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New Member

HSRP or VRRP or GLBP

Hi;

At customer site; there are two 4507 and 22 2960. I have some questions about these redundancy protocols in my mind. If active router's one linecard or some ports are broken down, how can we do redundancy?

3 REPLIES
New Member

Re: HSRP or VRRP or GLBP

HSRP will provide redundancy for this in two ways;

1. If the ports which go down are serving the redundant next-hop connections, the hello messages will no longer be exchanged and the back-up router will become active for that HSRP group.

2. HSRP provides interface tracking, which will reduce its priority by a set amount (10 by default) for each tracked interface that goes down. This is useful for tracking uplink connections for example, where a failure will cause the priority to drop and therefore the backup router will become acive for the groups configured to track these failed interfaces.

I hope this helps.

Tom.

Super Bronze

Re: HSRP or VRRP or GLBP

All the protocols you name, "HSRP or VRRP or GLBP", provide for and coordinate a gateway address within the same group. (More than one device needs to be in the group to provide redundancy.) If a group member drops off, other group members will eventually cover for it if necessary, usually within a couple of seconds.

Silver

Re: HSRP or VRRP or GLBP

HSRP: Cisco Propritory.. You are using it for single gateway.

VRRP: Supports Multi Vendor.. Same as HSRP. For single gateway.

GLBP: For single gateway over Loadbalncing. It assigns two virtual mac address and depend upon health check it does forward.

Regards,

Dharmesh

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