RE: [dhcwg] Ports clarification on DHCPv6

["Andre Kostur" <akostur at incognito.com>]

OK... but I guess an early warning on the source port issue:  Note that
for DHCPv4 we (the WG) seem to be recommending that relays MUST use 67
as their source port number (draft-ietf-dhc-implementation-02, section
4.7.2).  Looking forward, are we not going to be running into exactly
the same issues in the DHCPv6 world?

-----Original Message-----
From: Ralph Droms [mailto:rdroms at cisco.com] 
Sent: Thursday, December 07, 2006 10:36 AM
To: Andre Kostur; dhcwg at ietf.org
Subject: Re: [dhcwg] Ports clarification on DHCPv6

Andre - here is a quick response; I need to reread 21.1 (later today,
after
more teleconf hell) to give a complete response.

>From RFC 3315:

5.2. UDP Ports

   Clients listen for DHCP messages on UDP port 546.  Servers and relay
   agents listen for DHCP messages on UDP port 547.

Relays listen for all traffic, whether from a client or the server, on
port
547.  Source addresses are not specified by RFC 3315; any port (not
restricted to just 546 and 547) can be used as a source port.  The
message
recipient ignores the source port.


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