From: Igor M. (imanassypov@rogers.com)
Date: Mon Sep 15 2008 - 15:36:58 ART
your bridge is misconfigured on SW2:
interface Vlan23
ip address 173.1.23.8 255.255.255.0
ip ospf mtu-ignore
bridge-group 1
Your bvi interface is supposed to have that ip address, not vlan 23...
take off the ip from that vlan int, and do:
bridg irb
bridge 1 protocol ieee
bridge 1 route ip
int bvi 1
ip add 173.1.23.8 255.255.255.0
ip ospf mtu-ignore
----------------------
I.M., M.Eng. P.Eng.
Network Architect
CI Investments
----------------------
--- On Mon, 9/15/08, Bogdan Sass <bogdan.sass@catc.ro> wrote:
From: Bogdan Sass <bogdan.sass@catc.ro>
Subject: Re: IEWB Dynamips, v4.1, Lab 17, Task 4.3
To: "Cisco certification" <ccielab@groupstudy.com>
Received: Monday, September 15, 2008, 2:18 PM
Igor M. wrote:
> can you please post the pertinent config between at least two
> faulty-neighbor nodes?
>
Here they are (the network on VLAN 23 is 173.1.23.0/24):
! =============R3=============
Rack1R3#sh run | sec ospf
router ospf 1
router-id 150.1.3.3
log-adjacency-changes
network 150.1.3.3 0.0.0.0 area 0
network 173.1.13.3 0.0.0.0 area 0
network 173.1.23.3 0.0.0.0 area 23
network 173.1.32.3 0.0.0.0 area 0
network 173.1.137.3 0.0.0.0 area 137
Rack1R3#sh run int e0/1
Building configuration...
Current configuration : 99 bytes
!
interface Ethernet0/1
ip address 173.1.23.3 255.255.255.0
ip ospf mtu-ignore
full-duplex
end
! =============SW2=============
Rack1SW2#sh run | sec ospf
router ospf 1
router-id 150.1.8.8
log-adjacency-changes
redistribute connected subnets route-map CONN2OSPF
network 173.1.8.8 0.0.0.0 area 23
network 173.1.23.8 0.0.0.0 area 23
Rack1SW2#sh run int vlan23
Building configuration...
Current configuration : 97 bytes
!
interface Vlan23
ip address 173.1.23.8 255.255.255.0
ip ospf mtu-ignore
bridge-group 1
end
! =============R2=============
Rack1R2#sh run | sec ospf
router ospf 1
router-id 150.1.2.2
log-adjacency-changes
network 150.1.2.2 0.0.0.0 area 0
network 173.1.23.2 0.0.0.0 area 23
network 173.1.32.2 0.0.0.0 area 0
network 173.1.125.2 0.0.0.0 area 0
Rack1R2#sh run int f0/0
Building configuration...
Current configuration : 115 bytes
!
interface FastEthernet0/0
ip address 173.1.23.2 255.255.255.0
ip ospf mtu-ignore
duplex auto
speed auto
end
Rack1R2#sh ip ospf nei
Neighbor ID Pri State Dead Time Address Interface
150.1.5.5 100 FULL/DR 00:01:56 173.1.125.5 Serial1/0
150.1.3.3 0 FULL/ - 00:00:38 173.1.32.3 Serial1/1
150.1.3.3 1 FULL/DROTHER 00:00:32 173.1.23.3
FastEthernet0/0
150.1.8.8 1 EXCHANGE/DR 00:00:38 173.1.23.8
FastEthernet0/0
[ Notice that R2 and R3 establish an adjacency - the problem is
between either of them and SW2 ]
> ----------------------
> I.M., M.Eng. P.Eng.
> Network Architect
> CI Investments
> ----------------------
>
> --- On *Mon, 9/15/08, Bogdan Sass /<bogdan.sass@catc.ro>/* wrote:
>
> From: Bogdan Sass <bogdan.sass@catc.ro>
> Subject: IEWB Dynamips, v4.1, Lab 17, Task 4.3
> To: "Cisco certification" <ccielab@groupstudy.com>
> Received: Monday, September 15, 2008, 2:06 PM
>
> I'm trying to configure a "very simple :P " OSPF
area, between
> R2,
> R3, and SW2 (all connected to the same ethernet segment: R2 via f0/0,
> R3 via e0/1, and SW2 via VLAN23).
>
> However, the adjacency with the switch gets stuck in the
> EXCHANGE/EXSTART stage. I know it looks like an MTU mismatch, but...
all
> interfaces show an MTU of 1500 bytes, and the command "ip ospf
> mtu-ignore" does not solve the problem.
>
> [ Later edit: the switch interface is configured as part of a
> vlan-bridge group, as
> per another task. If I remove the bridge-group
> command from the interface, the neighbors immediately go to FULL. As
> soon as I put the command back, they get stuck in EXSTART...
> The problem is already on the IE forum (
>
http://forum.internetworkexpert.com/ubbthreads.php/ubb/showflat/Number/23481/page/1#Post23481
>
> ) , but there is no clear answer (seems to work for some people, not
> work for others).
> ]
>
> *Mar 1 00:29:40.807: OSPF: Send DBD to 150.1.2.2 on Vlan23 seq 0x10E2
> opt 0x52 flag 0x7 len 32
> *Mar 1 00:29:40.811: OSPF: Retransmitting DBD to 150.1.2.2 on Vlan23
[1]
> Rack1SW2#
> *Mar 1 00:29:43.083: OSPF: Send DBD to 150.1.3.3 on Vlan23 seq 0x243D
> opt 0x52 flag 0x7 len 32
> *Mar 1 00:29:43.087: OSPF: Retransmitting DBD to 150.1.3.3 on Vlan23
[1]
> Rack1SW2#
> *Mar 1 00:29:45.811: OSPF: Send DBD to 150.1.2.2 on Vlan23 seq 0x10E2
> opt 0x52 flag 0x7 len 32
> *Mar 1 00:29:45.815: OSPF:
> Retransmitting DBD to 150.1.2.2 on Vlan23 [2]
> Rack1SW2#
> *Mar 1 00:29:48.087: OSPF: Send DBD to 150.1.3.3 on Vlan23 seq 0x243D
> opt 0x52 flag 0x7 len 32
> *Mar 1 00:29:48.091: OSPF: Retransmitting DBD to 150.1.3.3 on Vlan23
[2]
> Rack1SW2#
> *Mar 1 00:29:50.815: OSPF: Send DBD to 150.1.2.2 on Vlan23 seq 0x10E2
> opt 0x52 flag 0x7 len 32
> *Mar 1 00:29:50.819: OSPF: Retransmitting DBD to 150.1.2.2 on Vlan23
[3]
> Rack1SW2#
> *Mar 1 00:29:53.091: OSPF: Send DBD to 150.1.3.3 on Vlan23 seq 0x243D
> opt 0x52 flag 0x7 len 32
> *Mar 1 00:29:53.095: OSPF: Retransmitting DBD to 150.1.3.3 on Vlan23
[3]
> Rack1SW2#
> *Mar 1 00:29:55.819: OSPF: Send DBD to 150.1.2.2 on Vlan23 seq 0x10E2
> opt 0x52 flag 0x7 len 32
> *Mar 1 00:29:55.823: OSPF: Retransmitting DBD to 150.1.2.2 on Vlan23
[4]
>
> Rack1SW2#sh ip ospf nei
>
> Neighbor ID Pri State Dead Time Address
Interface
> 150.1.2.2 1
> EXSTART/DROTHER 00:00:38 173.1.23.2 Vlan23
> 150.1.3.3 1 EXSTART/BDR 00:00:30 173.1.23.3
Vlan23
>
> Does anybody know what I should do to make both tasks work?
>
> Thank you,
>
> --
> Bogdan Sass
> CCAI,CCNP,CCSP,JNCIA-ER
> Information Systems Security Professional
> "Curiosity was framed - ignorance killed the cat"
>
>
> Blogs and organic groups at http://www.ccie.net
>
>
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