How to make the Cisco VOIP settings for 1921 Router

We have a new VOIP phone install performed by ATT using Shoretel phones. We have a branch located across a 1.5MB T1 line with 1921's at each end.

As you can imagine, we are having some voice issues across the link and I need to get QoS set up between the two routers.

One of our techs has done this on an older router by defining ports using nbar and prioritizing that way.    I am not too knowledgable in Cisco routing and definately not in QoS, so please bear with me.

We ran the QoS wizard on the 1921 and got the following output:

Configuration commands for the router: 192.168.41.10

saved on Dec 9, 2011 2:53:44 PM

class-map match-any CCP-Transactional-1

class-map match-any CCP-Management-1

class-map match-any CCP-Routing-1

class-map match-any CCP-Signaling-1

class-map match-any CCP-Voice-1

policy-map CCP-QoS-Policy-1

 class CCP-Voice-1

  set dscp ef

  priority percent 50

  exit

 class CCP-Signaling-1

  set dscp cs3

  bandwidth percent 5

  exit

 class CCP-Routing-1

  set dscp cs6

  bandwidth percent 5

  exit

 class CCP-Management-1

  set dscp cs2

  bandwidth percent 5

  exit

 class CCP-Transactional-1

  set dscp af21

  bandwidth percent 5

  exit

 class class-default

  fair-queue

  random-detect

  exit

 exit

interface Serial0/0/0

 ip nbar protocol-discovery

 service-policy output CCP-QoS-Policy-1

 exit

Now, I assume I need to modify this section "class-map match-any CCP-Voice-1

" to define the ports that are used by the Shoretel system to prioritize that traffic between the routers.  I have researched and cannot find anything as to how to tell the router to priorotize specific port traffic.

Does anyone know the correct commands or structure to type? Or am I completely wrong in how this should be done? If so, can anyone point me in the right direction?

The solution

In the Shoretel Director set the Diffserv value to 184 (under Call Control -> Options)

In the Cisco device.... configure EVERY port (for director + all phones + all trunks) to

interface x/x

qos trust dscp

or

mls qos trust dscp

Create access list to map Shoretel ports

access-list 100 remark Shoretel VoIP

access-list 100 permit udp any any eq 2427

access-list 100 permit udp any any eq 2727

access-list 100 permit udp any any range 5440 5446

access-list 101 remark Shoretel Director

access-list 101 permit udp host IP_ADDRESS_OF_DIRECTOR gt 1024 any gt 1024

Add the match statements to the Voice Priority Queue created by wizard

class-map match-any CCP-Voice-1

 match ip dscp ef

 match access-group 100

 match access-group 101

You might consider bumping up the priority percent - based on the amount of concurrent calls/codecs in use/bandwidth required.

SHOW the output of the service policy to confirm

show policy int x/x

Should see tagged packets increasing in the queue - and hopefully no drop ;>

-d

Customers interested in purchasing Cisco router or the price, please refer to below links:

Cisco 1921 price

Cisco 1941 price

Cisco 2901 price