From: Frank CCIE (frankccie@gmail.com)
Date: Sat Dec 08 2007 - 16:56:08 ART
HI,
I add router-id in ospf process.
router ospf 1
router-id 172.16.102.1
... ...
The symptom is still there. It did not work. Any other thought?
Thanks
Frank
On Dec 8, 2007 2:33 PM, srinivas pv <vsrinivas.paturi@gmail.com> wrote:
> Hi,
>
> In the following configs, there are chances that after reloading of
> routers, 172,16.101.1 may not become router-id. For ex. some other higher
> loopback interface ip address can become router id. To avoid this, need to
> configure router-id under OSPF processes.
>
> router ospf 1
> log-adjacency-changes
> area 12 virtual-link 172.16.101.1
>
>
> Thanks,
> Srinivas
>
> On Dec 9, 2007 12:47 AM, srinivas pv < vsrinivas.paturi@gmail.com> wrote:
>
> > 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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