From: Ryan DeBerry (rdeberry@gmail.com)
Date: Sat Dec 13 2008 - 16:24:08 ARST
if you use 0 in the last octet, that allows for 0 hosts.
whats the wildcard mask for a /24
0.0.0.255
8 bits for host
right.
so lets say you put a 0 in the last octet
0.0.0.0
what would that mean?
standard subnet mask it would be 255.255.255.255 or /32
so if you do that in his example what are you left, rather what networks are
you really matching?
0.0.11.0
On Sat, Dec 13, 2008 at 1:10 PM, Kelvin Yeo <kelvinyeo24@yahoo.com.sg>wrote:
>
>
> I am abit confused about the usage whether to use '0' or '255' as the last
> octet. What scenario should either come into use?
>
> Rdgs,
> KY
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> John
> Edom
> Sent: 13 December 2008 23:00
> To: Ryan DeBerry
> Cc: Cisco certification
> Subject: Re: ACL - Single Satement
>
> Yes in that sense you are right but if i am using this acl in
> distribution-list to match networks/prefixs i am thinking in that way...
> because normal i have seen this kind of acls in route filtering.
>
> Regards
>
> On Sat, Dec 13, 2008 at 6:46 PM, Ryan DeBerry <rdeberry@gmail.com> wrote:
>
> > If that were the case how many hosts are you gonna have on those
> networks?
> >
> > NONE.
> >
> > Make sense?
> >
> >
> >
> > On Sat, Dec 13, 2008 at 9:38 AM, John Edom <jedom123@gmail.com> wrote:
> >
> >> hi
> >> Ryan/Sachin thanks for link and explaination. I am clear about 3 octate
> >> now just tell me what about 4 octate because we are matching bit by bit
> so
> >> since in last octate all 0's are match it should be 0 in wildcard rather
> >> then 255?
> >>
> >> Regards
> >>
> >>
> >> On Sat, Dec 13, 2008 at 6:31 PM, Ryan DeBerry <rdeberry@gmail.com>
> wrote:
> >>
> >>>
> >>>
>
> http://blog.internetworkexpert.com/2007/12/26/q-how-do-i-compute-complex-wil
> dcard-masks-for-access-lists/<http://blog.internetworkexpert.com/2007/12/26/q-how-do-i-compute-complex-wildcard-masks-for-access-lists/>
> >>>
> >>>
> >>> On Sat, Dec 13, 2008 at 9:31 AM, John Edom <jedom123@gmail.com> wrote:
> >>>
> >>>> Hi,
> >>>>
> >>>> Do anyone have some complex examples for batter understanding?
> >>>>
> >>>> Regards
> >>>>
> >>>>
> >>>> On Sat, Dec 13, 2008 at 6:28 PM, John Edom <jedom123@gmail.com>
> wrote:
> >>>>
> >>>>> hi,
> >>>>>
> >>>>> i think wildcard will be 0.0.11.0 because in forth octet all networks
> >>>>> have zeros so all match means 0.
> >>>>>
> >>>>> Third Octate
> >>>>> 0100
> >>>>> 0101
> >>>>> 0110
> >>>>> 0111
> >>>>> 1100
> >>>>> 1101
> >>>>> 1110
> >>>>> 1111
> >>>>> --------
> >>>>> 1011 - wildcard that is 11
> >>>>>
> >>>>> Correct me if i am wrong.......
> >>>>>
> >>>>> Regards
> >>>>>
> >>>>>
> >>>>> On Sat, Dec 13, 2008 at 6:09 PM, Ryan DeBerry
> <rdeberry@gmail.com>wrote:
> >>>>>
> >>>>>> I think it should be
> >>>>>>
> >>>>>> 192.168.4.0 0.0.11.255
> >>>>>>
> >>>>>> Third octet has last 4 in common
> >>>>>>
> >>>>>> 8-4-2-1
> >>>>>>
> >>>>>> 4 is always on so wild card mask it would be off.
> >>>>>>
> >>>>>> 8+2+1=11
> >>>>>>
> >>>>>> On Sat, Dec 13, 2008 at 7:42 AM, John Edom <jedom123@gmail.com
> >wrote:
> >>>>>>
> >>>>>>> Hi,
> >>>>>>>
> >>>>>>> can we write these all network in single ACL line
> >>>>>>>
> >>>>>>> 192.168.4.0
> >>>>>>> 192.168.5.0
> >>>>>>> 192.168.6.0
> >>>>>>> 192.168.7.0
> >>>>>>>
> >>>>>>> 192.168.12.0
> >>>>>>> 192.168.13.0
> >>>>>>> 192.168.14.0
> >>>>>>> 192.168.15.0
> >>>>>>>
> >>>>>>> Regards
> >>>>>>>
> >>>>>>>
> >>>>>>> Blogs and organic groups at http://www.ccie.net
> >>>>>>>
> >>>>>>>
> >>>>>>>
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