This is of course the opposite of H.248 where replies must go to source address. But remember that there are requests (as opposed to confirms and rejects) that are sent from GK to GW and the GK must know what address to use. If no rasaddress were registered and ARQs (for example) came from various port numbers, the GK would have no idea where to send a DRQ, URQ, IRQ, etc.

rasaddress is not optional in GRQ and so cannot be omitted. It is probably not intended to be optional in RRQ although since it is defined as SEQUENCE OF TransportAddress and SEQUENCES can be of zero length, it is in effect optional. A comment probably should be added to make it required for the above reason.

"Paul E. Jones" wrote:

Francois, There is no requirement that RAS messages sent to a Gatekeeper have to be sent from the same port that it will receive RAS messages. If it is not included, I would expect that the results will be unpredictable. Some devices will probably assume an address and others will probably just reject the request. Paul

 ----- Original Message -----
 From: Francois Audet
 To: ITU-SG16@mailbag.cps.INTEL.COM
 Sent: Thursday, April 12, 2001 8:17 PM
 Subject: ras address in RRQ/GRQ
  Guys,What is the purpose of the rasAddress in GRQ and
 RRQ?Shouldn't it just be the originating IP address? Is the
 gatekeeper supposed to send the GCF and RCF to IP address
 indicated in the GRQ/RRQ, or is it supposed to send it to
 the source IP address (at the IP layer)?What if the RAS
 address is not included in the RRQ/GRQ?----François AUDET,
 Nortel Networksmailto:audet@nortelnetworks.com, tel:+1 408
 495 3756

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