From: yu chunyan (yuchunyan@hotmail.com)
Date: Sat Sep 13 2003 - 21:56:47 GMT-3
or
ip prefix list smallsubs seq 35 deny 0.0.0.0/0 ge 25
Bin.
>From: "Kaiser Anwar" <kaiseranwar@sbcglobal.net>
>Reply-To: "Kaiser Anwar" <kaiseranwar@sbcglobal.net>
>To: "Steve Cromie" <scromie@cisco.com>, "ccielab" <ccielab@groupstudy.com>
>Subject: Re: Ip Prefix-list
>Date: Fri, 12 Sep 2003 20:53:45 -0500
>
>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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