Network Address getting assigned to client and ping not working (ver 4.2.2)

Glenn Satchell glenn.satchell at uniq.com.au
Wed Apr 25 01:42:43 UTC 2012


This was the case many years ago, like mid 1990s, where some dhcp 
clients couldn't handle a valid address ending in .0 or .255. I seem to 
remember this was a recommendation in the early Cisco configuration 
instructions.

These days it shouldn't be a problem any more.

regards,
-glenn

On 04/25/12 01:08, Peter Rathlev wrote:
> On Tue, 2012-04-24 at 16:55 +0200, Peter Rathlev wrote:
>> You don't have to exclude those addresses. We have many networks larger
>> than /24 (typically /22) and we have had no problems with hosts being
>> assigned .0 og .255. These hosts include Avaya 1220 and 1140E phones and
>> Windows XP clients. The DHCP server will not automatically exclude those
>> addresses, at least not the ISC DHCPd.
>
> Examples for these:
>
>  From 10.104.0.0/22 we have an Avaya 1140E running firware "0625C7M":
>
> lease 10.104.1.0 {
>    starts 2 2012/04/24 14:21:07;
>    ends 3 2012/04/25 02:21:07;
>    tstp 5 2012/04/20 05:00:30;
>    tsfp 3 2012/04/25 08:21:07;
>    atsfp 3 2012/04/25 08:21:07;
>    cltt 4 2012/04/19 11:00:30;
>    binding state active;
>    next binding state expired;
>    hardware ethernet 3c:b1:5b:53:06:a8;
>    set commit-vendor-class = "Nortel-i2004-A";
>    client-hostname "T3CB15B5306A8";
> }
>
>  From 10.22.72.0/22 we have a Windows XP client:
>
> lease 10.22.74.0 {
>    starts 2 2012/04/24 09:45:03;
>    ends 2 2012/04/24 21:45:03;
>    tstp 1 2012/04/23 15:45:00;
>    tsfp 3 2012/04/25 03:45:03;
>    atsfp 3 2012/04/25 03:45:03;
>    cltt 0 2012/04/22 21:45:00;
>    binding state active;
>    next binding state expired;
>    hardware ethernet 00:21:6a:20:e4:fc;
>    uid "\001\000!j \344\374";
>    set commit-vendor-class = "MSFT 5.0";
>    client-hostname "A70219";
> }
>
> Plenty of Android devices, Juniper/Trapeze access points (MP-82 and
> MP-522) and Linux Ubuntu or Fedora hosts besides these have had no
> problems.
>


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