From: Mosley, Arthur (Arthur.Mosley@xxxxxxxx)
Date: Thu Apr 20 2000 - 15:02:16 GMT-3
Don't waste anytime calculating masks. Just use 0.0.0.0 for specific
interfaces through your configuration. You have more important things to
worry about. If does not buy you anything by fooling around with the mask.
Actually, with 0.0.0.0 it give you more control. Remember always check to
see what interfaces are part of OSPF by using the sh ip ospf int after you
configure it. It easy to make stupid mistakes.
After learning about the 0.0.0.0 it greatly reduced the time it took to
setup my OSPF configuration. It's easy as pie! All you have to worry about
is OSPF network type mismatch. Even that's easy to fix. You should be able
to do frame relay and OSPF(learn when and how to use virtual links) in your
sleep.
Art
-----Original Message-----
From: Aaron DuShey
To: 'Stanley Seow'; 'CCIELAB'
Sent: 4/21/00 11:18 AM
Subject: RE: OSPF reverse mask
nothing. When you use 0.0.0.0 as the reverse mask, it specifies the
interface to use/assign in an area. I like this better as you clearly
know
when an interface is in an area. But if you have multiple interfaces you
need to assign to a specific area, using a wildcard mask can somewhat
simplify (less statements) the process.
If you did
net 172.16.1.0 0.0.0.255 area 0
net 172.16.5.0 0.0.0.255 area 1
any interface leading with 172.16.1.x would be assigned to area 0
same with area 1
Aaron DuShey
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Stanley Seow
Sent: Thursday, April 20, 2000 6:42 AM
To: CCIELAB
Subject: OSPF reverse mask
A quick question....
For example, if the OSPF area X have a /22 bit mask...for the
configuration
on the router, can I use the specific interface IP address (host mask )
network 172.16.1.1 0.0.0.0 area 0
network 172.16.5.1 0.0.0.0 area 1
instead of calculating the reverse mask for odd subnet bit like /22 /25
/26
/27.
What is the differences betwen the above two reverse mask ??
Stanley
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