From: Moin, Imran (imoin@virtela.net)
Date: Tue Jan 18 2005 - 03:19:28 GMT-3
The best solution to your network will be to have iBGP between the 2
routers, in addition to HSRP on the inside. This way, even if your BGP
session on Router 1 (HSRP Master) goes down, traffic will failover to go
from Router 1 to Router 2 and out via the second ISP.
-Imran.
-----Original Message-----
From: Alexander Arsenyev (GU/ETL)
[mailto:alexander.arsenyev@ericsson.com]
Sent: Friday, January 14, 2005 8:18 AM
To: 'Geert Nijs'; 'ccielab@groupstudy.com'
Subject: RE: Tracking a BGP session with HSRP
Another thought - You may find a way to track BGP TCP session as You
originally described below but
what would You do if Your 1st ISP lost BGP session with his upstream? In
this case Your BGP TCP
session with Your 1st ISP will be perfectly OK but no connectivity through
him :-[
Tracking specific routes ("golden prefixes" are very good candidates) solves
this problem just fine.
HTH,
Cheers
Alex
-----Original Message-----
From: Alexander Arsenyev (GU/ETL)
Sent: 13 January 2005 18:13
To: 'Geert Nijs'; ccielab@groupstudy.com
Subject: RE: Tracking a BGP session with HSRP
Hello,
Why can't you just track the reachability of BGP routes to root DNS servers
("golden prefixes")?
http://www.qorbit.net/documents/golden-networks
Presumably they should never be damped and remain very stable. Not 100%
fool-proof, of course ;-]
HTH,
Cheers
Alex
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]
Sent: 13 January 2005 16:04
To: ccielab@groupstudy.com
Subject: Tracking a BGP session with HSRP
Hi group,
Topology: 2 routers with a connection to two ISPs. Inside default gateway is
a HSRP address.
For redundancy reasons i have configured HSRP with tracking. However, i
would like to track a BGP session, not an
interface. The reason for this is clear: the BGP session can die, while the
interface remains up. HSRP would not switch in this
case. Any ideas on how to accomplish this ?
- interface tracking - nope
- tracking with SAA (ping, TCP) - not really - i could track the possibility
of TCP to the remote peer...but that is not the same as tracking the
existing BGP session.
Regards,
Geert
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