[nsp] eBGP routes not balancing

Roger grunky at rockriver.net
Mon Jan 5 18:28:27 EST 2004


With reguards to load balancing and meds I found a few urls that might help

http://www.nanog.org/mtg-0310/pdf/smith.pdf

page 55 of the pdf talks about how the best route is always reselected 
based upon the age of the peer - and how to change that

and

http://www.cisco.com/en/US/tech/tk365/tk80/technologies_tech_note09186a0080094925.shtml

This cisco url talks about how *bgp deterministic-med* and the *bgp 
always-compare-med differ..  This page also mentions that

"**Note:* Cisco Systems recommends enabling the *bgp deterministic med* 
command in all new network rollouts. For existing networks, the command 
must either be deployed on all routers at the same time, or 
incrementally, with care to avoid possible internal BGP (iBGP) routing 
loops."

lastly the bgp bestpath algorithum - how routes get moved from the bgp 
rib to the routing table.  Also discusses on what commands can be used 
and how they effect this behavior.  ie - skip or change default behaior 
is paramter xyz is set..  Very helpful and full of links...  Also 
briefly mentions BGP multipath.  Which is kinda neat for load balancing 
purposes but hard to achive because so many attributes need be the same.

http://www.cisco.com/en/US/tech/tk365/tk80/technologies_tech_note09186a0080094431.shtml

-- 
Rock River Internet                          Roger Grunkemeyer
202 W. State St, 8th Floor                grunky at rockriver.net
Rockford, IL 61101                                815-968-3888





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