Solved: Re: 'set community' command ...

InternetB · ‎11-24-2008

Hi,

Just want to know more abt. the usage of this command. I know the command has its attributes like ie) export, internet ...etc. I want to know that if I see something like this,

set community 65111:2211

Is this command used to tag routes so that when it reached its neighbor, further action can be taken on it ?

Pls advice,

Cheers,

- InternetB -

royalblues · ‎11-24-2008

Yes exactly.

Communities are used to tag certain routes so that appropriate action can be taken on the prefixes carrying this tag as per the defined policy.

There are 4 standard communities available

internet

By default all prefixes belong to this community

no-export

routes tagged with this community are not advertised to any external BGP peers

no-advertise

Routes tagged with this community are not advertised to any BGP peer (external as well as internal)

Local-as

It is similar to no-export community but within a confederation

http://www.cisco.com/web/about/ac123/ac147/archived_issues/ipj_6-2/bgp_communities.html

HTH

Narayan

View solution in original post

royalblues · ‎11-24-2008