From: yuen me (yuen_me@xxxxxxxxxxx)
Date: Sun Feb 10 2002 - 02:46:14 GMT-3
building ospf adjacencies over NAT can only be done with careful planning. I
recall that you have to make sure access-list 1 does not include the OSPF
router ID
make sure you have neighbor command in both ospf so that the hello and
adjacecies establishment use unicast command, not multicast.
Yuenme
>From: "Yigit Zorlu" <alec_cisco@yahoo.com>
>Reply-To: "Yigit Zorlu" <alec_cisco@yahoo.com>
>To: <ccielab@groupstudy.com>
>Subject: Lab 18 NAT
>Date: Sat, 9 Feb 2002 14:45:01 +0200
>
>Hi group,
>
>I almost finished Lab 18 except this tiny problem. R1 has a serial
>connection over FR with R2 (200.200.200.2) . They can ping each other they
>can exchange IPX routes but they can not establish an OSPF neighborship and
>BGP neighborship. I found the reason but could not get the logic behind it.
>When I remove ip nat outside from interface s0/0.3 problem disappears all
>peer establishments become OK. But why ? I need this NAT thing on that
>subinterface . I think I am missing a point.
>
>Any ideas ?
>
>
>version 12.1
>
>!
>interface Loopback0
> ip address 15.15.1.1 255.255.255.0
> ip ospf network point-to-point
> ipx network 1000
>!
>interface Ethernet0/0
> no ip address
>!
>interface Serial0/0
> no ip address
> encapsulation frame-relay
> custom-queue-list 1
> no frame-relay inverse-arp
>!
>interface Serial0/0.1 multipoint
>!
>interface Serial0/0.2 point-to-point
> ip ospf network point-to-multipoint
>!
>interface Serial0/0.3 point-to-point
> ip address 200.200.200.1 255.255.255.0
> ip nat outside
> ip ospf network point-to-point
> ipx network 200
> frame-relay interface-dlci 102
>!
>interface Serial0/0.4 multipoint
> ip address 11.1.11.1 255.255.255.0
> ip nat inside
> ip ospf network point-to-multipoint
> ipx network 1401
> frame-relay map ipx 1401.0002.fd69.0281 109 broadcast
> frame-relay map ip 11.1.11.3 109 broadcast
> frame-relay map ip 11.1.11.14 109 broadcast
> frame-relay map ipx 1401.0002.fd68.ebc1 109 broadcast
>!
>interface Ethernet0/1
> ip address 10.1.1.1 255.255.255.0
>!
>router ospf 1
> log-adjacency-changes
> network 11.1.11.0 0.0.0.255 area 0
> network 15.15.1.0 0.0.0.255 area 0
> network 200.200.200.0 0.0.0.255 area 20
>!
>router bgp 100
> bgp log-neighbor-changes
> neighbor 11.1.12.194 remote-as 100
> neighbor 11.1.12.194 default-originate
> neighbor 200.200.200.2 remote-as 200
> no auto-summary
>!
>ip nat inside source list 1 interface Serial0/0.3 overload
>ip classless
>ip http server
>
>
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