Hello,
I am new to QOS
configurations. I have to configure QOS on  few routers. The set up is
basically simple, most sites have 5 Mbps and I just need to reserve 1
Mbps for voice, all other traffic goes to class-default queue. I've
done the following configuration on the router. Can anyone tell me if
it's ok and if it will work in case I of congestion?
Thanks
class-map match-any voice-out
 match access-group name real-time
policy-map qos-policy
 class voice-out
    priority 1000
interface GigabitEthernet0/0
 bandwidth 5000
 ip address 172.29.157.3 255.255.255.128
 shutdown
 duplex auto
 speed auto
 no cdp enable
 service-policy output qos-policy
ip access-list extended real-time
 remark rtp
 permit udp any any range 16384 32767
 remark SCCP
 permit tcp any any range 2000 2002
 permit tcp any range 2000 2002 any
 remark h323
 permit tcp any any eq 1720
 permit tcp any eq 1720 any

Hi Muca,

As per the configuration it should work as class map is created with acl for voice ports and same is applied with policy map,just for information difference between bandwidth and pirority in qos isdescribed below so that you can use as per your convienent.

Bandwidth command as the "amount of bandwidth, in kbps, to be assigned to the class.To specify or modify the bandwidth allocated for a class belonging to a policy map." The bandwidth command provides a minimum bandwidth guarantee during congestion.

Priority command as       reserving "a priority queue with a specified amount of available bandwidth for  traffic, During congestion conditions, the traffic class is guaranteed bandwidth equal to the specified rate. (Recall that bandwidth guarantees are only an issue when an interface is congested.) In other words, the priority command provides a minimum bandwidth guarantee.

Hope to Help !!

Ganesh.H