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configuring auto failover for clients over two ethernet interfaces

we are an isp, we have clients that have two links from us these links are terminating on ethernet ports on our core switches(conected to the PE routers). The desire is to achieve an auto failover between between these two links for the clients, for clients on the MPLS platform their is no issue but the challenge are the clients using static routes on their network and are not ready to move to dynamic routing. Is there a way around this?

3 REPLIES

Re: configuring auto failover for clients over two ethernet inte

You can do this by Using loopback address

create a lopback interface at both sides

Let the customer have the default route pointing to your loopback interface

similarly your route for the customer subnet should point to thier Loopback interface

Route the loopback IP primarily via one ethernet interface and backed up by the other

eg.

interface loopback 1

des " connected to customer network 100.100.100.0/24

ip address 1.1.1.1 255.255.255.255

int e0/0

ip address x.x.x.x y.y.y.y

int e0/1

ip address x.x.x.x y.y.y.y

ip route 100.100.100.0 255.255.255.0 1.1.1.2

ip route 1.1.1.0 255.255.255.252 ethernet0/0

ip route 1.1.1.0 255.255.255.252 ethernet0/1 20

Similar configuration on the customer side

HTH, rate if it does

Narayan

New Member

Re: configuring auto failover for clients over two ethernet inte

Thanks,

i will prefer to do dynamic on my own PEs because i have many clients and having static routes for each will be cumbersome.

i believe eBGP should do, using my own public AS in my network and private AS in the clients, but i need help on how to go about it.

Re: configuring auto failover for clients over two ethernet inte

There are lot of ways for doing this via BGP.

You can create a BGP relationship between the clients on the loopback address. Rest of the configurations will be same.

router BGP

neighbor remote-as

second approach would be to create 2 BGP relationship with the ethernet Ip address and use attributes like local preference, MED to influence routing. This would also require the client to do the same to influence his outgoing traffic

HTH, rate if it does

Narayan

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