option 82 on isc dhcp

[Dan Ross]

lease-file-name "/var/db/dhcpd.leases";
ddns-update-style none;
authoritative;
option agent.circuit-id 2 ;
default-lease-time 3100;        # 51 minutes.
max-lease-time 604800;          # 1 week


subnet 10.10.10.0 netmask 255.255.255.0 {
        option routers 10.10.10.1;
        option subnet-mask 255.255.255.0;
        option broadcast-address 10.10.10.255;

        # The latest input from layer-9 required us to shift the dynamic
        # range from the top half of the subnet down to the bottom half.
        # This pool clause will elicit NAKs for the old leases while the
        # clients migrate.  Remember to remove this once they've all booted
        # once or expired.
        pool {
                range 10.10.10.12 10.10.10.127;
}
if exists agent.circuit-id
{
        log ( info, concat( "Lease for ", binary-to-ascii (10, 8, ".", 
leased-ad
dress), " is connected to interface ",
        binary-to-ascii (10, 8, "/", suffix ( option agent.circuit-id, 
2)), " (a
dd 1 to port number!), VLAN ",
        binary-to-ascii (10, 16, "", substring( option agent.circuit-id, 
2, 2)),
  " on switch ",
        binary-to-ascii(16, 8, ":", substring( option agent.remote-id, 
2, 6))));

        log ( info, concat( "Lease for ", binary-to-ascii (10, 8, ".", 
leased-ad
dress),
        " raw option-82 info is CID: ", binary-to-ascii (10, 8, ".", 
option agen
t.circuit-id), " AID: ",
        binary-to-ascii(16, 8, ".", option agent.remote-id)));


Eric Anderson wrote:

> Dan Ross wrote:
>
>> Eric,
>> Thanks I have tried using that in my conf file but the original 
>> author didnt seem to know where he got his stuff for data entries.  I 
>> am struggling to even understand his logging entry in the conf file.  
>> How does one submit a mail to the isc-org.  dhcp server mailing 
>> list.  I have the entry in my conf file but no entries are added to 
>> my log file even though the server spews out an address.  Any ideas?
>
>
> Can you post your config file?  (minus any extra junk we don't need)
>
> Eric
>
>
>
>> Eric Anderson wrote:
>>
>>> Dan Ross wrote:
>>>
>>>> Hello;
>>>> I am trying to configure my freebsd ISC dhcp server to support and 
>>>> log option 82 requests.  Can anybody direct me to a how to page or 
>>>> even maybe render some assistance if they have done this before?
>>>
>>>
>>>
>>>
>>> I don't know all the details, but maybe these snippets and links can 
>>> help you:
>>>
>>> agent.circuit-id is also known as option 82
>>>
>>> http://www.archivum.info/dhcp-server%40isc.org/2005-02/msg00026.html
>>> http://www.archivum.info/dhcp-server%40isc.org/2005-06/msg00142.html
>>>
>>> man dhcp-options
>>> man dhcp-eval
>>>
>>> http://www.faqs.org/rfcs/rfc3046.html
>>>
>>> dhcpd.conf hints:
>>> Top of dhcpd.conf (you may have to do this, you may not):
>>> option agent.circuit-id code 82 = string;  # is it a string?
>>>
>>> That's all I could conjure up..
>>>
>>> Eric
>>>
>>>
>>>
>>>
>>>
>
>