HSRP setup

[danbr2233]

Hello all, wonder if someone can help.

We have two L3 switches connected to two routers that the ISP control, this is setup with HSRP. Now there are additional ranges that are added, do these need to be setup with HSRP as well? On just the switches, or the ISP routers to? I was initially under the impression that all that would be required was the existing HSRP and any traffic routed on top of this wouldn't need anything else changed, but this doesn't seem to be working if the primary switch goes down.

This is an existing network so a bit of a pain to start changing all the gateways if so.

Please see attached a quick mock up in packet tracer that explains the situation

[Philip D'Ath]

Is the new subnet being routed via an existing device?  If so, no additional HSRP group is needed.

If it is being dumped into the same VLAN then you will probably need an extra HSRP group.

[danbr2233]

Not sure if you saw the attachment, but both ranges route from the ISP routers. We had some power work completed where the primary switch went down for a brief period, and at this time 185.1.1.1 was not pinging from the outside, so I'm just trying to see where the issue is.

Heres a snippets from the configs, a end device (server) is using the gateway 185.1.1.1

Switch 1

interface Vlan100
ip address 188.1.11.1 255.255.255.0 secondary
ip address 185.1.1.1 255.255.252.0

interface Vlan400
ip address 5.1.1.229 255.255.255.248
no ip redirects
no ip proxy-arp
standby 0 ip 5.1.1.228
standby 0 priority 105
standby 0 preempt

ip route 0.0.0.0 0.0.0.0 5.1.1.225

Switch2

interface Vlan100
ip address 188.1.11.1 255.255.255.0 secondary
ip address 185.1.1.1 255.255.252.0

interface Vlan400
ip address 5.1.1.230 255.255.255.248
no ip redirects
no ip proxy-arp
standby 0 ip 5.1.1.228
standby 0 preempt

ip route 0.0.0.0 0.0.0.0 5.1.1.225

[paul driver]

Hello

Now there are additional ranges that are added

I am assuming these are for the new L3 vlans interfaces , if so then yes HRSP for those are required as these  will be the vips (D/G) for the clients relating to that vlan?

As for the hrsp between the routers and the switch, nothing extra is require here.

res
Paul

[danbr2233]

If you see my response below it's for the IP ranges in vlan100, there not new but wasn't aware that HSRP needed to be setup for these as well, so they have never worked if that's the case.