Re: Conceptual doubt between an ASP and SGP

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Brian,

RFC-2719 seems to be too technical for the use-case we are trying to
understand :)
I would rather present (a simplified version of) our use-case.

*
We have 3 nodes - N1, N2, N3.

*
We need to transfer messages in-between N1 and N3.

*
There is an IPSP-IPSP association each between between N1 <-> N2, and N2
<-> N3 (but no IPSP-IPSP association between N1 <-> N3).

*
Also, provisions for GTT are available at each of N1, N2 and N3.



Theoritically/Practically, would the above configuration work? Or is it
necessary to have a SGP configured at N2?


Looking forward to clarifications.


Thanks and Regards,
Ajay



On Thu, Mar 13, 2014 at 12:47 PM, Brian F. G. Bidulock <[email protected]
> wrote:

> Ajay,
>
> Please see comments below...
>
> Ajay Garg wrote:                              (Thu, 13 Mar 2014 11:48:19)
> >    Hi all.
> >    I am an absolute newbie in telecom domain, so kindly forgive me if I
> >    sound incredibly stupid.
> >    From what I understand, an ASP is a process running on an AS, and a
> SGP
> >    is a process running on a SG.
>
> Not quite.  See RFC 4666 "1.2 Terminology" for a definition of ASP,
> AS, SGP and SG.
>
> >    Each ASP <-> SGP link is a SCTP connection.
> >    Also, I understand that SGP is responsible for message-routing, while
> >    an ASP is merely an end-point for a SCTP connection.
> >    Given that, are there any extra differences between a ASP and SGP (in
> >    addition to the routing-capabilities of a SGP)?
> >    I will be grateful for any pointers/clarifications.
>
> RFC 4666 describes for 124 pages the differences between ASP and SGP.
>
> BTW, it is not an SGP per se that has routing capabilities, but an
> SG, where the SG is made up of some SGP, an SS7 stack and a
> interworking function.
>
> See also RFC 2719 "Framework Architecture for Signaling Transport"
> for a better overview of what's going on.
>
> --brian
>
> --
> Brian F. G. Bidulock
> [email protected]
> http://www.openss7.org/
>



-- 
Regards,
Ajay

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<div dir=3D"ltr"><div><div><div><div>Brian,<br><br></div>RFC-2719 seems to =
be too technical for the use-case we are trying to understand :)<br></div>I=
 would rather present (a simplified version of) our use-case.<br><br></div>
*<br>We have 3 nodes - N1, N2, N3.<br><br></div><div>* <br>We need to trans=
fer messages in-between N1 and N3.<br><br></div><div>*<br>There is an IPSP-=
IPSP association each between between N1 &lt;-&gt; N2, and N2 &lt;-&gt; N3 =
(but no IPSP-IPSP association between N1 &lt;-&gt; N3).<br>
<br></div><div>*<br>Also, provisions for GTT are available at each of N1, N=
2 and N3.<br><br><br><br></div><div>Theoritically/Practically, would the ab=
ove configuration work? Or is it necessary to have a SGP configured at N2?<=
br>
<br><br></div><div>Looking forward to clarifications.<br><br><br></div><div=
>Thanks and Regards,<br>Ajay<br></div><div><br></div><div class=3D"gmail_ex=
tra"><br><br><div class=3D"gmail_quote">On Thu, Mar 13, 2014 at 12:47 PM, B=
rian F. G. Bidulock <span dir=3D"ltr">&lt;<a href=3D"mailto:bidulock@openss=
7.org" target=3D"_blank">[email protected]</a>&gt;</span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">Ajay,<br>
<br>
Please see comments below...<br>
<br>
Ajay Garg wrote: =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =
=A0(Thu, 13 Mar 2014 11:48:19)<br>
<div class=3D"">&gt; =A0 =A0Hi all.<br>
&gt; =A0 =A0I am an absolute newbie in telecom domain, so kindly forgive me=
 if I<br>
&gt; =A0 =A0sound incredibly stupid.<br>
&gt; =A0 =A0From what I understand, an ASP is a process running on an AS, a=
nd a SGP<br>
&gt; =A0 =A0is a process running on a SG.<br>
<br>
</div>Not quite. =A0See RFC 4666 &quot;1.2 Terminology&quot; for a definiti=
on of ASP,<br>
AS, SGP and SG.<br>
<div class=3D""><br>
&gt; =A0 =A0Each ASP &lt;-&gt; SGP link is a SCTP connection.<br>
&gt; =A0 =A0Also, I understand that SGP is responsible for message-routing,=
 while<br>
&gt; =A0 =A0an ASP is merely an end-point for a SCTP connection.<br>
&gt; =A0 =A0Given that, are there any extra differences between a ASP and S=
GP (in<br>
&gt; =A0 =A0addition to the routing-capabilities of a SGP)?<br>
&gt; =A0 =A0I will be grateful for any pointers/clarifications.<br>
<br>
</div>RFC 4666 describes for 124 pages the differences between ASP and SGP.=
<br>
<br>
BTW, it is not an SGP per se that has routing capabilities, but an<br>
SG, where the SG is made up of some SGP, an SS7 stack and a<br>
interworking function.<br>
<br>
See also RFC 2719 &quot;Framework Architecture for Signaling Transport&quot=
;<br>
for a better overview of what&#39;s going on.<br>
<span class=3D"HOEnZb"><font color=3D"#888888"><br>
--brian<br>
<br>
--<br>
Brian F. G. Bidulock<br>
<a href=3D"mailto:[email protected]">[email protected]</a><br>
<a href=3D"http://www.openss7.org/" target=3D"_blank">http://www.openss7.or=
g/</a><br>
</font></span></blockquote></div><br><br clear=3D"all"><br>-- <br>Regards,<=
br>Ajay<br>
</div></div>

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