Re: BGP and the route table

From: zheng jiang gu (zjgu@xxxxxxxxxx)
Date: Fri Dec 29 2000 - 00:24:25 GMT-3


   
Do you use loopback ?

zjgu

00-12-28 6:07:48, Vikas Gupta <vicky_gupta1803@yahoo.com> wrote:

>There should be no issues of next-hop or sync in EBGP
>connections as they are only related to IBGP sessions
>within the AS. For EBGP sessions next-hop will always
>reflect the IP address of the router advertising the
>route whereas for IBGP next-hop will go unchanged
>within the AS. Pls post your configs. Since all your
>connections are EBGP, you should have all your BGP
>advertised routes on all three routers (if you are not
>using any filters). Also try clearing BGP sessions on
>AS3 router.
>
>Vikas
>
>--- Michelle T <mtruman@mn.mediaone.net> wrote:
>> Michael,
>>
>> Look at the routes and pay attention to the next hop
>> for each external
>> route. Can your router reach that next hop? If not,
>> BGP will not install the
>> route in the route table. Sending router can use the
>> neighbor x.x.x.x
>> next-hop-self command or you can get the route via
>> IGP if it works in your
>> topology.
>>
>>
>> ----- Original Message -----
>> From: "Michael King" <kingmi1@yahoo.com>
>> To: <ccielab@groupstudy.com>
>> Sent: Wednesday, December 27, 2000 7:21 PM
>> Subject: BGP and the route table
>>
>>
>> > What are the conditions for a route in the BGP
>> route
>> > table to make it to the ip route table?
>> >
>> > I have 3 AS's: AS1, AS2, and AS3. AS1 has EBGP
>> to
>> > AS2 and AS2 has EBGP to AS3 ( AS1-->AS2-->AS3). To
>> > further simplify, each AS has 1 router.
>> >
>> > AS1 is advertising directly connected routes to
>> AS2.
>> > AS2's BGP table and IP route table have all BGP
>> > advertised routes from AS1. AS3 only has routes
>> in
>> > BGP table and NOT IP route table. I have turned
>> off
>> > synchronization on all routers but still can't get
>> > routes in AS3's IP route table.
>> >
>> > Mike
>> >



This archive was generated by hypermail 2.1.4 : Thu Jun 13 2002 - 08:26:12 GMT-3