From: srinivas pv (vsrinivas.paturi@gmail.com)
Date: Sat Dec 08 2007 - 16:17:30 ART
Hi Frank,
I think the problem is due to missing of 'router-id' under OSPF process. Try
configuring it and check once.
Thanks,
Srinivas
On Dec 9, 2007 12:27 AM, Frank CCIE <frankccie@gmail.com> wrote:
> Hi, Experts,
>
> In my lab scenario, OSPF network type NON-Broadcast (NBMA) is set in
> Ethernet port to fulfill the lab requirement and "neighbor" statement is
> added in OSPF process. The configuration runs well as expected. I save
> the
> config and reload.
>
> The "neighbor" statement is lost in running-config during the router
> reload.
> Consequently, no neighbor is created for the NBMA netowrk. (Please see the
> error msg in reloading below). The "neighbor" statement is still in
> startup-config. Then I copy startup-conf to running-config after loading,
> IOS does not show any error and everything is normal.
>
> After trouble-shooting, I found "area virtual-link" causes the problem. If
> the "area virtual-link" is removed, the reload procedure is normal. When
> "area virtual-link" is added, the "neighbor" statement always lost due to
> IOS misjudgement - the network is NOT a NBMA.
>
> I do not know it is my configuration problem, or a race condition during
> the
> load? The router is 3640 and IOS version is 12.4. Could you shine a
> light?
>
>
> Thank you very much.
>
> Frank
>
> ================================
> interface FastEthernet0/0.10
> description This port connects to Area 12. It is a NBMA netwok
> encapsulation isl 10
> ip address 172.16.25.2 255.255.255.0
> no ip redirects
> *ip ospf network non-broadcast*
>
>
> router ospf 1
> log-adjacency-changes
> * area 12 virtual-link 172.16.101.1
> * network 172.16.12.0 0.0.0.255 area 12
> network 172.16.25.0 0.0.0.255 area 10
> * neighbor 172.16.25.7
> *
> #sh version
> Cisco IOS Software, 3600 Software (C3640-JK9O3S-M), Version 12.4(12),
> RELEASE SOFTWARE (fc1)
>
> /* Reload and IOS shows an error message during reload*/
> # reload
> ... ...
> Processor board ID 15663547
> R4700 CPU at 100MHz, Implementation 33, Rev 1.0
> 1 FastEthernet interface
> 4 Serial interfaces
> DRAM configuration is 64 bits wide with parity disabled.
> 125K bytes of NVRAM.
> 32768K bytes of processor board System flash (Read/Write)
> *OSPF: Neighbor command is allowed only on NBMA and point-to-multipoint
> networks
> *
> Press RETURN to get started!
> ... ....
>
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