How can I permit or deny even and odd subnets?

From: gigi.ccie@gmail.com
Date: Sun May 21 2006 - 12:56:22 ART

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Friends,

How can I permit or deny even or odd subnets? I mean how to know when to use one over the other?

If I have a requirement to allow even subnets from 172.16.0.0? Can I just permit the evens? Would I be wrong if I denied the odd subnets?

I think I would need something like this

access-list 101 permit ip 172.16.0.0 0.0.254.255
access-list 101 deny any any

access-list 101 deny ip 172.16.0.0 0.0.1.255
access-list 101 permit any any

access-list 101 permit ip 172.16.0.0 0.0.254.0
access-list deny any any

access-list 101 deny ip 172.16.0.0 0.0.1.0
access-list permit any any

Does this look right?

Next message: gigi.ccie@gmail.com: "Re: RE: OSPF Stubs?"
Previous message: Plank, Jason: "RE: Summary vs. Area Range?"
Next in thread: Marvin Greenlee: "Re: How can I permit or deny even and odd subnets?"
Maybe reply: Marvin Greenlee: "Re: How can I permit or deny even and odd subnets?"
Maybe reply: Quetta Walla: "Re: How can I permit or deny even and odd subnets?"
Maybe reply: Jeffrey Fry: "RE: How can I permit or deny even and odd subnets?"
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