BGP Route Selection

[shijomon scaria]

Dear All,

Please find the diagram attached with.

We have multiple VLANS in Location A. I want to divert some of the vlans traffic towards the secondary link (VPN) while communicating with Location B.

We have access only to location A switch (L1) and Location B router (L2). 

How can i achive this, please help.

Full neighbourship has been created between the locations via both links. Failover is happening also.

Thanks in advance

Shijo.

[Peter Paluch]

Hello Shijo,

If I understand you correctly then you want the traffic for a selected set of prefixes to traverse the backup link while other traffic should follow the primary link. Is that correct?

In a very basic scenario, this should be easily implemented by modifying the BGP Local Preference attribute for the selected prefixes so that the backup link is selected as their preferred path. However, can you extend your picture and include information about where exactly is the BGP deployed (which routers speak BGP) and what are the individual peerings? What internal routing protocol are you using? How many prefixes do you hold in BGP table?

Thank you!

Best regards,

Peter