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<TITLE>RE: ras address in RRQ/GRQ</TITLE>
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<P><FONT SIZE=2>The reason I was thinking about this is that if it was NOT included in the RRQ/GRQ, and the gatekeeper would be force to use the source IP address for any other messages (from GK to </FONT></P>
<P><FONT SIZE=2>GW), the same as if it had been explicitly indicated in the GRQ/RRQ, then it would be </FONT>
<BR><FONT SIZE=2>possible to use a gatekeeper on one side of a NAT while both endpoints are on the other side. </FONT>
<BR><FONT SIZE=2>I guess not.</FONT>
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<P><FONT SIZE=2>Thanks Terry.</FONT>
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<P><FONT SIZE=2>> -----Original Message-----</FONT>
<BR><FONT SIZE=2>> From: Terry L Anderson [<A HREF="mailto:tla@LUCENT.COM">mailto:tla@LUCENT.COM</A>]</FONT>
<BR><FONT SIZE=2>> Sent: Friday, April 13, 2001 6:31 AM</FONT>
<BR><FONT SIZE=2>> To: ITU-SG16@mailbag.cps.INTEL.COM</FONT>
<BR><FONT SIZE=2>> Subject: Re: ras address in RRQ/GRQ</FONT>
<BR><FONT SIZE=2>> </FONT>
<BR><FONT SIZE=2>> </FONT>
<BR><FONT SIZE=2>> This is of course the opposite of H.248 where replies must go </FONT>
<BR><FONT SIZE=2>> to source</FONT>
<BR><FONT SIZE=2>> address. But remember that there are requests (as opposed to confirms</FONT>
<BR><FONT SIZE=2>> and rejects) that are sent from GK to GW and the GK must know what</FONT>
<BR><FONT SIZE=2>> address to use. If no rasaddress were registered and ARQs </FONT>
<BR><FONT SIZE=2>> (for example)</FONT>
<BR><FONT SIZE=2>> came from various port numbers, the GK would have no idea </FONT>
<BR><FONT SIZE=2>> where to send</FONT>
<BR><FONT SIZE=2>> a DRQ, URQ, IRQ, etc.</FONT>
<BR><FONT SIZE=2>> </FONT>
<BR><FONT SIZE=2>> rasaddress is not optional in GRQ and so cannot be omitted. It is</FONT>
<BR><FONT SIZE=2>> probably not intended to be optional in RRQ although since it </FONT>
<BR><FONT SIZE=2>> is defined</FONT>
<BR><FONT SIZE=2>> as SEQUENCE OF TransportAddress and SEQUENCES can be of zero </FONT>
<BR><FONT SIZE=2>> length, it</FONT>
<BR><FONT SIZE=2>> is in effect optional. A comment probably should be added to make it</FONT>
<BR><FONT SIZE=2>> required for the above reason.</FONT>
<BR><FONT SIZE=2>> </FONT>
<BR><FONT SIZE=2>> "Paul E. Jones" wrote:</FONT>
<BR><FONT SIZE=2>> </FONT>
<BR><FONT SIZE=2>> > Francois, There is no requirement that RAS messages sent to a</FONT>
<BR><FONT SIZE=2>> > Gatekeeper have to be sent from the same port that it will </FONT>
<BR><FONT SIZE=2>> receive RAS</FONT>
<BR><FONT SIZE=2>> > messages. If it is not included, I would expect that the </FONT>
<BR><FONT SIZE=2>> results will</FONT>
<BR><FONT SIZE=2>> > be unpredictable. Some devices will probably assume an address and</FONT>
<BR><FONT SIZE=2>> > others will probably just reject the request. Paul</FONT>
<BR><FONT SIZE=2>> ></FONT>
<BR><FONT SIZE=2>> > ----- Original Message -----</FONT>
<BR><FONT SIZE=2>> > From: Francois Audet</FONT>
<BR><FONT SIZE=2>> > To: ITU-SG16@mailbag.cps.INTEL.COM</FONT>
<BR><FONT SIZE=2>> > Sent: Thursday, April 12, 2001 8:17 PM</FONT>
<BR><FONT SIZE=2>> > Subject: ras address in RRQ/GRQ</FONT>
<BR><FONT SIZE=2>> > Guys,What is the purpose of the rasAddress in GRQ and</FONT>
<BR><FONT SIZE=2>> > RRQ?Shouldn't it just be the originating IP address? Is the</FONT>
<BR><FONT SIZE=2>> > gatekeeper supposed to send the GCF and RCF to IP address</FONT>
<BR><FONT SIZE=2>> > indicated in the GRQ/RRQ, or is it supposed to send it to</FONT>
<BR><FONT SIZE=2>> > the source IP address (at the IP layer)?What if the RAS</FONT>
<BR><FONT SIZE=2>> > address is not included in the RRQ/GRQ?----François AUDET,</FONT>
<BR><FONT SIZE=2>> > Nortel Networksmailto:audet@nortelnetworks.com, tel:+1 408</FONT>
<BR><FONT SIZE=2>> > 495 3756</FONT>
<BR><FONT SIZE=2>> ></FONT>
<BR><FONT SIZE=2>> --</FONT>
<BR><FONT SIZE=2>> ------------------------------------------------------------</FONT>
<BR><FONT SIZE=2>> Terry L Anderson <A HREF="mailto:tla@lucent.com">mailto:tla@lucent.com</A></FONT>
<BR><FONT SIZE=2>> Tel:908.582.7013 Fax:908.582.6729</FONT>
<BR><FONT SIZE=2>> Pager:800.759.8352 pin 1704572 1704572@skytel.com</FONT>
<BR><FONT SIZE=2>> Lucent Technologies/ Voice Over IP Access Networks/ Applications Grp</FONT>
<BR><FONT SIZE=2>> Rm 2B-121, 600 Mountain Av, Murray Hill, NJ 07974</FONT>
<BR><FONT SIZE=2>> <A HREF="http://its.lucent.com/~tla" TARGET="_blank">http://its.lucent.com/~tla</A> (Lucent internal) <A HREF="http://www.gti.net/tla" TARGET="_blank">http://www.gti.net/tla</A></FONT>
<BR><FONT SIZE=2>> </FONT>
<BR><FONT SIZE=2>> </FONT>
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