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Cisco - Bgp - set as path

 
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Old 04-03-2008, 04:07 AM   #1
Default Bgp - set as path


i am aware that A BGP speaker can influence the best path selection by
a peer by varying the length of the autonomous system path. If i have
a statement like
route-map ISP-IN permit 10
set as-path prepend 56324 56324 56324 56324 56324

and

neighbor 54.134.156.9 route-map ISP-IN in

am i actually making the neighbor 54.134.156.9 using route-map isp-in
more or less attractive, in recieving inbound traffic to my router.
Thanks


mmark751969
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Old 04-03-2008, 06:03 AM   #2
Andrey Tarasov
 
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Default Re: Bgp - set as path
mmark751969 wrote:
> i am aware that A BGP speaker can influence the best path selection by
> a peer by varying the length of the autonomous system path. If i have
> a statement like
> route-map ISP-IN permit 10
> set as-path prepend 56324 56324 56324 56324 56324
>
> and
>
> neighbor 54.134.156.9 route-map ISP-IN in
>
> am i actually making the neighbor 54.134.156.9 using route-map isp-in
> more or less attractive, in recieving inbound traffic to my router.


Wrong direction. Should be "route-map <map name> out"

Regards,
Andrey.


Andrey Tarasov
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Old 04-03-2008, 06:39 AM   #3
Barry Margolin
 
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Default Re: Bgp - set as path
In article <ft1oea$28sh$>,
Andrey Tarasov <> wrote:

> mmark751969 wrote:
> > i am aware that A BGP speaker can influence the best path selection by
> > a peer by varying the length of the autonomous system path. If i have
> > a statement like
> > route-map ISP-IN permit 10
> > set as-path prepend 56324 56324 56324 56324 56324
> >
> > and
> >
> > neighbor 54.134.156.9 route-map ISP-IN in
> >
> > am i actually making the neighbor 54.134.156.9 using route-map isp-in
> > more or less attractive, in recieving inbound traffic to my router.

>
> Wrong direction. Should be "route-map <map name> out"


And the answer to the question is that you're making it less attractive.
Shorter AS paths are preferred.

--
Barry Margolin,
Arlington, MA
*** PLEASE don't copy me on replies, I'll read them in the group ***


Barry Margolin
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