Vendor options not being sent

[Arno Lehmann]

Hi all,

I'm currently struggling to send some vendor options to a dhcp client, 
so far without success.

I've got dhcpd serving a number of IPv4 subnets for quite a while, and 
the basic stuff all works fine.

Now I've got an old sun server I want to boot from the network, and 
set up its boot configuration with dhcp.

I ended up defining an "option space SUNW;" with all the needed 
options - that part seems to work as I don't get complaints on dhcpd 
startup.

Then I've got one locally connected subnet inside which I - after 
trying many other approaches - ended up with this construct:

   class "v210" {
     match if option vendor-class-identifier = "SUNW.Sun-Fire-V210";
   }

   pool {
     range 192.168.37.125 192.168.37.125;
     allow members of "v210";
     next-server X;
     filename "sol10sparc";
     option host-name "sun1";
     option domain-name "a.b.com";
     ddns-hostname "sun1";
     ddns-domainname "a.b.com";
     vendor-option-space SUNW;
     option SUNW.install-server-hostname "X";
     option SUNW.install-server-ip-address 192.168.m.n;
     option SUNW.root-server-hostname "X";
     option SUNW.install-path "/sol10";
     option SUNW.root-server-ip-address 192.168.m.n;
     option SUNW.root-path-name "/sol10/Solaris_10/Tools/Boot";
     option SUNW.sysid-config-file-server "192.168.m.n:/sol10/config";
     option SUNW.JumpStart-server "192.168.m.n:/sol10/jumpstart";
   }

which seems to work basically - the (only) IP address is assigned, 
registered in DNS, the host name is assigned, etc. Unfortunately, the 
Vendor Options are never sent...

I believe I confirmed this by checking with tcpdump. This is a DISCOVER:

> 21:34:43.355965 IP (tos 0x0, ttl  64, id 1, offset 0, flags [none], proto: UDP (
> 17), length: 328) 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request f
> rom 00:03:ba:59:f1:0d (oui Unknown), length: 300, xid:0x21f83d33, flags: [none]
>           Client Ethernet Address: 00:03:ba:uu:vv:ww (oui Unknown)
>           Vendor-rfc1048:
>             DHCP:DISCOVER
>             VC:"SUNW.Sun-Fire-V210"
>             PR:SM+DG+HN+VO
>             MSZ:1472

Here, a REPLY:

> 21:34:43.356294 IP (tos 0x10, ttl  16, id 0, offset 0, flags [none], proto: UDP
> (17), length: 328) d.e.f.g.bootps > sun1.a.b.
> com.bootpc: BOOTP/DHCP, Reply, length: 300, xid:0x21f83d33, flags: [none]
>           Your IP: sun1.a.b.com
>           Server IP: X.Y.Z
>           Client Ethernet Address: 00:03:ba:uu:vv:ww (oui Unknown)
>           file "sol10sparc"
>           Vendor-rfc1048:
>             DHCP:OFFER
>             SID:d.e.f.g
>             LT:8000
>             SM:255.255.255.0
>             DG:d.e.f.g
 >        0x0000:  <dump snipped>

Then, the REQUEST:

> 21:34:47.373359 IP (tos 0x0, ttl  64, id 2, offset 0, flags [none], proto: UDP (
> 17), length: 328) 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request f
> rom 00:03:ba:uu:vv:ww (oui Unknown), length: 300, xid:0x21f83d33, flags: [none]
>           Client Ethernet Address: 00:03:ba:uu:vv:ww (oui Unknown)
>           Vendor-rfc1048:
>             DHCP:REQUEST
>             VC:"SUNW.Sun-Fire-V210"
>             PR:SM+DG+HN+VO
>             MSZ:1472
>             SID:d.e.f.g
>             RQ:sun1.a.b.com
>         0x0000: 

And, finally, the REPLY:

> 21:34:47.373717 IP (tos 0x10, ttl  16, id 0, offset 0, flags [none], proto: UDP
> (17), length: 328) d.e.f.g.bootps > sun1.a.b.
> com.bootpc: BOOTP/DHCP, Reply, length: 300, xid:0x21f83d33, flags: [none]
>           Your IP: sun1.a.b.com
>           Server IP: X.Y.Z
>           Client Ethernet Address: 00:03:ba:uu:vv:ww (oui Unknown)
>           file "sol10sparc"
>           Vendor-rfc1048:
>             DHCP:ACK
>             SID:d.e.f.g
>             LT:8000
>             SM:255.255.255.0
>             DG:d.e.f.g
>         0x0000: <dump follows>

What I read in the above is that Vendor options are requested 
("PR:SM+DG+HN+VO") but I don't see them in any response packet.

As I tried this with both my (outdated) production dhcpd 3.0.5 as well 
as a freshly compiled 4.1.1-P1 version without any difference in 
behaviour, I assume the problem is in my configuration.

Any hints?

By the way - initially, I tried the plain approach of defining a host 
with a static address and all the options, but that resulted in 
exactly the same result - no vendor options delivered to the client.

Thanks,

Arno

-- 
Arno Lehmann
IT-Service Lehmann
Sandstr. 6, 49080 Osnabrück
www.its-lehmann.de