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Thread: route selection using BGP communities




route selection using BGP communities
user name
2007-04-15 10:55:25
hi,

I have two upstream providers i am running BGP , i am
receiving prefixes
with BGP community TAG from my customer's router he want to
select one of my
up stream provider for out going . currently route selection
is on AS PATH
Length.

what configuration should I do to send the traffic using
community tags
receiving from my customer.

Thanks

vicky.
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Re: route selection using BGP communities
country flaguser name
Finland
2007-04-16 04:31:36
On Sun, 15 Apr 2007, waqas Mohammad wrote:
> I have two upstream providers i am running BGP , i am
receiving prefixes
> with BGP community TAG from my customer's router he
want to select one of my
> up stream provider for out going . currently route
selection is on AS PATH
> Length.
>
> what configuration should I do to send the traffic
using community tags
> receiving from my customer.

This seems like a non-trivial problem.  It seems you will
need to 
(unless this is supported by your own topology and own
traffic 
patterns and requirements) to perform policy-based routing
for that 
customer or set up a tunnel.

You might need to use filter-based forwarding for this.  If
I recall 
correctly, and this may have changed since then, FBF
couldn't be 
configured using community tags but rather required more
static 
configuration (e.g., a prefix-list).

OTOH, affecting customer's upstream provider for _incoming_
could 
probably be achieved without policy-based routing.

-- 
Pekka Savola                 "You each name yourselves
king, yet the
Netcore Oy                    kingdom bleeds."
Systems. Networks. Security. -- George R.R. Martin: A Clash
of Kings
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