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Secondary IP address with HSRP

TOM FRANCHINA
Level 1
Level 1

We had a power failure and the primary IP address went down moved to the standby router as designed using HSRP. The problem is when a secondary address was added to the VLAN.. there was no HSRP programmed for it. So we have one router doing the primary and another doing the secondary.

We need to get everything on the 6509 router. The 3750 stack/router is going to be remove in the near future anyway.

We need to do this with little or no interuption because this is our server network. Devices on both 192.168.23.x and 10.23.x.x are all working now.

Thanks as always !!!!

Here are the configs:

EMI 3750:

interface Vlan23

description Primary Vlan 23 Router

ip address 10.23.0.1 255.255.0.0 secondary

ip address 192.168.23.244 255.255.255.0

ip helper-address 192.168.23.2

ip helper-address 192.168.23.82

ip helper-address 192.168.23.77

standby 23 ip 192.168.23.1

standby 23 priority 105

end

sho standby br

Interface   Grp Prio P State    Active          Standby         Virtual IP

Vl23        23  105    Standby  192.168.23.252  local           192.168.23.1

6509 ( needs to made primary)

interface Vlan23

description backup Vlan 23 Router

ip address 192.168.23.252 255.255.255.0

ip helper-address 192.168.23.82

ip helper-address 192.168.23.77

no ip redirects

ip flow ingress

standby 23 ip 192.168.23.1

standby 23 priority 95

end

sho standby br | in 23

Interface   Grp Prio P State    Active          Standby         Virtual IP

Vl23        23   95    Active  local           192.168.23.244  192.168.23.1

1 Reply 1

bgroves
Level 1
Level 1

Add 10.23.0.0 to the 6509 as secondary.

Add hsrp for secondary network to both.

You'll take a brief hit on vlan 23 when you change the ip on the 3750 and add hsrp for that subnet.I'd make a change file and config net but even cut/paste will be brief ( you will ssh to the 3750 using an ip other than that secondary on vlan 23 I trust)

Set priority for standby on secondary to favor big Cat.

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