From: Brian McGahan (brian@cyscoexpert.com)
Date: Sat Dec 28 2002 - 17:50:10 GMT-3
David,
> 1) Why no-export and not local-as. I suspect they both would do the
job.
Local-as is used in a confederated AS to keep a prefix from leaving the
sub-as. In the case that you do not have a confederated AS, local-as
works the same as no-export.
> 2) In general WHEN DO I USE THE "Neigbor x.x.x.x Send Community"?????
Use the 'neighbor w.x.y.z send-community' command whenever you want to
include the community attribute with a BGP prefix you are advertising to
that peer. This applies to EBGP and iBGP peers alike. By default,
community attributes are stripped from the prefix when it is sent.
Therefore, you must always explicitly 'send-community' when you want to
include the community value.
HTH
Brian McGahan, CCIE #8593
Director of Design and Implementation
brian@cyscoexpert.com
CyscoExpert Corporation
Internetwork Consulting & Training
Voice: 847.674.3392
Fax: 847.674.2625
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
Of
> Giveortake@aol.com
> Sent: Saturday, December 28, 2002 2:25 PM
> To: ccielab@groupstudy.com
> Subject: CyscoExpert sample 1 BGP Communities
>
> Can someone help me with Send Communities?? When do I have to use
the
> "neighbor x.x.x.x send community"???
>
> This sample lab has R4 peered with a BB router in the "cloud". It
then
> uses
> a
>
> neighbor x.x.x.x route-map noexport in
>
> route-map noexport permit 10
> set community no-export
>
> There is a few other things in there, but that is the pertinent...
>
> 1) Why no-export and not local-as. I suspect they both would do the
job.
>
> 2) In general WHEN DO I USE THE "Neigbor x.x.x.x Send Community"?????
> This
> one is driving me nutz! When in doubt I throw in the send community
> command, and I always make it work, but that is poor substitute for
> understanding.
>
> Scanning links but not finding anything to clearly help me with the
basic
> send communities.........
>
> Thank You,
>
> David
> .
.
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