From: Lee Donald (Lee.Donald@t-systems.co.uk)
Date: Tue Aug 17 2004 - 07:56:03 GMT-3
No your right , the access-list permits any ( all), you need to deny the
address of the BGP peers so that they don't get translated.
-----Original Message-----
From: Edi Guntoro [mailto:eguntoro@sisindosat.co.id]
Sent: 17 August 2004 11:12
To: Lee Donald; ccielab@groupstudy.com
Subject: RE: BGP adj down when activating NAT outside
Thanks Lee,
Here is the config, my understanding that the access-list will not deny
any bgp session or am I wrong ?
interface FastEthernet0/0
ip address 204.12.1.6 255.255.255.0
ip nat inside
ip router isis
duplex auto
speed auto
isis circuit-type level-2-only
!
interface FastEthernet0/1
ip address 54.1.8.6 255.255.255.0
ip nat outside
ip router isis
duplex auto
speed auto
isis circuit-type level-1
!
ip nat inside source list 1 interface FastEthernet0/1 overload
!
access-list 1 permit any
Rgds,
Edi
-----Original Message-----
From: Lee Donald [mailto:Lee.Donald@t-systems.co.uk]
Sent: Tuesday, August 17, 2004 4:33 PM
To: Edi Guntoro; ccielab@groupstudy.com
Subject: RE: BGP adj down when activating NAT outside
Because Nat changes the TCP port aswell. The access-list that NAT refers
too, alter that and deny the BGP peer in the NAT list, and that should
work.
-----Original Message-----
From: Edi Guntoro [mailto:eguntoro@sisindosat.co.id]
Sent: 17 August 2004 10:20
To: ccielab@groupstudy.com
Subject: BGP adj down when activating NAT outside
Hi all,
Just curious why when I enable nat outside to the interface connecting
to bgp speaker the the adjancy won't up. Is there any correlation ? Any
advice will be appreciated.
Thanks
Edi
Rack1R6#sh ip bgp sum
BGP router identifier 150.1.6.6, local AS number 100
BGP table version is 14, main routing table version 14
13 network entries using 1313 bytes of memory
23 path entries using 1104 bytes of memory
8 BGP path attribute entries using 480 bytes of memory
1 BGP rrinfo entries using 24 bytes of memory
3 BGP AS-PATH entries using 72 bytes of memory
1 BGP community entries using 24 bytes of memory
0 BGP route-map cache entries using 0 bytes of memory
0 BGP filter-list cache entries using 0 bytes of memory
BGP using 3017 total bytes of memory
BGP activity 13/0 prefixes, 23/0 paths, scan interval 60 secs
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down
State/PfxRcd
54.1.8.254 4 54 0 3 0 0 0 never
OpenSent ---------- with nat enable
150.1.3.3 4 100 14 13 14 0 0 00:05:44
13
204.12.1.254 4 54 14 10 14 0 0 00:05:54
10
Rack1R6(config-if)#no ip nat outside
Rack1R6(config-if)#exi
Rack1R6(config)#exi
Rack1R6#clea ip bgp 54.1.8.254
Rack1R6#
*Aug 16 14:13:36.083: %BGP-5-ADJCHANGE: neighbor 54.1.8.254 Up
Rack1R6#
Rack1R6#sh ip bgp sum
BGP router identifier 150.1.6.6, local AS number 100
BGP table version is 14, main routing table version 14
13 network entries using 1313 bytes of memory
33 path entries using 1584 bytes of memory
10 BGP path attribute entries using 600 bytes of memory
1 BGP rrinfo entries using 24 bytes of memory
3 BGP AS-PATH entries using 72 bytes of memory
1 BGP community entries using 24 bytes of memory
0 BGP route-map cache entries using 0 bytes of memory
0 BGP filter-list cache entries using 0 bytes of memory
BGP using 3617 total bytes of memory
BGP activity 13/0 prefixes, 33/0 paths, scan interval 60 secs
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down
State/PfxRcd
54.1.8.254 4 54 9 13 14 0 0 00:01:38
10
150.1.3.3 4 100 17 16 14 0 0 00:08:42
13
204.12.1.254 4 54 17 13 14 0 0 00:08:52
10
Rack1R6#conf t
Enter configuration commands, one per line. End with CNTL/Z.
Rack1R6(config)#
Rack1R6(config)#int f0/1
Rack1R6(config-if)#ip nat
Rack1R6(config-if)#ip nat ou
Rack1R6(config-if)#ip nat outside
Rack1R6(config-if)#
*Aug 16 14:15:37.311: %BGP-5-ADJCHANGE: neighbor 54.1.8.254 Down Peer
closed the session
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