Hi here is a basic QOS config for a router. this assumes a 2MB wan link, Note this is just one way of doing the classification, You can also use NBAR to identify the classes of traffic.
comments in red
First step is to classify local traffic coming into the router from the local network.
class-map match-any DSCP-EF
match access-group name QOS_RT-VOICE < matches an access-list which would have correct UDP ports and Ip addresses
class-map match-any DSCP-AF41
match access-group name QOS_RT-VIDEO < matches an Access list with your video boxes
class-map match-any DSCP-CS3 < voice control traffic
match protocol skinny
match protocol sip
match protocol h323
match protocol mgcp
class-map match-any DSCP-AF21
match access-group name QOS_CITRIX < matches access list which contains Ip address and ports for Citrix hosts
policy-map QOS_IN < this is the Policy-map that is applied to inbound interfaces.
class DSCP-EF
set ip dscp ef
class DSCP-AF41
set ip dscp af41
class DSCP-CS3
set ip dscp cs3
class DSCP-AF21
set ip dscp af21
int gi 0/0 < interface to local network.
service-policy input QOS_IN
Next step create policy map for the WAN interface, The following class maps use the Markings that were created on the traffic from the local network.
class-map match-any CONTROL
match ip dscp cs3
class-map match-any QUEUE-TRANSACTIONAL
match dscp af21
class-map match-any RT-VOICE
match ip dscp ef
class-map match-any RT-VIDEO
match ip dscp af41
Below is the policy map for a 2Mbps WAN interface, you wouldneed to adjust the settings to match your particular requirements.
policy-map QOS_OUT_2MB
class RT-VOICE
priority percent 20
class RT-VIDEO
bandwidth percent 25
class CONTROL
bandwidth percent 3
class TRANSACTIONAL
bandwidth percent 20
random-detect dscp-based
class class-default
shape average 2000000 20000 20000
queue-limit 64 packets
random-detect dscp-based
random-detect dscp 0 32 64
interface GigabitEthernet0/1 < wan interface
service-policy output QOS_OUT_2MB
HTH
Richard.
