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HSRP on 3750G

I am using 2 3750G switches with EMI which will be my main redundant routers. Floor 1 will connect to Router1 and floor 2 will will connect to Router 2. How would I be able to setup these 2 switches as routers for HSRP with multiple VLans.

Ex. Say I have 192.168.0.x for these 2 routers

192.168.1.x for Server farm

192.168.2.x for Server farm

192.168.3.x for PCs

192.168.4.x for PCs

192.168.5.x for Finance

192.168.6.x for Marketing

Then some more of VLans for others.

Other SMI Cisco 3000 switches will connect to these 3750's which will be also connected to eachother between floors for redundancy.

Do I have to make 2 seperate standby groups for each VLan? or how would I do this ?

4 REPLIES

Re: HSRP on 3750G

yes here you are having multiple subnet so you can configure the different vlan and also configure the multiple HSRP group and you can have load balancing on it... so you will have utilization of resources also...

regards

Devang

New Member

Re: HSRP on 3750G

What happens if I stack these 2 switches with the stack cable and connect them? Will I still be able to setup HSRP ?

Re: HSRP on 3750G

When a device is participating in an HSRP standby routing and clustering is enabled, you can use the same standby group for command switch redundancy and HSRP redundancy. Use the cluster standby-group HSRP-group-name [routing-redundancy] global configuration command to enable the same HSRP standby group to be used for command switch and routing redundancy. If you create a cluster with the same HSRP standby group name without entering the routing-redundancy keyword, HSRP standby routing is disabled for the group.

Re: HSRP on 3750G

Hi Noobie,

when 2 switches are stacked together, it will act as one single single, so you cannot setup hsrp between those 2 switches, once the two switches are stacked, based on the MAC-address, switch up time & IOS version, which ever has got the higher priority, those configuration will sync each other, so hsrp between those 2 switches not possible when they are stacked. you need to have a those 2 switches seperately & connect then via UTP/OFC cable, then setup the HSRP, with the virtual IP. the configuration looks like......

switch A

interface Vlan2

description ***SERVER***

ip address 10.2.1.2 255.255.255.0

ip pim sparse-mode

standby 2 ip 10.2.1.1

standby 2 timers 5 15

standby 2 priority 109

standby 2 preempt

Switch B

interface Vlan2

description ***SERVER***

ip address 10.2.1.3 255.255.255.0

ip pim sparse-mode

standby 2 ip 10.2.1.1

standby 2 timers 5 15

standby 2 priority 108

standby 2 preempt

in this configuration, 10.2.1.1 is the virtual IP which is commenly set up in 2 switches & the real IP only varies. so in the pc's 10.2.1.1 should be the gateway, which means if 10.2.1.2 fails, this 10.2.1.1 will act as 10.2.1.3, because priority is set low in 10.2.1.3. hope your clear with this.

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