Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

HSRP - determining active router

Does anyone have any insight on determining the active router for HSRP? I don't mean how do you do it, I mean how would you determine active state for a group of 20 subnets? How would you go about determining subnet 1 should be active on router 1 and subnet 2 should be active on router 2? Is there any technical reasons I should consider?

Basically I have two 6500 distribution layer switches configured with a port-channel between them and they are connected to a bunch of access layer switches. I'm using HSRP on the 6500's. My first thought is to simply stagger the VLANS so lets say Vlan 10 is active on 6500 #1 and then Vlan 20 is active on 6500 #2 and so on.

5 REPLIES
Cisco Employee

Re: HSRP - determining active router

The common design is to have STP root and HSRP active on the same switch. Most networks I have seen have STP root/HSRP active for all Odd numbered VLANs on one core/distribution and the other core for even numbered VLANs.

New Member

Re: HSRP - determining active router

So, if on switch 1 I have

spanning tree vlan 10,30,50 priority 8196

and

spanning tree vlan 20,40,60 priority 16384

Switch 1 should be active for vlans 10,30 and 50 and on Switch 2 vlans 20,40,60 would be active. Is this correct? Of course on switch 2 the statements above would be reversed.

Thanks,

Purple

Re: HSRP - determining active router

Thats correct and once it is setup if it is a native 6500 it's easy to check with the show spanning tree vlan xx and then do a show standby brief.

Cisco Employee

Re: HSRP - determining active router

Yes.. Assuming there are no other switches in the network with lower/better priorities.

New Member

Re: HSRP - determining active router

Thanks guys. This is exactly what I needed. I'm trying to rate the post but it doesn't seem to be working. I'll keep tryting and thanks again for the info.

282
Views
0
Helpful
5
Replies
CreatePlease to create content