Running new dhcpd instance on same physical interface
Simon Hobson
dhcp1 at thehobsons.co.uk
Thu Mar 12 14:28:03 UTC 2009
Dario Aguilar wrote:
>Hi, I understand your point. Our idea is to isolate different kind of
>services/clients such as DSL, Wimax, IPTv, etc.. into different instances of
>dhcpd, we have many reason to do this (with just 1 box): Eg.
>Troubleshooting, availability, separate same subnets on diff. instances,
>etc...
I think you'll find troubleshooting easier with one instance.
If one of the issues is to segregate control
among different departments, I believe what some
large users do is have their configs 'machine
built'. Keep a database of the required config,
and have a script that builds the new config,
tests it, and makes it live. Done this way, you
can use access controls in the database system to
control who can change what.
>In fact none of this CPE´s are directly connected to the dhcp server
>(I mean on the same broadcast domain) so, the server will never receive any
>broadcast packets. Instead of that it will receive forwarded packets from
>several DHCP Relay´s (unicast traffic) for each service such as DSLAM´s,
>WAC´s, etc..
When the server architecture was laid down, it
was assumed that it would always "handle" any
local interfaces it listens on. So even if all
clients are connected via relay agents, the
server still listens for broadcasts on the local
interface. This has other ramifications as well -
it means the server only works on certain types
of interface. One of those design decisions that
would probably be different if starting from
scratch today, but probably valid when it was
first made.
>I will appreciate very much if you have a better idea or another suggestion
>on how to resolve this without adding another physical interface that in
>fact it will be connected to the subnet that the other one.
I don't have any other good ideas.
--
Simon Hobson
Visit http://www.magpiesnestpublishing.co.uk/ for books by acclaimed
author Gladys Hobson. Novels - poetry - short stories - ideal as
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