clients with no hostname
jeffrey j donovan
donovan at beth.k12.pa.us
Thu Jan 19 02:49:24 UTC 2012
On Jan 18, 2012, at 10:03 AM, Glenn Satchell wrote:
> There are a few ways you can do it on the server, eg:
>
> option hostname = pick-first-value (option hostname, binary-to-ascii( ...) );
>
> where the unique string for the default hostname can be derived from the mac or ip address using binary-to-ascii, eg:
>
> concat (binary-to-ascii (10, 8, "-", leased-address), "-dhcp");
>
> concat (binary-to-ascii (16, 8, "-", substring (hardware, 1, 6), "-dhcp");
>
> Useful man pages are dhcp-options and dhcp-eval.
>
> regards,
> -glenn
>
thanks for the reply glenn,
I'm a little confused on how to trigger if the hostname is blank. Ive already been able to group by the first characters in the hostname.
sample of my config.
class "FHS" {
match if substring (option host-name,0,3) = "FHS"
or substring (option host-name,0,3) = "CFF";
}
could i do something like this ?
class "FOO" {
match if substring (option host-name,0,8) = " ";
}
does that look correct ?
-j
> On 01/19/12 00:05, jeffrey j donovan wrote:
>> Greetings
>>
>> I have been giving out ip addresses to machines on my network. I'm looking at my lease file and I have found many devices do not have a hostname identifier.
>>
>> IP address: 10.153.15.101 Lease status: Active Lease start: 17/01/2012 09:01:11 Lease end: 18/01/2012 09:01:11 Mac address: 00:1e:52:70:f7:53 WINS name: FHS-CFF-LA06-06
>> IP address: 10.153.15.114 Lease status: Active Lease start: 17/01/2012 09:01:35 Lease end: 18/01/2012 09:01:35 Mac address: 00:1e:52:70:f7:5e WINS name: FHS-CFF-LA06-02
>> IP address: 10.153.15.115 Lease status: Active Lease start: 17/01/2012 08:27:05 Lease end: 18/01/2012 08:27:05 Mac address: 00:23:12:06:20:4a
>> IP address: 10.153.15.117 Lease status: Active Lease start: 17/01/2012 08:45:28 Lease end: 19/01/2012 08:45:28 Mac address: 00:23:12:06:20:6e
>>
>>
>> how can I ensure a client has a hostname before dhcp hands out an address . in this case, two machines have the correct WINS name, the other has nothing.
>>
>> Is there a way I can say,...
>>
>> If WINS name = " blank" then send this address , else send this.
>>
>> or
>>
>> if WINS name = F00 then send " ipaddress "
>>
>>
>> any insight would be helpful.
>> -j
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>
>
> --
> regards,
> -glenn
> --
> Glenn Satchell | Miss 9: What do you
> Uniq Advances Pty Ltd, Sydney Australia | do at work Dad?
> mailto:glenn.satchell at uniq.com.au | Miss 6: He just
> http://www.uniq.com.au tel:0409-458-580 | types random stuff.
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