From: John Matus (John.Matus@tokiom.com)
Date: Wed Nov 16 2005 - 19:40:28 GMT-3
ok,
this has always gotten me and i still don't understand why
lets say that you want to deny all routes (in rip) coming in w/ an even
second octet. when i look @ IE's solution guide, they show an offset list
with an ACL attached that is:
access-list 1 permit 0.0.0.0 255.254.255.255 ( the stipulation
is that the acl can only be 1 line), so this is supposed to say, i'm
assuming "permit odd routes"
but.....
from my understanding, if you have a 0 in the octet you are trying to
filter, then the octet is going to be even, and with a mask of 254, you are
going to be matching the 1's column, so it would seem to me that:
permit 0.0.0.0 255.254.255.255 would actually PERMIT all even routes
rather than denying them (my solution to the problem was "permit 0.1.0.0
255.254.255.255" which i believed would permit all odd routes...........but
it seems that i am mistaken somehow........
what am i not getting??
Regards,
John D. Matus
Technical Support / PAS
Fujitsu Consulting
626-568-7716
John.Matus@tokiom.com
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