User defined options question

[Joe Hammerman]

Hello DHCP users list.

I am trying to setup DHCP classes so I can assign machines to different pools within the same subnet, thereby assigning them to different ddns zones.

It seems the best way to do this is with a user defined option passed along with the request from the client.

My dhclient version is 3.0.5.

I have edited my dhclient.conf on my test machine. It looks like this:

cat /etc/dhclient-eth0.conf
option zone-name code 194 = text;
send zone-name "SACDB";
send host-name "ddns-test6";  # temporary RHL ifup addition

I added the following line to my /etc/dhcpd.conf file:

option zone-name code 194 = text;

But tcpdump yields:

21:03:48.943072 00:24:a8:7c:0a:00 > 00:1e:c9:b1:f7:cf, ethertype IPv4 (0x0800), length 342: (tos 0x10, ttl  15, id 56396, offset 0, flags [none], proto: UDP (17), length: 328) 172.17.0.2.bootpc > 10.1.64.11.bootps: BOOTP/DHCP, Request from 36:cd:a9:46:42:fa, length: 300, hops:1, xid:0xf4a8e1e, flags: [none]
          Gateway IP: 172.17.0.2
          Client Ethernet Address: 36:cd:a9:46:42:fa
          Vendor-rfc1048:
            DHCP:REQUEST
            RQ:172.17.8.252
            HN:"ddns-test6"
            PR:SM+BR+TZ+DG+DN+NS+HN+YD+YS+NTP
            T194:83.65.67.68.66
21:03:48.960571 00:1e:c9:b1:f7:cf > 00:00:5e:00:01:a4, ethertype IPv4 (0x0800), length 353: (tos 0x0, ttl  64, id 0, offset 0, flags [DF], proto: UDP (17), length: 339) 10.1.64.11.bootps > 172.17.0.1.bootps: BOOTP/DHCP, Reply, length: 311, hops:1, xid:0xf4a8e1e, flags: [none]
          Your IP: 172.17.8.252
          Server IP: 10.1.64.11
          Gateway IP: 172.17.0.1
          Client Ethernet Address: 36:cd:a9:46:42:fa
          file "pxelinux.0"
          Vendor-rfc1048:
            DHCP:ACK
            SID:10.1.64.11
            LT:21600
            SM:255.255.224.0
            DG:172.17.0.1
            DN:"videoegg.com sacda.videoegg.com"
            NS:10.1.64.11,10.1.64.12
21:03:48.962632 00:1e:c9:b1:f7:cf > 00:00:5e:00:01:a4, ethertype IPv4 (0x0800), length 353: (tos 0x0, ttl  64, id 0, offset 0, flags [DF], proto: UDP (17), length: 339) 10.1.64.11.bootps > 172.17.0.2.bootps: BOOTP/DHCP, Reply, length: 311, hops:1, xid:0xf4a8e1e, flags: [none]
          Your IP: 172.17.8.252
          Server IP: 10.1.64.11
          Gateway IP: 172.17.0.2
          Client Ethernet Address: 36:cd:a9:46:42:fa
          file "pxelinux.0"
          Vendor-rfc1048:
            DHCP:ACK
            SID:10.1.64.11
            LT:21600
            SM:255.255.224.0
            DG:172.17.0.1
            DN:"videoegg.com sacda.videoegg.com"
            NS:10.1.64.11,10.1.64.12

Can anyone give me any guidance?

Thanks!
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