JG's avatar
JG
Icon for Cumulonimbus rankCumulonimbus
Feb 02, 2016

Which failover address gets used first in an event of network failover?

In this case, there are 3 failover IP addresses configured for use of failover: mgmt address, a self IP address in a dedicated HA VLAN, and a multicast address on the interface eth0.   Which addre...
application delivery
BIG-IP
LTM
IanB's avatar
IanB
Icon for Employee rankEmployee
Feb 02, 2016

The BigIP continuously sends keepalive packets to the failover addresses - you can see these with 'tcpdump -n -i udp and port 1026'. As long as the standby unit(s) see these packets, they will remain in standby state

 

A simultaneous failure to all addresses is required to trigger a failover.