Re: BGP: UPDATE Packet Problem

From: Peter van Oene (pvo@xxxxxxxxxxxx)
Date: Tue Jun 04 2002 - 21:56:14 GMT-3


   
inline

At 02:51 PM 6/4/2002 -0700, Khurram Khani wrote:
>Hi All,
>
>Question:
>
>If I add a route-map to a BGP neighbour already in ESTABLISHED state and
>then prepend AS_PATH attibute, do I need to reset BGP neighbour to get the
>new changes in new UPDATE Packet?? I dont see Router sending an UPDATE
>packet though i have changed the AS_Path attribute.

Clear soft out is the easiest way to deal with policy changes

>When I do a soft-reset I see BGP Router sends out an UPDATE but without
>WITHDRAWING the previous route. I have a Linux Zebra BGP Router on other
>side, it ignores the UPDATE coming for an existing Route in the table.

An update for a prefix inherently includes a withdraw for any previous
versions.

>Question
>
>Q. Does a BGP neighbour needs to withdraw a route first before sending an
>update with same NLRI with modified attribute or sending an UPDATE directly
>with modified attributes works?

See above

>Help appreciated
>
>thanks
>Khurram.



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