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New Member

Redundant links

Hello,

Please have a look at attached diagram. R1 is attached to MPLS VPN backbone and internet, R2 and R3 are connected through MPLS VPN to R1 and also directly. All sites are accessing HQ through MPLS VPN backbone using OSPF for intranet and internet. Remote sites have ADSL backup links for redundancy. If the link between R4 and backbone fails and is it possible to switch to ADSL link to route all traffic and to access HQ. Please guide.

Regards

2 REPLIES

Re: Redundant links

Hello,

there are various ways in which you can configure the ADSL link as a backup to the MPLS VPN, the easiest being to define two static default route, one of which has a higher administrative distance:

ip route 0.0.0.0 0.0.0.0 Tunnel0

ip route 0.0.0.0 0.0.0.0 ATM0.1 250

This way, all you traffic would be routed out the tunnel VPN interface that connects to the MPLS cloud, and the ADSL link would only become active when the primary interface fails.

Regards,

GNT

New Member

Re: Redundant links

Hello,

Thanks for your email.Right now we are connected with MPLS backbone using switches not routers and internal traffic to HQ is going through mpls links and Internet traffic going through ADSL links and we cant switch to adsl due to a link failure. Now I am thinking to deploy routers and have ospf and use adsl as backup. Any remote location may use intranet and internet via mpls backbone and in case of link failure switch to adsl link for intranet and internet traffic. Suggestions are welcome.

Regards

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