Re: Concern on the M3UA SSNM request, DUPU.
prabath weerasinghe <[email protected]> Thu, 21 Jul 2016 18:00:58 +0530
| Newsgroups | gmane.ietf.sigtran |
|---|---|
| Message-ID | <CADgPoopoM3rFtw9xirEyfEwP-VBY6NqHXJX4aqf64qrv4zHWXQ@mail.gmail.com> |
--===============3885519758171641730== Content-Type: multipart/alternative; boundary=94eb2c05fefa816cd50538247df1 --94eb2c05fefa816cd50538247df1 Content-Type: text/plain; charset=UTF-8 Hi David, Thanks for the quick reply. I checked the MTP3 spec and got all cleared up. Thanks and Regards, On Thu, Jul 21, 2016 at 2:11 PM, David Laight <[email protected]> wrote: > Read the MTP3 spec and look at when UPU is sent. > > > > *From:* Sigtran [mailto:[email protected]] *On Behalf Of *prabath > weerasinghe > *Sent:* 21 July 2016 09:38 > *To:* [email protected] > *Subject:* [Sigtran] Concern on the M3UA SSNM request, DUPU. > > > > Hi All, > > > > I was referring the rfc4666 <https://tools.ietf.org/html/rfc4666> for > M3UA and have few concerns regarding the DUPU SSNM message. > > The specification says that a DUPU indicates the unavailability of a > certain user part. > > > > If I may quote; > > " The DUPU message is used by an SGP to inform concerned ASPs that a > > remote peer MTP3-User Part (e.g., ISUP or SCCP) at an SS7 node is > > unavailable" > > > > I have two questions. > > 1. How these concerned ASPs are identified. > > Is it upon receiving a MTP-Transfer for a particular user part (say > SCCP) or can it be sent periodically for a given ASP ? > > > > 2. I couldn't find any SSNM message that indicates a User Part's > Availability. Am I wrong here to expect such a message and if so how come > a concerned ASP know if a certain User Part is available at a given > point code. > > > > It would be an immense help if anyone could clarify the aforementioned > concerns. > > > > Thanks and Regards, > > > > -- > > Prabath Weerasinghe > > > > _________________________________________________________________________________ > Confidentiality and Disclaimer > > This email and any attachments are intended only for the person or entity > to whom it is addressed. Its contents may be privileged, confidential or > otherwise protected from disclosure. If you are not the intended recipient, > please do not read, disclose, distribute or copy this email or use the > information therein or act or omit to act in reliance thereof. Please also > inform the sender of erroneous receipt and delete the material from your > system. > Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 > 1PT, UK > Registration No: 1397386 (Wales) > > P *Please consider the environment and don't print this e-mail unless you > really need to* > -- Prabath Weerasinghe Department of Electrical Engineering University of Moratuwa Blog-*psawtech*talks.blogspot.com <http://psawtechtalks.blogspot.com/> _________________________________________________________________________________ Confidentiality and Disclaimer This email and any attachments are intended only for the person or entity to whom it is addressed. Its contents may be privileged, confidential or otherwise protected from disclosure. If you are not the intended recipient, please do not read, disclose, distribute or copy this email or use the information therein or act or omit to act in reliance thereof. Please also inform the sender of erroneous receipt and delete the material from your system. --94eb2c05fefa816cd50538247df1 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable <div dir=3D"ltr">Hi David,=C2=A0<div><br></div><div>Thanks for the quick re= ply. I checked the MTP3 spec and got all cleared up.</div><div><br></div><d= iv>Thanks and Regards,</div></div><div class=3D"gmail_extra"><br><div class= =3D"gmail_quote">On Thu, Jul 21, 2016 at 2:11 PM, David Laight <span dir=3D= "ltr"><<a href=3D"mailto:[email protected]" target=3D"_blank">Davi= [email protected]</a>></span> wrote:<br><blockquote class=3D"gmail_quo= te" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"= > <div lang=3D"EN-GB" link=3D"blue" vlink=3D"purple"> <div> <p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:"Ca= libri","sans-serif";color:#1f497d">Read the MTP3 spec and lo= ok at when UPU is sent.<u></u><u></u></span></p> <p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:"Ca= libri","sans-serif";color:#1f497d"><u></u>=C2=A0<u></u></spa= n></p> <div style=3D"border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm = 4.0pt"> <div> <div style=3D"border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0cm = 0cm 0cm"> <p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:10.0pt;fo= nt-family:"Tahoma","sans-serif"">From:</span></b><span = lang=3D"EN-US" style=3D"font-size:10.0pt;font-family:"Tahoma",&qu= ot;sans-serif""> Sigtran [mailto:<a href=3D"mailto:sigtran-bounces@iet= f.org" target=3D"_blank">[email protected]</a>] <b>On Behalf Of </b>prabath weerasinghe<br> <b>Sent:</b> 21 July 2016 09:38<br> <b>To:</b> <a href=3D"mailto:[email protected]" target=3D"_blank">sigtran@ie= tf.org</a><br> <b>Subject:</b> [Sigtran] Concern on the M3UA SSNM request, DUPU.<u></u><u>= </u></span></p> </div> </div><div><div class=3D"h5"> <p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p> <div> <p class=3D"MsoNormal"><span style=3D"font-family:"Arial","s= ans-serif"">Hi All,</span><u></u><u></u></p> <div> <p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p> </div> <div> <p class=3D"MsoNormal"><span style=3D"font-family:"Arial","s= ans-serif"">I was referring the=C2=A0<a href=3D"https://tools.ietf.org= /html/rfc4666" target=3D"_blank">rfc4666</a>=C2=A0for M3UA and have few con= cerns regarding the DUPU SSNM message.=C2=A0</span><u></u><u></u></p> </div> <div> <p class=3D"MsoNormal"><span style=3D"font-family:"Arial","s= ans-serif"">The specification says that a DUPU indicates the=C2=A0unav= ailability=C2=A0of a certain user part.</span><u></u><u></u></p> </div> <div> <p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p> </div> <div> <p class=3D"MsoNormal"><span style=3D"font-family:"Arial","s= ans-serif"">If I may quote;</span><u></u><u></u></p> </div> <div> <p class=3D"MsoNormal"><span style=3D"font-family:"Arial","s= ans-serif";background:#cccccc">"=C2=A0<span style=3D"color:black"= >The DUPU message is used by an SGP to inform concerned ASPs that a</span><= /span><u></u><u></u></p> </div> <pre><span style=3D"font-family:"Arial","sans-serif";co= lor:black;background:#cccccc"> remote peer MTP3-User Part (e.g., ISUP or SC= CP) at an SS7 node is<u></u><u></u></span></pre> <pre><span style=3D"font-family:"Arial","sans-serif";co= lor:black;background:#cccccc"> unavailable"</span><span style=3D"color= :black"><u></u><u></u></span></pre> <div> <p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p> </div> <div> <p class=3D"MsoNormal">I have two questions.<u></u><u></u></p> </div> <div> <p class=3D"MsoNormal">1.=C2=A0 How these concerned ASPs are identified.=C2= =A0<u></u><u></u></p> </div> <div> <p class=3D"MsoNormal">=C2=A0 =C2=A0 =C2=A0Is it upon receiving a MTP-Trans= fer for a particular user part (say SCCP) or can it =C2=A0 =C2=A0 =C2=A0be = sent periodically for a given ASP ?<u></u><u></u></p> </div> <div> <p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p> </div> <div> <p class=3D"MsoNormal">2. I couldn't find any SSNM message that indicat= es a User Part's =C2=A0Availability. Am I wrong here to expect such a m= essage and if so how come a concerned ASP know if a =C2=A0 =C2=A0 certain U= ser Part is available at a given point code.<u></u><u></u></p> </div> <div> <p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p> </div> <div> <p class=3D"MsoNormal">It would be an immense help if anyone could clarify = the aforementioned concerns.<u></u><u></u></p> </div> <div> <p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p> </div> <div> <p class=3D"MsoNormal">Thanks and Regards,<br clear=3D"all"> <u></u><u></u></p> <div> <p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p> </div> <p class=3D"MsoNormal">-- <u></u><u></u></p> <div> <div> <p class=3D"MsoNormal"><span style=3D"color:#666666">Prabath Weerasinghe</s= pan><u></u><u></u></p> </div> <div> <p class=3D"MsoNormal"><span style=3D"font-family:"Arial","s= ans-serif";color:#666666"><br> ___________________________________________________________________________= ______<br> </span><span style=3D"font-family:"Verdana","sans-serif"= ;;color:gray">Confidentiality and Disclaimer<br> <br> This email and any attachments are intended only for the person or entity t= o whom it is addressed. Its contents may be privileged, confidential or oth= erwise protected from disclosure. If you are not the intended recipient, pl= ease do not read, disclose, distribute or copy this email or use the information therein or act or omit to act in= reliance thereof. Please also inform the sender of erroneous receipt and d= elete the material from your system.</span><u></u><u></u></p> </div> </div> </div> </div> </div></div></div> </div> <div><span style=3D"color:#484830;font-family:Tahoma;font-size:xx-small">Re= gistered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT= , UK<br>Registration No: 1397386 (Wales)</span></div> <div> <p align=3D"center"><span style=3D"color:#008000;font-family:Arial"><span s= tyle=3D"font-size:xx-small"><span style=3D"font-family:Webdings">P </span><= strong>Please consider the environment and don't print this e-mail unle= ss you really need to</strong></span></span></p> </div></div> </blockquote></div><br><br clear=3D"all"><div><br></div>-- <br><div class= =3D"gmail_signature" data-smartmail=3D"gmail_signature"><div><font color=3D= "#666666">Prabath Weerasinghe</font></div><div><font color=3D"#666666">Depa= rtment of Electrical=C2=A0Engineering</font></div><div><font color=3D"#6666= 66">University of Moratuwa</font></div><div><font color=3D"#666666">Blog-<s= pan style=3D"font-family:arial,sans-serif;line-height:15px"><a href=3D"http= ://psawtechtalks.blogspot.com/" target=3D"_blank"><b>psawtech</b>talks.blog= spot.com</a><br><br>_______________________________________________________= __________________________<br></span></font><font color=3D"Gray" face=3D"Ve= rdana">Confidentiality and Disclaimer<br> <br> This email and any attachments are intended only for the person or=20 entity to whom it is addressed. Its contents may be privileged,=20 confidential or otherwise protected from disclosure. If you are not the=20 intended recipient, please do not read, disclose, distribute or copy this email or use the information therein or act or omit to act in reliance thereof. Please also inform the sender of erroneous receipt and delete the material from your system.</font><br></div></div> </div> --94eb2c05fefa816cd50538247df1-- --===============3885519758171641730== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ Sigtran mailing list [email protected] https://www.ietf.org/mailman/listinfo/sigtran --===============3885519758171641730==--