From: Matt Smith (matt-n-donna@xxxxxxxxxxxxxx)
Date: Wed Nov 07 2001 - 22:27:18 GMT-3
Your not missing anything. The 0.0.0.0 mask is just a lazy way of doing
it..or...a way of eliminating the possibility of human error..which ever you
prefer. All the 0.0.0.0 mask does is tell OSPF to use the mask it finds on
the interface with that exact host address. Bearing in mind that if you saw
something like 'use the specific mask' you would not use the 0.0.0.0 either
way works fine. At least that is my take
Matt
----- Original Message -----
From: "Dennis #6" <vacant@home.com>
To: "CCIE Groupstudy" <ccielab@groupstudy.com>
Sent: Wednesday, November 07, 2001 12:04 PM
Subject: CCBootCamp 5 OSPF over frame question
> I noticed on the CCBootCamp lab 5 solution that the wildcard mask on each
> router for the point-to-multipoint frame connections is 0.0.0.0 (see
below).
> Is there a good reason for using this mask as opposed to 0.0.0.255 (it's a
> /24 subnet)? When is it best to use 0.0.0.0 versus 0.0.0.255. I thought
it
> was normal to use the inverse mask that corresponds to the subnet mask on
> that interface. What am I missing?
>
>
> router ospf 1
> redistribute igrp 1 metric 20 metric-type 1 subnets
> network 172.168.100.5 0.0.0.0 area 10 !point to multipoint frame
connection
> network 137.20.20.0 0.0.0.255 area 0
> area 10 virtual-link 172.168.30.97
> area 10 virtual-link 172.168.100.6
>
>
> Thanks,
>
> Dennis #6
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