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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