Bgp - set as path

Discussion in 'Cisco' started by mmark751969, Apr 3, 2008.

  1. mmark751969

    mmark751969 Guest

    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, Apr 3, 2008
    #1
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  2. 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, Apr 3, 2008
    #2
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  3. 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, Apr 3, 2008
    #3
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