From: Kaiser Anwar (kaiseranwar@sbcglobal.net)
Date: Fri Sep 12 2003 - 22:53:45 GMT-3
Hi,
everything looks ok except for the last one. which should be
ip prefix list smallsubs seq 35 permit 0.0.0.0/0 le 24
Sincerely,
Kaiser Anwar
CCNA, CCNP
CCSA, MCSE
----- Original Message -----
From: "Steve Cromie" <scromie@cisco.com>
To: "ccielab" <ccielab@groupstudy.com>
Sent: Friday, September 12, 2003 7:47 PM
Subject: Ip Prefix-list
> Hi - I need a head check on prefix-lists. I have some practice questions
> I am working on but there is no answer key to check myself against. Can
> someone please take a look and comment.
>
> Configure a prefix-list that denies all private IP addresses (as defined
in
> RFC1819).
> my solution (with the help of the archives)
> ip prefix-list RFC1918 seq 5 deny 10.0.0.0/8 le 32
> ip prefix-list RFC1918 seq 10 deny 172.16.0.0/12 le 32
> ip prefix-list RFC1918 seq 15 deny 192.168.0.0/16 le 32
>
> The prefix list should also, in selected address ranges, deny small
> subnets according to these guidelines:
> In address range 193.0.0.0 193.255.255.255, do not accept prefixes
> with subnet masks longer than /20.
> my solution
> ip prefix-list smallsubs seq 20 deny 193.0.0.0/8 ge 21
>
> In address range 128.0.0.0 191.255.255.255, do not accept prefixes
> with subnet masks longer than /18.
> my solution
> ip prefix-list smallsubs seq 25 deny 128.0.0.0/2 ge 19
>
> In address range 0.0.0.0 63.255.255.255, do not accept prefixes with
> subnet masks longer than /12.
> my solution
> ip prefix-list smallsubs seq 30 deny 0.0.0.0/2 ge 13
>
> Never accept prefixes longer than /24.
> my solution
> ip prefix list smallsubs seq 35 deny 0.0.0.0/24 ge 25
>
> Thanks,
> Steve
>
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This archive was generated by hypermail 2.1.4 : Wed Oct 01 2003 - 07:24:27 GMT-3