[isp-bgp] Re: Outbound Balancing

[James <haesu@...>]

it won't be ignored, as he's setting med on inbound routes and setting
always-compare-med.. this is not deterministic-med here, remember :)

however, MED is for influencing INBOUND ROUTING POLICY, _NOT_ outbound
routing policy. using MED for outbound TE is a piss poor man's lazy
job.

in this case, i do the same thing as what jlewis said. analyze your 
network traffic first, then selectively prepend or set LP. if you have
multiple transits at multiple locations and different routers, IGP costs
on transit circuit also come into play for different type of situations.

-J


On Sat, Apr 24, 2004 at 08:05:06AM -0400, Pete Templin wrote:
> Iljitsch van Beijnum wrote:
> 
> >You can set the local preference, as per James' example. The downside of 
> >that is that it completely overrides looking at the path so it's a bit 
> >severe. Or you can use the multi exit discriminator metric. But this has 
> >a pretty much identical effect to prepending, so you need to do it 
> >selectively, for instance:
> 
> For instance, ONLY if you have two pipes to an upstream, and you want to 
> influence how the traffic is balanced among them INBOUND.
> 
> MED would be ignored in this person's topology.  Stick to local 
> preference tuning (or prepending) based on specific ASes that are two 
> ASes away from you (in other words, your providers' providers).
> 
> pt
> 
> 




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-- 
James Jun                                            TowardEX Technologies, Inc.
Technical Lead                        Network Design, Consulting, IT Outsourcing
james@...                  Boston-based Colocation & Bandwidth Services
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