[isp-bgp] Multiple Peerings on the same link

["Tulip Rasputin" <tulip_rasputin@...>]

Hi,

Any reason why somebody would want to have multiple BGP peerings/sessions 
with the *same* router over the same link? I can understand, if its multiple 
links (load balancing and redundancy), but why over the same link?

One possible reason that comes to my mind is: if one of the peers wants to 
implement some sort of policies, so he accepts one feed over one session, 
applies its policies and accepts the same feed over the other BGP session 
and applies a different set of policies. I know, all of this can be done 
with a single BGP session too, but this is the best that comes to my mind. 
Has anyone in this list ever seen such a case, wherein we have multiple BGP 
sessions between the same peers over the same link!

Regards,
Tulip 







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