[ale] Routing question (newbie alert!!)
Joe Steele
joe at madewell.com
Mon May 6 20:18:32 EDT 2002
On Monday, May 06, 2002 3:54 PM, Joseph A Knapka wrote:
>
> The DHCP stuff shouldn't matter, as DHCP is not an IP
> protocol (hosts participating in a DHCP dialog presumably
> don't yet have an IP address.) DHCP conversations travel
> in raw Ethernet frames without an IP header.
Umm... I don't think so. From RFC 2131:
DHCP uses UDP as its transport protocol. DHCP messages from a client
to a server are sent to the 'DHCP server' port (67), and DHCP
messages from a server to a client are sent to the 'DHCP client' port
(68). A server with multiple network address (e.g., a multi-homed
host) MAY use any of its network addresses in outgoing DHCP messages.
...
DHCP messages broadcast by a client prior to that client obtaining
its IP address must have the source address field in the IP header
set to 0.
You're probably confusing it with ARP.
--Joe
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