[c-nsp] LWAPP controller via ISC DHCP

[Phil Mayers]

A.L.M.Buxey at lboro.ac.uk wrote:
> option controller code 43 = text; 
> option controller "10.1.0.10,10.1.0.11,10.1.0.12";
> 
> however, the newer APs are using the newer vendor-specified options...which,
> in itself has had a few churns between ISC v2 and ISC v3. 
> 
> what I've currently got, in Cisco DHCP form is
> 
> option 60 ascii "Cisco AP c1130"
> 
> option 43 hex f10C0a01000a0a01000b0a01000c
> 
> where 
> 
> f1 is always f1 (its the type),
> 0C is the number of controller management IP addresses times 4 in hex (the 'length')
> f10C0a01000a0a01000b0a01000c are the 3 IP address in hex
> 
> 
> now, I believe this is pretty much it - but I was wondering if there were any ISC DHCP
> users out there that could help redux this into ISC DHCPD v3 language... 

"man dhcp-options" covers this and more. Well worth a read - lots of 
hidden gems.

Try:

option cisco-lwapp-junk code 43 = { integer 8, array of ip-address };
# 241 = 0xf1
option cisco-lwapp-junk 241 10.0.0.1, 10.0.0.2;

It's been a while since I tried it, but if I recall this does it as 
well, but cleaner:

option space cisco-junk;
option cisco-junk.lwapp-controllers code 241 = array of ip-address;
option cisco-junk-encap code 43 = encapsulate cisco-junk;

option cisco-junk.lwapp-controllers = 10.0.0.1, 10.0.0.2;

Anyway, see the man page for more info. "man dhcp-eval" is worth looking 
at as well.