[j-nsp] auto-export vs rib-groups

[Gary Tate]

Hi R.N

It is not true that ALL routes are moved between VRFs when auto export 
is used.  In both the vrf and non-vrf implementation you can use 
policies to control which routes are imported and exported and all 
features of the policies are used.  The only thing you cannot change 
using the policies is the next-hop for obvious reasons.

In the VRF implementation the policies in vrf-import and vrf-export are 
applied.
In the case of non-vrf instances instance-import and instance-export 
policies are honoured

The benifits of auto-export is the reduction in the amount of 
configuration required and the ease of understanding.

Gary

On Thursday, Nov 6, 2003, at 07:25 US/Pacific, Joe Soricelli wrote:

> Agree with all but the 'flexible' part. Auto-export is way easier but 
> it
> moves ALL of the routes between the VRFs. Rib-groups require a lot of
> thought and configuration, but you have the option of applying routing
> policies to the groups which allows you fine-grained control over which
> routes are shared and which are not. So, I would argue that rib-groups
> are more flexible in the long run.
>
> -joe
>
>> -----Original Message-----
>> From: juniper-nsp-bounces at puck.nether.net
>> [mailto:juniper-nsp-bounces at puck.nether.net] On Behalf Of
>> Chris Hellberg
>> Sent: Thursday, November 06, 2003 3:08 AM
>> To: MPLS Newbie; juniper-nsp at puck.nether.net
>> Subject: RE: [j-nsp] auto-export vs rib-groups
>>
>>
>> R.N.,
>>
>> Using auto-export is a lot more flexible than rib-groups both
>> from a theoretical and experience point-of-view; rib-groups
>> bring pain.
>>
>> It's also easier to explain to others how the coupling
>> between auto-export and policies work rather than try and
>> explain how rib-groups import and export routes between VRFs
>> (the configuration also changes depending on the protocol the
>> route has been learned from).
>>
>> Chris
>>
>> Just an addendum, if you've got any IPVPN policies that once
>> used a match on protocol bgp as well as a community, you'll
>> need to remove that for routes you wish to import that are
>> imported from the same node.
>>
>>
>> -----Original Message-----
>> From:	MPLS Newbie [mailto:routernewbie at hotmail.com]
>> Sent:	Thu 11/6/2003 6:56 PM
>> To:	juniper-nsp at puck.nether.net
>> Cc:	
>> Subject:	[j-nsp] auto-export vs rib-groups
>> Dear List,
>>
>>    Can someone comment based on operational experience or
>> router-geeking
>> experience regarding to using the knob of auto-export to
>> exchange routes
>> among vrf's vs using rib-groups to achieve the same?
>>
>> any pro's or con's?
>>
>> Much appreciated.
>>
>> Router Newbie
>>
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>>
>>
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