[j-nsp] Question on "auto-export" Layer 3 VPN

[MSusiva]

Hi Guys,

Thanks for the reply.This document does really helps to understand what
"auto-export" means.
I also understood what is the difference between auto-export and RIB groups
in leaking the routes b/w VRF on the same PE. But I have one question,

Using RIB groups will consume more cpu/memory than auto-export? Any
thoughts?

Thanks,
Siva*


> 2011/8/25 Daniel Roesen <dr at cluenet.de>
>
> > On Thu, Aug 18, 2011 at 11:04:03AM +0530, MSusiva wrote:
> > > Can someone please help me understand the following,
> > >
> > > * Why do I need to configure "auto-export" on Hub router?
> > >
> > > If I remove the "auto-export" on the Hub router, I'm not receiving the
> > > local, direct & static routes from the Spokes.
> >
> > Hope that helps:
> >
> >
> http://kb.juniper.net/library/CUSTOMERSERVICE/GLOBAL_JTAC/auto-export-understanding.pdf
>
>
> I have to say I found this confusing and I already know what auto-export
> does.  So by default juniper will not export routes learned locally by a PE
> to vrf's on that same PE even if they match the export policies.  The pdf
> says it's split horizon type behavior, but I always thought it was because
> the routes were never exported into BGP so the extended communities never
> get applied.  Whatever the reason, auto-export makes those
> routes eligible to be copied between VRF's local to a PE.
>
>
-- 
Thanks,
Siva