"Local-AS" if viewed in a Confederation point of view tells the BGP router to keep this community info within this "local"(confed) Local-AS, and not to an IBGP peer that does not belong to my "local" confederation peer ID.
The "no-export" pertains to EBGP peer. This got me confused too until I realised that you can have a "local" Local-AS in a confederation. HTH, Elmer Note: if it's still fuzzy, check Confedration example by Halabi on CCO's BGP4 Case Studies. ----- Original Message ----- From: "Hunt Lee" To: Sent: Wednesday, February 13, 2002 9:01 PM Subject: Re: set community no-export V.S. set community local-as [7:35355] > John, > > So isn't that Local-AS means can only send routes within the local AS, while > no-export means only advertised to IBGP peers (which means advertised to > only local AS).. so aren't they the same thing - I'm still very confused. > > Best Regards, > Hunt Lee > WebCentral > > > ""John Neiberger"" wrote in message > [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > > From reading an FAQ on CCO: > > > > Community Description > > > > Local-AS: Use in confederation scenarios to prevent sending > > packets outside the local autonomous system (AS). > > > > no-export: Do not advertise to external BGP (eBGP) peers. Keep > > this route within an AS. > > > > no-advertise: Do not advertise this route to any peer, internal > > or external. > > > > none: Apply no community attribute when you want to clear the > > communities associated with a route. > > > > internet: Advertise this route to the internet community, and > > any router that belongs to it. > > > > HTH, > > John > > > > > > ________________________________________________ > > Get your own "800" number > > Voicemail, fax, email, and a lot more > > http://www.ureach.com/reg/tag > > > > > > ---- On Sun, 10 Feb 2002, Cebuano ([EMAIL PROTECTED]) wrote: > > > > > Aren't these two acvhieving the same purpose? Please tell me > > what i'm > > > missing. > > > Thanks. > > > > > > Elmer > > > > > > In the following example, routes that pass the autonomous > > system path > > > access > > > list 1 have the community set to 109. > > > Routes that pass the autonomous system path access list 2 > > have the > > > community > > > set to no-export (these routes > > > will not be advertised to any external BGP [eBGP] peers). > > > > > > route-map set_community 10 permit > > > match as-path 1 > > > set community 109 > > > > > > route-map set_community 20 permit > > > match as-path 2 > > > set community no-export > > > > > > > > > In the following similar example, routes that pass the > > autonomous system > > > path > > > access list 1 have the community > > > set to 109. Routes that pass the autonomous system path > > access list 2 > > > have > > > the > > > community set to local-as > > > (the router will not advertise this route to an eBGP peer > > outside the > > > local > > > autonomous system. > > > > > > route-map set_community 10 permit > > > match as-path 1 > > > set community 109 > > > > > > route-map set_community 20 permit > > > match as-path 2 > > > set community local-as > > [EMAIL PROTECTED] Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=35365&t=35365 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
