Forum Discussion
Specifying unicast addresses for failover
When specifying unicast, rather than multicast, addresses for failover, you
need to specify two pairs of IP addresses, where one of the pairs indicates
the management IP addresses of the two units. The other pair indicates two
self IP addresses, one for VLAN HA on each unit.
Why is that , if the idea is just to let each unit sense the other , why to use management Ips , it was sufficient to use Vlan HA IPs ?
i mean :
bigip_B|192.168.15.17|192.168.15.18|1026
bigip_B|10.10.10.2|10.10.10.3|1026
one of them ( the HA vlan ) was sufficient , why to put management Ips ?
- nitass
Employee
mgmt interface/ip is always available while tmm interface/selfip is not. for instance, while booting bigip, tmm might not be ready fast enough and ha pair might end up with active-active if only selfip is configured in unicast pair since unit is not able to reach peer's selfip. - SSHSSH_97332
Nimbostratus
Thanks alot - SSHSSH_97332
Nimbostratus
and for this to be useful , should the management interfaces sense each others ( be connected at same switch for example ) - nitass
Employee
and for this to be useful , should the management interfaces sense each others ( be connected at same switch for example ) it is not required to connect them to the same switch. - SSHSSH_97332
Nimbostratus
Thx nitass , but the customer still need any sitiuation at which it may not work without mgmt , can u give me any good example - nitass
Employee
can u give me any good example for example, in ha pair, if we reboot unit1, unit2 will be active. in case if redundancy state preference is none, unit1 won't preempt an active role when coming back. anyway, if sod process is ready before tmm, sod may force unit1 to be active since unit1 is not able to communicate to unit2 via tmm interface/selfip. - SSHSSH_97332
Nimbostratus
Thx Alot - pr
Nimbostratus
Hi Nitass,
So does it means that if self IPs goes down and mgmt ip is till remians up then failover b/w the devices wouldn't occur ???
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