ISC DHCP Class match statement

don_wombat_73 · 01-27-2011, 12:54 PM

I'm a bit green at creating classes in ISC. Could someone proofread this for me? I think I'm missing a semi-colon somewhere...

Code:

class "STB" {
 match if (
  (
   (substring (option vendor-class-identifier, 0, 12) = "minerva3800w") or
   (substring (option vendor-class-identifier, 0, 13) = "minerva5810wx") or
   (substring (option vendor-class-identifier, 0, 12) = "ADB-3721WN") or
   (substring (option vendor-class-identifier, 0, 12) = "ADB-5721WNX") or
   (substring (option vendor-class-identifier, 0, 14) = "minerva2500w")
   ) and
    match if substring(hardware, 1,3) = 00:03:91;
 )
}

TIA

BenLogan79 · 02-02-2011, 03:33 PM

Quote:

Originally Posted by don_wombat_73

I'm a bit green at creating classes in ISC. Could someone proofread this for me? I think I'm missing a semi-colon somewhere...

Code:

class "STB" {
 match if (
  (
   (substring (option vendor-class-identifier, 0, 12) = "minerva3800w") or
   (substring (option vendor-class-identifier, 0, 13) = "minerva5810wx") or
   (substring (option vendor-class-identifier, 0, 12) = "ADB-3721WN") or
   (substring (option vendor-class-identifier, 0, 12) = "ADB-5721WNX") or
   (substring (option vendor-class-identifier, 0, 14) = "minerva2500w")
   ) and
    match if substring(hardware, 1,3) = 00:03:91;
 )
}

TIA

I don't think you are missing a semicolon, I think the problem is with your second match statement. Try this instead:

Code:

class "STB" {
 match if (
  (
   (substring (option vendor-class-identifier, 0, 12) = "minerva3800w") or
   (substring (option vendor-class-identifier, 0, 13) = "minerva5810wx") or
   (substring (option vendor-class-identifier, 0, 12) = "ADB-3721WN") or
   (substring (option vendor-class-identifier, 0, 12) = "ADB-5721WNX") or
   (substring (option vendor-class-identifier, 0, 14) = "minerva2500w")
  ) and
  (substring(hardware, 1,3) = 00:03:91);
 )
}

Note that there is no second "match if" clause. I could be wrong, but I think that'll do what you want. Interesting that you are using Minerva and ADB STBs. We do the same here. We are just starting to test the 5721 and 3721. We do it a little differently than you are here, but it is always interesting to see how others do things.

Regards,
Ben

don_wombat_73 · 02-04-2011, 04:32 PM

ACK! I knew it was something simple. It works now. THANK YOU FOR THE HELP!

Since I've peeked your interest, how are you doing this?

BenLogan79 · 02-15-2011, 10:03 PM

Quote:

Originally Posted by don_wombat_73

ACK! I knew it was something simple. It works now. THANK YOU FOR THE HELP!

Since I've peeked your interest, how are you doing this?

Don,

The way we do this is to define two classes for each model STB--one for when the box first boots (ADB's firmware pulls this IP), and a second for when Minerva takes over. (The boxes actually pull an IP twice in the boot process.) For example, for a 3800, the two classes look like this:

Code:

class "ADB3800W boot"
{
    match if substring (option vendor-class-identifier, 0, 11) = "minerva3800";
}

class "ADB3800W sw"
{
    match if substring (option vendor-class-identifier, 0, 24) = "udhcp_MRV3X_1_
3800W(ADB)";
}

We then allow members of those classes to the appropriate range(s). It's not too hard to keep up with, but I'm always trying to find easier ways to do things, ha. We are a telephone co-op, and have about 8 exchanges we offer TV service in. Our DSLAMs relay the DHCP traffic to the DHCP server, and they set the option 82 info along the way. With our other services (Internet and VOIP), I can target specific DSLAMs within an exchange and treat them differently, but the way we do the video right now, I can only do an exchange at a time. So I've been thinking about changing it up. One of the ways I was thinking about was using subclassing--I haven't played with it yet though.

Sorry it took so long to respond to you. I just realized tonight that I never finished posting.

Regards,
Ben