VVRP Using One ASN Router

[977128]

Hai,

Some one suggested to the customer two have 2 X 2mbps line connected to a singel ASN router
Then inform the customer that we can configured Serial0 to back up serial1 incase the L.Line goes down. Each Serial have a different IP and DLCI to be configured. With the requirement B backup A and vice-versa. I have looked at the VVRP doc but all is showing with two router. Can it be done on a single router.

Secondly how may I configured the remote router?, all router must have an primary IP with an active dlci then a secondary ip with an inactive dlci.

Hope some one have an idea about this

Thanks

 

[Toot1]

I have used VRRP but only on two different routers. The configuration is simple and it works great. My users do not even know when one router fails and the other kicks in. Just read the documentation on VRRP and it will take you all of 30 minutes to set it up and have it running.

The Virtual Router Redundancy Protocol (VRRP), which runs over IP, enables you to configure router redundancy to protect a network from the irrecoverable failure of one or more IP interfaces. VRRP manages a virtual router, which is a software-defined object that corresponds to an IP address on a LAN segment.

A virtual router typically exists on multiple routers running VRRP (known as VRRP routers). One of the VRRP routers acts as the master virtual router for an IP address, while other VRRP routers act as backup virtual routers. You identify each virtual router using a virtual router identifier (VRID) and a virtual router IP address. All VRRP routers on a LAN segment must have the same VRID and IP address. You can, however, use a VRID on more than one LAN as long as you pair it with a different virtual router IP address. Each virtual router is restricted to a single LAN.

 

[Jynxx]

For this type of configuration, you don't even need VRRP. Use OSPF or RIP to cost each link differently. They will automatically fail over in case of a link down.

Both DLCI's would need to be active, but to save cost on the "backup" line, you can set a very low CIR on that line. Don't set it at 0 though, because there will be a small amount of constant traffic between routers for routing updates, etc.

 

[GTomte]

Hello!

It's a higher possibility that a line fails, instead of a router. When using two equal lines, I would use ECMP (Equal Cost Multi Path). Then you can load balance between the lines, and you have automatic failover. I have used this several times, and it works great.

Regards
G. Tomte
Working with:
- Nortel Networks, Routers, switches
- Alteon
- CacheFlow
- Blue Coat