Re: Prefix list vs Access list - same?

access-list 10 permit 192.168.0.0
This should means the host route, /32

2009/6/2 Ryan West <rwest_at_zyedge.com>

> Hello,
>
> Hey fellows, a simple and direct question:
>
> Is there any difference that can be considered wrong in lab for these
> sentences below?
>
> 1- ip prefix-list 10 permit 192.168.0.0/24 le 32 <-- allows 192.168.0.0
> and every possible subnet combination from /24 to /32
> 2- ip prefix-listB 10 permit 192.168.0.0/24 <-- allows just
> 192.168.0.0/24
> 3- access-list 10 permit 192.168.0.0 <-- in a routing process, this would
> allow the subnet 192.168.0.0, but could mean anything from a /16 to a /32
> 4- access-list 10 permit 192.168.0.0 0.0.0.255 <-- allows just the /24
>
> Can I use any one of them for matching network 192.168.0.0/24? I see they
> work, but can they be correct for any instance? (we usually don't know
> who can correct our lab, so have to be prepared).
>
> ---- Yes, the answer is it depends. You'll find that your freedom in
> selection is already dictated to you by what a question either asks or
> denies you from choosing. As far as matching the 192.168.0.0/24 network,
> option 1 would possibly be frown upon. Option 3 is pretty typical when
> matching routes.
>
> Thanks
>
> Alexandre.
>
>
> -ryan
>
>
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Received on Tue Jun 02 2009 - 16:46:39 ART