From: ElleJf\(Yahoo\) (ellejf@xxxxxxxxx)
Date: Tue Jun 12 2001 - 11:43:08 GMT-3
I would be surprised if /19 mask can work. IGRP does not support VLSM, so that
you can use 192.168.33.0/19 which is a classless subnet. This ip address bel
ong to class C, so the mask should be /24. In IGRP routing update packets, onl
y 192.168.33.0 will be recorded (In fact, 192.168.33, 3 octets.) There is no i
nfo that you can know what the mask will be.
The only way it would work is that router use locally configured subnet mask on
interface, in this example, /19 as mask. But it doesn't make sense. Can you
provide your config and network diagram?
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of louie ko
uncar
Sent: Tuesday, June 12, 2001 1:18 PM
To: 'Carolyn Camarda'; 'GroupStudy'
Subject: RE: IP Addressing & IGRP Question
Well,
I just did a test to see if this is an issue, everything worked just
fine using 192.168.33.1/19 on R1 and 192.168.33.2/19 on R2....
Please post your full configs so I can look for issues....
Thanks
Louie Kouncar
UUNET
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Carolyn Camarda
Sent: Monday, June 11, 2001 11:21 PM
To: GroupStudy
Subject: IP Addressing & IGRP Question
I'm having a mental block with some IGRP configuration, I would
appreciate a
little nudge. I have my router e0 interface set up with the IP address
of
192.168.33.1/19. I have an IGRP network statement of 192.168.33.0.
With
this I do not get IGRP to start up on the E0 interface. I tried the
network
statement of 192.168.32.0 thinking that it may be wanting the VLSM
network
address. None the less I can not get IGRP to fire up.
If I use a class a (10.) or class b (172.16.) address with the /19
mask, I
don't have a problem. When I change the 192 IP address on e0 to a
longer
mask, such as /30 it works fine. My code version is 12.0.5T. I have ip
classless defined on the 2500 router
Is there something with regards to IGRP when the mask can't be shorter
than
the classful boundary to which the address belongs. Or what am I doing
wrong?
Any help would be appreciated.
Carolyn
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