>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


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---- 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
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