[j-nsp] DHCP Proxy client on E320

[Truman Boyes]

Hi,

You can have the external DHCP server have two different pools and it  
can key off the src address or src mac of the BRAS. Take a look at the  
man page for ISC DHCPD. Search for address pools and subclasses.

An example of subclasses:

        class "allocation-class-1" {
          match pick-first-value (option dhcp-client-identifier,  
hardware);
        }

        class "allocation-class-2" {
          match pick-first-value (option dhcp-client-identifier,  
hardware);
        }

        subclass "allocation-class-1" 1:8:0:2b:4c:39:ad;
        subclass "allocation-class-2" 1:8:0:2b:a9:cc:e3;
        subclass "allocation-class-1" 1:0:0:c4:aa:29:44;

        subnet 10.0.0.0 netmask 255.255.255.0 {
          pool {
            allow members of "allocation-class-1";
            range 10.0.0.11 10.0.0.50;
          }
          pool {
            allow members of "allocation-class-2";
            range 10.0.0.51 10.0.0.100;
          }
        }

Truman


On 6/07/2009, at 6:07 AM, stammb wrote:

> Hi everybody.
>
>
>
> Anybody tried a "DHCP Proxy client" function on E320 series?
>
> I have two E320, acting as BRAS in our network. IP address  
> allocation is made with local ip pools stored on each of E320 (ip  
> local pool 1 10.10.10.1 10.10.10.254)
>
> and with added ip route (ip route 10.10.10.0 255.255.255.0 null0)  
> for advertising purposes.
>
> PPPoE discovery packets are distributed to booth E320 boxes.  If one  
> of two Boxes (E320) fail, the PPPoE discovery packets are switched  
> (aggregation network before Bras boxes) to another box.
>
> And we have manually to move all ip local pools from firs to second  
> box.
>
>
>
> Now I like to try a functionality of a DHCP Proxy client. By Juniper  
> "DHCP proxy client support enables the router to obtain an ip  
> address from external DHCP server for a remote PPP client.
>
> Wit this functionality I solve a problem with local stored ip pools,  
> the pool will be stored on external DHCP server. BRAS act like a  
> DHCP proxy client".
>
>
>
> How do I separate ip pools on dhcp server? One ip pool for BRAS one  
> and another for BRAS two, or rather one big ip pool for both.
>
> How to make a migration of  ip pools in case of failure one of BRAS?
>
> What it's with ip address advertising in this case on each of E320?
>
> How do I solve this?
>
> Any ideas?
>
>
>
> I know many questions and no answers. Still thanks for any help.
>
>
>
> B.Stam
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