From: Mahmud, Yasser (YMahmud@Solutions.UK.ATT.com)
Date: Wed Jan 08 2003 - 16:14:08 GMT-3
If I've interpreted it correctly
On R3 use the aggregate address command
aggregate-address 122.160.0.0 255.224.0.0
as not allowed to use the summary-only keyword, and can't supress any routes
so would use route-maps on neighbor routers.
< route-map in >on R1 &R2 and filter the specifics using extended
access-list to avoid using all the specifics indiviually
access-list 101 deny ip 192.160.0.0 0.31.255.255 host 255.255.255.0
access-list 101 permit ip any any
on r4 in filter the summary coming back in.
Yasser
> -----Original Message-----
> From: Evgeny Tantsura [SMTP:ivgen@castel.nl]
> Sent: Wednesday, January 08, 2003 2:11 PM
> To: ccielab@groupstudy.com
> Subject: BGP summary
>
> AS1 | AS 2
> R1-----\ |
> R2-----R3|-----R4 BGP - 122.168.1.0 - 122.157.10.0
> |
> |
>
> R3 receives 10 /24 networs from R4
>
> R1 and R2 should receive only 1 summary route, not /16
> Summary word can't be used.
>
> Routes on R3 can't be suppressed.
>
>
> With kind regards/ met vriendelijke groeten,
> ------------------------------------------------
> E. Tantsura
> Network Developer
> Essent Kabelcom N.V.
> Dr.van Deenweg 84
> 8025BN Zwolle, The Netherlands
> Tel: +31-(0)38-850-7642
> Fax: +31-(0)38-850-7410
> Mob: +31-(0)6-290-80458
> ------------------------------------------------
.
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