>another thing is "community" attributes. just ask your service provider
>for the set of "community" attribute("private commmunities") that they
>created aside from the "well-known" communities to influence their
customer's
>policy.
You can remove the community information your ISP has placed internally, and
so you can set your specific community values if you need to do so.
For my point of view, you can:
Accept all the routes coming from your ISPs and set different community
values, then redistribute the routes to the internal routers (on which you
are matching on community).
Advertise network to ISP without US connection without prepending the AS
number
Advertise network to ISP with US connection with prepending twice the AS
number (once could be sufficent)
Then the routes advertised to the ISP with US connection will be prepended
as your other ISP hasn't got a direct US connection.
To be sure of the prepending times needed, you can use some traceroute
commands from web sites and check the number of transit AS before reaching
your peers.
regards
----------------------------------------------------------------------------
----------------------------------------------------------------------------
----------------
PEREZ Stephane
Carrier IP Specialist
Nortel Networks
ATS IP Core Infrastructure
25, allee Pierre Ziller
06560 Valbonne, FRANCE
Phone: +33 4 92 96 18 05 Mail : mailto:perezs@nortelnetworks.com
Fax : +33 4 92 96 16 68 www : http://www.nortelnetworks.com
Esn : 296-1805 Intranet :
http://hector.europe.nortel.com
-----Original Message-----
From: Roy Reyes [mailto:rreyes365@zdnetonebox.com]
Sent: 22 March 2001 07:18
To: Budi Widjojo
Cc: cisco-nsp@puck.nether.net
Subject: Re: [nsp] [nsp] best practice for bgp load balancing with
unequal bandwidth
> So if there are way to solve this problem beside doing a manual selection
> by
> as-prepend to a certain AS number?
if you don't want an as-prepend you can influence your next-hop AS by
doing a MED. it is applicable if you're connected to the same service
provider but if AS1 and AS2 have direct physical connection that talks
BGP you can use MED using "bgp-always-compare-med".
another thing is "community" attributes. just ask your service provider
for the set of "community" attribute("private commmunities") that they
created aside from the "well-known" communities to influence their
customer's
policy.
rgds,
roy
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This archive was generated by hypermail 2b29 : Sun Aug 04 2002 - 04:12:33 EDT