dhcp relay - stateless

Michael Loftis mloftis at wgops.com
Wed Jul 19 23:01:15 UTC 2006

--On July 19, 2006 3:40:41 PM -0700 foomail123 <foomail123 at yahoo.com> wrote:

> Thank you for last response.
> Since dhcp relay is stateless, if there are multiple
> interfaces, how does relay know which interface to
> foward DHCP offer received from server ?
> How does relay work in vlan case (multiple interfaces
> in a vlan) ?
> Also, being stateless if same host is connected to
> multiple interfaces and/or vlans, how does relay
> process DHCP offer packet received from server ?

All of the information it needs is contained in the request and response 
packets.  The request contains everything it needs to pass to the dhcp 
server, the dhcp server responds with everything the dhcp relay needs to 
connect the response to the correct client.  Therefore, it needs no state.

> Thanks,

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