Hey guy's just curious for suggestions on this.
We have remote sites connected by point-to-point full T-1's. We are running voice (IPT) over the T-1's and have prioritzed the traffic as ef as expected. Now heres the question. We have a critical business application that needs high priority almost as much as the voice traffic, but I don't want it interferring with the voice traffic. What would be a good DSCP value to mark the applications traffic?
normally your voice is given DSCP 46 (ef)= ip precedence 5 and your business app dscp 16 = IP precedence 2.
Depending on what class you have defined for voice signalling you could use af21 or af31. You would like the application lower than signalling since you wouldn't want the application to interfere with voice signalling either. If this is the only application which needs to be preferred af21 would suffice, but if you really consider the application to be close to voip af31 would be more suitable unless af31 is already used for voice signalling.
Currently we do have signaling as af31. If we more to af21 for the application will this hurt signaling?
If we have signaling at af31 and desire to leave it would af41 for the application proiritize it enough?
So if we currently have signaling at af31 we should leave it and give apps af21? Or are you saying to change the signaling value?
Would this config work for governing my voice and critical application?
class-map match-any Voice-Calls
match ip dscp ef
class-map match-any Voice-Call-Control
match dscp af31
class-map match-any Critial-Application
match access-group name Critical-Application
class-map match-any Telnet-Traffic
match protocol telnet
match protocol ssh
set dscp af21
Just marking doesn't always guarantee the traffic actually obtains higher priority. Conversely, on a p-2-p T-1, you really don't need to mark to deliver different service priorities.