My understanding is that JUNOS evaluates the route one by one each time
through the policy, the calling policy of subpolicy also passes the route.
If this is correct, seems to me the evaluation result of each route is
independent, then how could we achieve conditional advertisement using
policy? I must be missing something.
Thanks
Kent
----- Original Message -----
From: "HHH" <jnciecert@yahoo.com>
To: <mellotte@netcsc.com>; <juniper-nsp@puck.nether.net>
Sent: Monday, April 29, 2002 10:29 PM
Subject: Re: Juniper equivalent of Cisco's BGP Conditional Advertisements
> ..and you also have to use aggregates in conjunction
> as the variable.
>
> --- HHH <jnciecert@yahoo.com> wrote:
> > There isn't a command that directly does this, but
> > can
> > be acheived using juniper policy
> > expressions...remember, (p1 && p2) || p3 is
> > equivalent
> > of if p1 then p2 else p3... be creative.
> >
> > --- Eric Mellott <mellotte@netcsc.com> wrote:
> > > Does anyone know if and how Juniper implements
> > > something similar to Cisco's
> > > BGP Conditional Advertisements. Cisco's
> > > Conditional advertisement is
> > > useful in a multihomed network, in which some
> > > prefixes are to be advertised
> > > to one of the providers, only if information from
> > > the other provider is
> > > missing. This condition would indicate a failure
> > in
> > > the peering session, or
> > > partial reachability. So, basically routes are
> > > advertised only if other
> > > routes disappear from table.
> > >
> >
> >
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>
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