From: Lab Candidate (labccie@xxxxxxxxx)
Date: Wed Feb 13 2002 - 21:33:09 GMT-3
Scott, I know I said access-list is correct. but don't
these access-lists all translate to
access-list n permit 192.168.120.0 0.0.7.255 ?
So all these access-lists are correct.
--- Scott Morris <swm@emanon.com> wrote:
> Access list one would translate to:
>
> access-list 1 permit 192.168.120.0 0.0.7.255
>
> Because that's where the bit boundary is. :) Remember, we aren't working in
> decimal sequential order, we're really working in binary.
>
> Scott
>
> -----Original Message-----
> From: Lab Candidate [mailto:labccie@yahoo.com]
> Sent: Wednesday, February 13, 2002 5:32 PM
> To: Scott Morris; Sam.MicroGate@usa.telekom.de; ccielab@groupstudy.com
> Subject: RE: ACL question
>
>
> I'd say access-list 1 is right, it can do what he is asking for.
>
> --- Scott Morris <swm@emanon.com> wrote:
> > F. None of the above...
> >
> > Because of bit boundaries though, you can't summarize quite so nicely.
> >
> > access-list 6 permit 192.168.123.0 0.0.0.255
> > access-list 6 permit 192.168.124.0 0.0.3.255
> >
> > That will cover 123, 124, 125, 126 and 127. The implicit deny will catch
> > 128 and 129....
> >
> > Hope that helps.
> >
> > Scott
> >
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> > Sam.MicroGate@usa.telekom.de
> > Sent: Wednesday, February 13, 2002 4:02 PM
> > To: ccielab@groupstudy.com
> > Subject: ACL question
> >
> >
> > Suppose that the backbone is advertising the following routes:
> > 192.168.123.0/24
> > 192.168.124.0/24
> > 192.168.125.0/24
> > 192.168.126.0/24
> > 192.168.127.0/24
> > 192.168.128.0/24
> > 192.168.129.0/24
> > I need to filter .128 and .129 and pass every thing else. which of the
> > following access list is correct
> > access-list 1 permit 192.168.123.0 0.0.7.255 or
> > access-list 2 permit 192.168.124.0 0.0.7.255 or
> > access-list 3 permit 192.168.125.0 0.0.7.255 or
> > access-list 4 permit 192.168.126.0 0.0.7.255 or
> > access-list 5 permit 192.168.127.0 0.0.7.255
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