From: Carlos G Mendioroz (tron@xxxxxxxxxxx)
Date: Tue Jun 04 2002 - 20:15:46 GMT-3
Seems to be a Zebra problem...
>From RFC1771:
9. UPDATE Message Handling
...
i) If its Network Layer Reachability Information (NLRI) is identical
to the one of a route currently stored in the Adj-RIB-In, then the
new route shall replace the older route in the Adj-RIB-In, thus
implicitly withdrawing the older route from service. The BGP speaker
shall run its Decision Process since the older route is no longer
available for use.
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.
>
> 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.
>
> 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?
>
> Help appreciated
>
> thanks
> Khurram.
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