> We tried it with the Vendor Id but we did not get the results that
> we were expecting, I am not sure if it is something we are doing
> wrong or else. The User class has more flexibility and that is why
> we wanted to use it.
OK - so what results *were* you expecting? It would help everyone if you
could describe what you are trying to do.
> Does a DHCP client care which port the DHCP server is listening on,
> I thought it does a broadcast.
I suggest you read up on IP. Broadcasting sends to all local
*addresses*, not ports.
> Does not this mean that whichever server picks the request first
> servers the ip from its pool? The reason I ask is that we are
> currently running a small private network (1 win2k DHCP SRVR, 1 TC
> i386, 1 LTSP SRVR i386) but are aim is to use a M/F as an LTSP
> server but since we need to add the ltsp parms to the clients we
> wanted to do it in the least harmful way to our PROD DHCP srvrs and
> least customization.
This is precisely what the VCI is for.
Make sure that your Etherboot has REQUIRE_VCI_ETHERBOOT (so that it
will ignore the MS dhcp servers), and make your ISC dhcp server sends
an "Etherboot" VCI back to the client. Put all config in a section as
follows (so that it ignores non Etherboot clients).
option space Etherboot ;
option Etherboot.VCI code 60 = string;
class "VCI-Etherboot" {
match if substring ( option vendor-class-identifier, 0, 9 ) =
"Etherboot" ;
log ( info, "VCI-Etherboot" ) ;
option Etherboot.VCI "Etherboot" ;
vendor-option-space Etherboot ;
< Other Etherboot options go here >
}
If you have a class, you can also limit the IP address pool that is
used...
pool {
range 10.2.253.1 10.2.253.254 ;
default-lease-time 60 ;
max-lease-time 300 ;
allow members of "VCI-PXE" ;
allow members of "VCI-Etherboot" ;
allow unknown clients ;
deny known clients ;
ping-check false ;
}
... but please read the dhcpd v3 docs.
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