From: Chuck Larrieu (chuck@xxxxxxxxxxxxx)
Date: Thu Jan 25 2001 - 03:29:53 GMT-3
Smarter people than I have a diversity of opinion here. A couple of random
thoughts:
Using 0.0.0.0 255.255.255.255 is quick and dirty. It places all the
interfaces you want into the process, and in some cases some that you don't
want. Definitely NOT recommended for the Lab, where you will undoubtedly be
told not to advertise something or other
Using a.b.c.d 0.0.0.0 serves to place only the specific interface into the
process. Specific, clean, easy to troubleshoot, and in any environment is
supposed to make troubleshooting easier. Everyone, how many times have you
done things this way, found something or other wasn't working, and it took a
while for your sore eyes to see you made a mistake in the a.b.c.d portion?
In a time sensitive environment like the Lab this still might be the easiest
thing to troubleshot
a.b.c.d inverse mask easiest one to make a mistake with, and hardest one to
troubleshoot, IMHO. Especially in an VLSM environment.
BTW, just for fun consider using the interface address as the mask. E.g.
192.168.7.47 192.168.7.47 area 1 it is indeed a legitimate mask, as it
places the desired interface into OSPF. Just remember the law of unintended
consequences :->
Question to all - do you find yourselves slipping back and forth between
inverse mask / wildcard mask / subnet mask usage?
I find myself more than I care entering 0.0.0.0 as a subnet mask and
255.255.255.240 as a wildcard mask. Is this a stage I am going through as I
pound routers more and more in my prep?
Chuck
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of Les
Hardin
Sent: Wednesday, January 24, 2001 10:01 PM
To: ccielab@groupstudy.com
Subject: OSPF Config Styles
All,
I'd like to engage in a religious discussion for a moment -- OPSF
configuration styles.
I know that there are at least 2 schools of thought out there regarding
OSPF config.
Under router ospf 1:
1) Use network command with classfull IP addresses
2) Use network command with 32-bit interface address, ensuring that only
the desired interface is activated for OSPF, then perhaps using area range
to summarize.
I'd like to hear from a few folks as to what their preference is and
why. I'm interested as to where the majority of folks sit on this
topic. Thanks for your inputs.
Les
yada yada yada certs
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