[cisco-voip] Cisco IOS dial-peers AF31 (default) change to CS3

[UC Penguin]

There is the dscp-profile command under voice services voip -> sip

Never used it but if it’s going to be somewhere I’d expect it to be there.

> On Apr 23, 2020, at 14:55, Anthony Holloway <avholloway+cisco-voip at gmail.com> wrote:
> 
> 
> Well Scuba Jason,
> 
> IOS has always marked control traffic as AF31, as well as SCCP control traffic for registered media resources.
> 
> The two things I have seen recommended and done are:
> 
> 1. Change the settings per dial-peer / sccp config (technically this is ip precedence 3, which aligns loosely with cs3, as they share the first 3 bits)
> 2. Use a match-any for cs3 and af31 in your class maps
> 
> From the QoS SRND:  
> 
> "The QoS Baseline recommends marking Call-Signaling to CS3. However, currently most Cisco IP Telephony products mark Call-Signaling to AF31. A marking migration from AF31 to CS3 is under way within Cisco, but in the interim it is recommended that both AF31 and CS3 be reserved for Call-Signaling and that Locally-Defined Mission-Critical Data applications be marked to a temporary placeholder non-standard DSCP, such as 25. Upon completion of the migration, the QoS Baseline marking recommendations of CS3 for Call-Signaling and AF31 for Locally-Defined Mission-Critical Data applications should be used. These marking recommendations are more in line with RFC 2474 and RFC 2597."
> 
> Source
> 
> Though, this "transition period" seems to have gone on indefinitely.
> 
> FWIW, I have never seen a global command to switch it, and the documentation doesn't tell us that there is one for dial-peer signaling.  The sccp command is global.
> 
> Stay buoyant!
> 
>> On Thu, Apr 23, 2020 at 1:55 PM Jason Aarons <scubajasona at gmail.com> wrote:
>> CallManager marks control traffic as CS3, but just see that IOS-XE on 4431 16.09.05 marks control as AF31 by default.  
>> 
>> Is there a global IOS command to change IOS-XE to use CS3 ? Rather then on a per dial-peer level?
>> 
>> All my class maps to protect control are based on CS3.
>> 
>> Hope all is well here.  Work changed emails couple times and that created challenges! I still read every week, but changed emails so I can actually reply again!
>> 
>> -jason
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