From: Larson, Chris (CLarson@usaid.gov)
Date: Wed Mar 26 2003 - 14:35:42 GMT-3
Actually, there is a little more to it then that depending on where it is
applied and if redistribution is occuring etc.
With ospf routers on a shared segment using an all 0.0.0.0 wildcard mask
and redistributing, the forwarding address for an advertised network will be
0.0.0.0 from the advertising router meaning it will be the gateway of choice
for that network even if it is not the closest router to the destination.
There is a good document that explains this behaviour on the netmasters site
in their technical library. Here is the link, watch the wrap.
http://www.netmasterclass.net/site/articles/Forwarding%20behavior%20of%20IGP
%20routing%20protocols%20on%20the%20broadcast%20part%20I.pdf
Or you can go to the netmasters site, look under technical library and read
the PDF file entitled "Forwarding Behaviour of IGP routing protocols on the
Broadcast Part 1"
> -----Original Message-----
> From: Tim Fletcher [SMTP:tim@fletchmail.net]
> Sent: Wednesday, March 26, 2003 10:35 AM
> To: Angelo De Guzman; CCIELAB@groupstudy.com
> Subject: Re: Defining OSPF Area
>
> Angelo,
>
> It is just 2 ways of representing it on the router, and is strictly a
> mater
> of personal preference. In fact you can configure two routers using
> different formats on each one, and as long as the numbers match, it will
> work. For example a router configured with area 1000 will work just fine
> with a router configured with area 0.0.0.3.232.
>
> Sometimes a dotted notation will be used in a hub and spoke topology,
> where
> each spoke is in a separate area. To simplify troubleshooting, you can use
>
> the same area number as the block of IPs assigned to that spoke.
>
> -Tim Fletcher
>
> At 10:25 PM 3/25/2003 -0800, Angelo De Guzman wrote:
> >Hi To All,
> > What is the best practice in computer the OSPF
> >area. Use 0 or 0.0.0.0. All routers are Cisco. Please
> >enumerate the advantage and desadvantage of using
> >each. Specially in troubleshooting and configuration
> >wise?
> >Thanks in Advance,
> >Angelo
> >
> >__________________________________________________
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