From: Logan, Harold (loganh@mccfl.edu)
Date: Fri Dec 20 2002 - 16:44:26 GMT-3
Chuck, do you have any idea why hard coding the router id would keep the isdn line up? This is the first I've heard of a bug like that.
I personally prefer to use the router-id command on routers that I know will eventually get virtual links, or anything else that would have another router's id in the config. That way I know I won't bork up my ospf config later on if I need to create a loopback. It also eliminates the need to consult a network diagram or another router's config when setting the virtual link up. If I know I gave router 3 an ospf id of 3.3.3.3, then I shave a few seconds off the config for my virtual links, especially if I'm also doing authentication.
The other use for the router-id command is the bug about ospf and bgp redistribution. Has anyone run into this bug before? I've read TAC documentation on it, but haven't had the chance to see it in action.
> -----Original Message-----
> From: Chuck Church [mailto:ccie8776@rochester.rr.com]
> Sent: Friday, December 20, 2002 2:04 PM
> To: Matthew Poole; ccielab@groupstudy.com
> Subject: Re: OSPF Router ID
>
>
> In the lab the default RIDs tend to be meaningful. I'd be
> leery of using
> something else, because I don't know how good the automated
> grading system
> is (if they're using it yet) at picking up on stuff like
> that. I'd avoid
> using the router-ID. I've seen it keep the ISDN up when it
> shouldn't have
> been. Not sure when/if the bug was fixed, but then again
> you're not always
> going to see recent GD code in the lab either. I'd stick
> with what they
> gave you...
>
> Chuck Church
> CCIE #8776, MCNE, MCSE
>
>
> ----- Original Message -----
> From: "Matthew Poole" <matthew.poole@blueyonder.co.uk>
> To: <ccielab@groupstudy.com>
> Sent: Friday, December 20, 2002 11:09 AM
> Subject: OSPF Router ID
>
>
> > What's the preferred method for setting router ID?
> >
> > 1. Router-ID command - never seen this before today.
> >
> http://www.cisco.com/univercd/cc/td/doc/product/software/ios12
1/121cgcr/ip_r
/
> iprprt2/1rdospf.htm#xtocid32
> 2. Loopback interface (highest IP).
>
http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121cgcr/ip_c
/
> ipcprt2/1cdospf.htm#xtocid17
>
> All config's I've seen prefer the second method.
>
> Any thoughts?
> .
.
.
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