[cisco-voip] sccp ip precedence

Jake Rybak jrybak at annese.com
Sun Jun 18 13:02:36 EDT 2006


With a default value of 5? So what you saying is that this command should
always be changed from the default?

I do not have a dspfarm in my lab so the router will not initiate any sccp
traffic to callmanager. I cannot get a capture.

My goal is to find out if this default value should be changed so the
packets will map to cs3.

-----Original Message-----
From: Ted Nugent [mailto:tednugent69 at yahoo.com] 
Sent: Sunday, June 18, 2006 11:13
To: Jake Rybak; cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] sccp ip precedence

Since SCCP is a signaling protocol I would guess that this is certainly for
signaling and not media.




--- Jake Rybak <jrybak at annese.com> wrote:

> Thanks. I just wanted to be 100% positive that it is changing the 
> voice stream and not signaling. I guess I could have just captured the 
> packets but I wasn't in place that it was possible.
> 
> As you know, MGCP and H323 you can choose signaling or media.
> 
> So being registered to a CM 3.3, the CM service parameter would 
> override this anyway? Not that you would want to.
> 
> 
> 
> 
> -----Original Message-----
> From: cisco-voip-bounces at puck.nether.net
> [mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Ted Nugent
> Sent: Saturday, June 17, 2006 23:49
> To: cisco-voip at puck.nether.net
> Subject: Re: [cisco-voip] sccp ip precedence
> 
> Yes, that's obviously a typo, if this is your first day with Cisco 
> docs then you might want to get used to it. If maybe you can give an 
> idea of what you're trying to accomplish then maybe we can try and 
> give you some guidance. By default at least in the Cisco world you can 
> expect voice control to be tagged as IPPrec of 3 (AF31 or CS3) and 
> media (rtp) as IP Prec
> 5 (EF). Unless you have a reason to mess with these values then why 
> bother?
> Again without knowing what you're trying to accomplish then it makes 
> it difficult to give you any sort of advice. BTW, IP Prec is old 
> school, the rest of the world uses DSCP?
> 
> 
> --- Jake Rybak <jrybak at annese.com> wrote:
> 
> > I have a question regarding the command: sccp ip
> precedence value
> > 
> >  
> > 
> >  
> > 
> > The documentation states "value = IP precedence
> value. Range is from 1
> > (highest) to 7 (lowest)." The following example
> sets IP precedence to
> > the highest possible value:
> > 
> > Router# sccp ip precedence 1
> > 
> >  
> > 
> > This is obviously a typo, no?
> > 
> >  
> > 
> > The default value makes it appear as though it
> would refer to media
> > streams.
> > 
> > 
> >  
> > 
> > This docs suggests it is the actual signaling.
> > 
> >  
> > 
> >
>
http://www.cisco.com/en/US/products/sw/iosswrel/ps5207/products_command_refe
> > rence_chapter09186a008045733b.html#wp1245396
> > 
> >  
> > 
> > This doc suggests voice streams.
> > 
> >  
> > 
> >
>
http://www.cisco.com/univercd/cc/td/doc/product/voice/c_access/vg_200/config
> > /dsp.htm#xtocid273628
> > 
> >  
> > 
> > I have always assumed it was the voice stream
> because of the default
> > value of 5.
> > 
> >  
> > 
> > Any clarification would be appreciated.
> > 
> >  
> > 
> > Thanks,
> > 
> >  
> > 
> > jake
> > 
> >  
> > 
> > > _______________________________________________
> > cisco-voip mailing list
> > cisco-voip at puck.nether.net
> >
> https://puck.nether.net/mailman/listinfo/cisco-voip
> > 
> 
> 
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