Re: I never thought of this scenario

On 20.04.2024 um 13:28 Uhr The Natural Philosopher wrote:

On 20/04/2024 12:54, Marc Haber wrote:

Richard Kettlewell <invalid@invalid.invalid> wrote: 

I don’t personally care how DHCP gets across routers but from a
quick skim it looks like it relies some kind of relay agent. Table
1 or section 3.1 might be reasonable references. 

 
DHCP uses both broadcast and unicast communication. Broadcast is
mainly used in stages where the client system does not yet have a
valid IP address and thus cannot use unicast.
 
For the broadcast part of the protocol, a relay agent is needed when
the DHCP server does not have access to the broadcast domain the
client is connected to.
 
As soon as the client can speak proper IP, it communicates directly
with the DHCP server, this part of communication relys on regular IP
routing and does not need the relay agent any more.
 
Greetings
Marc 

 
The so called 'relay agent' is simply part of what high end routers
DO. A router is itself a 'relay agent'

It is completely independent of routing. A normal computer can act as
an DHCP relay agent.
Professional routers simply include that because there is often a need
for it and the amount of performance and work needed for the relay
agent is small.


--
kind regards
Marco

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