[j-nsp] DHCP server recommendation for subscribers management

[Bjørn Mork]

Andrey Kostin <ankost at podolsk.ru> writes:
> Bjørn Mork via juniper-nsp писал 2021-08-06 12:38:
>> Andrey Kostin via juniper-nsp <juniper-nsp at puck.nether.net> writes:
>> 
>>> What DHCP server do you use/would recommend to deploy for subscriber
>>> management?
>> The one in JUNOS. Using RADIUS as backend.
>> 
>
> Thanks, currently using it but looking for a central server for more
> effective IP usage.

Probably stupid question, but here goes... How does a central server
make the IP usage more effective?  Are you sharing pools between
routers?

In any case, you can do that with a sufficiently smart RADIUS server
too.  You don't have to let JUNOS manage the address pools even if it is
providing the DHCP frontend.

IMHO, having the DHCP frontend on the edge makes life so much easier.
Building a sufficiently redundant and robust centralized DHCP service is
hard.  And the edge router still has to do most of the same work anyway,
relaying broadcasts and injecting access routes.  The centralized DHCP
server just adds an unneccessary single point of failure.


Bjørn