Why does this not work.

[Simon Hobson]

Thomas Raabo - Zitcom A/S <tr at zitcom.dk> wrote:

> Really no one?

If you demand a response within 15 hours, then pay for a support contract. If you ask on an open support list, where all support is provided by volunteers within the constraints of having a personal life and earning a living, then be prepared for an answer when someone has time to give it.
http://www.catb.org/~esr/faqs/smart-questions.html#idp54192224


> I wanted to do something like
>  
>  
> subnet 9x.xx.xx.0 netmask 255.255.255.0 {
>         option routers 91.133.32.1;
>         option domain-name-servers 8.8.8.8, 8.8.4.4;
>         max-lease-time 28800;
> }
> host test3 {
>      host-identifier option agent.subscriber-id “sv-e-pe-3.g0/0/0.100";
>      fixed-address 9x.xx.xx.2;
>  }
>  
>  
> But this does not work…
>  
>  
> But this does
>  
> class "sv-e-pe-3.g0/0/0.100" {
>         match if option agent.subscriber-id = "sv-e-pe-3.g0/0/0.100";
> }
> subnet 9x.xx.xx.0 netmask 255.255.255.0 {
>         option routers 91.133.32.1;
>         option domain-name-servers 8.8.8.8, 8.8.4.4;
>         max-lease-time 28800;
>         pool {
>         deny dynamic bootp clients;
>         allow members of "sv-e-pe-3.g0/0/0.100";
>         range 9x.xx.xx.2;
>         }
> }
>  
>  
> What is the difference?

The difference ? One uses host statements, one uses classes <rolleyes>. They also have significant differences in how leases are handled - fixed addresses handed out with host statements never appear in the lease database, and don't go through the normal lease lifecycle (no DNS updates, no expiry).

Why doesn't the first option work ? I *think* a host statement is limited to identifying a host by it's hardware (MAC) address - therefore the host statement doesn't actually have a statement that the server recognises as matching anything.