From: 劉博仁 (johnson_liu@corp.giga.net.tw)
Date: Thu Jun 05 2003 - 11:33:56 GMT-3
How about this :
prefix-list XXX seq 5 permit 192.168.0.0/21 ge 24 le 24
-- Johnson Liu Senior Network Engineer Gigamedia Limited, Inc. CCNP/CCDP/CCIE#11440-----Original Message----- From: Ram Shummoogum [mailto:rshummoo@ca.ibm.com] Sent: 2003/6/5 [f f e] d8 e 08:01 To: scotsman@rediffmail.com Cc: ccielab@groupstudy.com Subject: Re: Suggestion on BGP Prefix-list
Let me give it a shot. prefix-list XXX seq 5 deny 192.168.20.0/23 ge 24 le 24 prefix-list XXX seq 10 permit 0.0.0.0/0 le 32 RAM "Scot Peter" <scotsman@rediffmail.com>@groupstudy.com on 06/05/2003 06:35:14 AM Please respond to "Scot Peter" <scotsman@rediffmail.com> Sent by: nobody@groupstudy.com To: ccielab@groupstudy.com cc: Subject: Suggestion on BGP Prefix-list Hello Group, I have a scenario like this AS254--(EBGP)----R4(AS1)---(IBGP)---R2(AS1) AS 254 is advertising five routes to R4 in the range... 192.168.1.0/24 192.168.2.0/24 192.168.5.0/24 192.168.20.0/24 192.168.21.0/24 The requirement is to allow only 192.168.1.0/24, 192.168.2.0/24 and 192.168.5.0/24 ONLY; and filter all other routes. DO NOT use any access-lists / distribute lists; use only prefix lists with minimum number of lines. I have configured the below on R4; but not sure on configuring minimum number of lines. Please advice. Router bgp 1 neighbor 10.1.1.1 remot-as 254 neighbor 10.1.1.1 prefix-list XXX in prefix-list XXX seq 5 permit 192.168.1.0/24 prefix-list XXX seq 10 permit 192.168.2.0/24 prefix-list XXX seq 15 permit 192.168.5.0/24 Is this config is OK with the minimum number of lines? Thanks in advance SP ___________________________________________________ Get email that means BUSINESS! me @ mycompany.com. Just Rs.1499/year. To start, click http://www.rediffmailpro.com
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