RE: Reflexive Lists and BGP

From: Brian Dennis (bdennis@internetworkexpert.com)
Date: Thu Sep 04 2003 - 17:42:02 GMT-3


That is because BGP isn't its own IP protocol like EIGRP (IP Protocol
88) or OSPF (IP Protocol 89) are. BGP uses TCP (IP Protocol 6) for
transport. Your ACL should look like this:

ip access-list extended ibf
 permit tcp any any eq bgp
 permit tcp any eq bgp any
 evaluate tcptraffic

Brian Dennis, CCIE #2210 (R&S/ISP-Dial/Security)
bdennis@internetworkexpert.com
Toll Free: 877-334-8987
Direct: 775-745-6404 (Outside the US and Canada)
Internetwork Expert, Inc.
http://www.InternetworkExpert.com

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Charles T. Alexander
Sent: Thursday, September 04, 2003 1:27 PM
To: ccielab@groupstudy.com
Subject: Reflexive Lists and BGP

Can't add
   permit bgp any any
to access list below along with ospf. Running 12.2 on a 2500. Cisco
example show it, but it doesn't seem to be an option.

interface Ethernet0
 ip address 172.29.12.2 255.255.255.192
 ip access-group ibf in
 ip access-group obf out

ip access-list extended ibf
 permit ospf any any
 evaluate tcptraffic
ip access-list extended obf
 permit tcp any any reflect tcptraffic
 permit ip any any



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