[j-nsp] BGP routing with JunOS

[Marcin Garstka]

Hi Chris
Please find below short examples of  policies which should work in your 
case. You can apply the policies as import or export for some/all of your 
BGP peers.
Marcin


At 00:08 2006-01-23, you wrote:
>Having used Cisco for years and after moving to Juniper last week, a few
>things have escaped my grasp with JunOS.  A very rough start with the
>unit with compatibility with other units on our network, but, that is
>getting worked out.
>
>Does someone have a quick template for the following:
>
>* Match destination AS and set community

policy-statement your-policy {
   term destination-as
     from {
         protocol bgp;
         as-path path-destination-as;
     }
     then {
         community set your-community;
         accept;   <--- do not use accept if you want next terms/policies 
to evaluate the routes which match here
     }
   term transit-as
     from {
         protocol bgp;
         as-path path-transit-as;
     }
     then {
         community set your-community;
         accept;    <--- do not use accept if you want next terms/policies 
to evaluate the routes which match here
     }
}

community your-community members 1234:5678
as-path path-destination-as ".* 1234";
as-path path-transit-as ".* 1234 .+";




>* match transit AS and set community
>* use community to determine next-hop


policy-statement set-next-hop {
   term set-next-hop
     from {
       protocol bgp;
       community your-community;
     }
     then {
        next-hop 1.2.3.4;
        accept;     <--- do not use accept if you want next terms/policies 
to evaluate the routes which match here
     }
}



>I want to remove my local communities prior to export, but, leave some
>communities when exported to particular peers.


You can use 'community del ...' to remove some communities and leave the rest.



>Thanks.
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