SV: agent.circuit-id (Option-82,2) map to fixed-address

[Lars Jacobsen]

Hello Henrik
Have a look at www.strammelse.dk/dhcp/ where I posted a solution on how we did it.
Othervice mail me off list, or call me

Lars Jacobsen
Sydfyns Elforsyning

> -----Oprindelig meddelelse-----
> Fra: dhcp-users-bounce at isc.org [mailto:dhcp-users-bounce at isc.org] På vegne
> af Henrik Sterndorff Jessen
> Sendt: 29. marts 2007 08:29
> Til: dhcp-users at isc.org
> Emne: agent.circuit-id (Option-82,2) map to fixed-address
> 
> I am using dhcp to dish out fixed addresses to users. All users are
> connected to cisco switch ports that act as a relay and therefore add
> option-82 information to the dhcp query.
> 
> 
> But I would like to provision the dhcp server so each switch port (and
> therefore each user) is assigned a predefined fixed address.
> 
> 
> 
> That requires that I can map the agent.circuit-id to a fixed address.
> "host" entries does not work since I don't know the mac address of the
> end users.
> 
> 
> 
> But I have spend hours on end reading man pages and googling for a way
> to do this. Please help me.
> 
> 
> 
> The only work around I have found is using pools and user groups:
> 
> 
> 
> class "user-john" {
> 
>        match option agent.circuit-id;
> 
> }
> 
> 
> 
> subclass "user-john" 00:04:00:5C:03:04; # This is the cisco switch
> option-82 addition.
> 
> 
> 
> subnet 10.0.0.0 netmask 255.255.255.0 {
> 
>         pool {
> 
>                 allow members of "user-john";
> 
>                 range 10.0.0.10 10.0.0.10;
> 
>                 log (info, "subnet hit");
> 
>         }
> 
> }
> 
> 
> 
> This seems to work. But I am not shure this scales to 10.000's of users.
> 
> 
> 
> Thanks in advance
> 
> Henrik
> 
> 
> 
>