Secondary ip address on 5400/3500

[Arimo]

That should work, yes. Just configure different priorities to the routers.

[fje839dpw]

Attempting to configure a secondary IP address to a VLAN on a HP 5400 series switch. There is a desire to configure a secondary IP address on the VLAN that is in the same subnet as the primary address since there are some older device still configured to use a different default gateway address. Since there does NOT appear to be an ip address assignment with a "secondary" option, I attempted the configuration provided a few years back but this does NOT appear to working (e.g. no backup option). The following configuration is not working 

vlan 10

ip address 192.168.10.1 255.255.255.0

vrrp vrid 10

backup (this command does not exist)

virtual-ip-address 192.168.10.254

enable

I am currently running image K.15.18.006.

I would appreciate any assistance one can provide.

Thanks!