From: Wu, Jiang (wujiang@xxxxxxxxx)
Date: Sat Dec 02 2000 - 06:33:23 GMT-3
George,
Chuck and Erick are right. As I know till now, the best way is to re-configure
OSPF. i.e. Copy the OSPF configuration lines to the clipper board, no router os
pf then paste.
Regards,
Wu
----- Original Message -----
From: George Zhang <gyzhang@bigfoot.com>
To: Chuck Larrieu <chuck@cl.cncdsl.com>
Cc: Wu, Jiang <wujiang@bj163.com>; <ccielab@groupstudy.com>
Sent: Saturday, December 02, 2000 3:46 PM
Subject: Re: OSPF Lab - DR behaviour with loopbacks WAS: RE: question about loo
pback interfaces
> If you configured OSPF before you configured an loop back interface, the RID
will be
> the ip address of a physical interface. Then, after you configuring an loopb
ack
> interface, you can do shut/no shut on the physical interface that has the RID
as its
> ip address. By doing so, the RID will be changed to the ip address of the lo
opback
> interface. At least, it worked for me the other day (with IOS 11.3). Correc
t me if I
> am wrong.
>
> George Zhang
>
> Chuck Larrieu wrote:
>
> > Jiang, I'm running IOS 12.1 in my lab. Clear IP OSPF process does not clear
> > out bad or old RID information
> >
> > Various experiments over the last couple of days, both as a result of this
> > thread and private conversations, led to my discovery that blowing out the
> > OSPF configuration completely, then rebuilding it, will remove the bad
> > information ( such as a bad neighboring RID ). And so will reloading the
> > router. But once RID's are learned, at least in what I have seen so far, it
> > is hell getting "rid" of them.
> >
> > Chuck
> >
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of W
u,
> > Jiang
> > Sent: Friday, December 01, 2000 9:00 PM
> > To: ccielab@groupstudy.com
> > Subject: Re: OSPF Lab - DR behaviour with loopbacks WAS: RE: questio
n about
> > loopback interfaces
> >
> > In some ios versions (maybe 12.0 GD), you can use "clear ip ospf process"
> > command to restart OSPF.
> >
> > Wu
> >
> > ----- Original Message -----
> > From: Tony Olzak <aolzak@buckeye-express.com>
> > To: <erickbe@yahoo.com>; Chuck Larrieu <chuck@cl.cncdsl.com>; Louie Belt
> > <louieb@netmatter.com>; 'CCIE_Lab Groupstudy List' <ccielab@groupstudy.com>
;
> > <cisco@groupstudy.com>
> > Sent: Saturday, December 02, 2000 5:16 AM
> > Subject: Re: OSPF Lab - DR behaviour with loopbacks WAS: RE: question about
> > loopback interfaces
> >
> > > I usually just reboot routers on the fly and work on something else while
> > > that router is rebooting.
> > >
> > >
> > > Tony
> > >
> > > ----- Original Message -----
> > > From: "Erick B." <erickbe@yahoo.com>
> > > To: "Tony Olzak" <aolzak@buckeye-express.com>; "Chuck Larrieu"
> > > <chuck@cl.cncdsl.com>; "Louie Belt" <louieb@netmatter.com>; "'CCIE_Lab
> > > Groupstudy List'" <ccielab@groupstudy.com>; <cisco@groupstudy.com>
> > > Sent: Friday, December 01, 2000 3:35 PM
> > > Subject: Re: OSPF Lab - DR behaviour with loopbacks WAS: RE: question
> > about
> > > loopback interfaces
> > >
> > >
> > > > If you remove the router ospf configuration and paste
> > > > it back, OSPF will restart with a new router ID if you
> > > > have a new high IP address. You can only do this in a
> > > > test/non-production network environment though. I've
> > > > done this before in my labs because it is faster then
> > > > waiting for the router to reboot.
> > > >
> > > > > And you are right, the RID doesn't change at all
> > > > > without rebooting the
> > > > > router. But, what do most techs do when a link is
> > > > > having problems? Reboot
> > > > > the routers. Now your RID will change.
> > > > >
> > > > > Tony
> > > >
> > > >
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