QOS Problem on Cisco 878

By fandre22 ·
Tags: Networking
I encounter some difficulties to set a QOS which enables to free space for default-class, when Priority queues are empty.

Here is the configuration I've made :

access-list 199 remark equipements VOIP
access-list 199 permit ip any
access-list 199 deny ip any any

access-list 198 remark equipements VISIO
access-list 198 permit ip any
access-list 198 deny ip any any

class-map match-all voip
match access-group 199
class-map match-all prec-voip
match ip precedence 5
class-map match-all visio
match access-group 198
class-map match-all prec-visio
match ip precedence 4

policy-map QOS
class prec-voip
priority 200
class prec-visio
priority 200
class class-default
bandwitdh percent 20

policy-map tag
class voip
set ip precedence 5
class visio
set ip precedence 4

interface vlan1
service-policy input tag

interface dialer0
bandwidth 512
service-policy output QOS

The service policy has no effect on traffic (with show policy-map int dia0)
I've also tried to apply service-policy on ATM0, but it's impossible to do it when we use encapsulation aal5mux ppp dialer.

I've also tried to make this configuration , but no effect :

Device(config)# policy-map childExample
Device(config-pmap)# class voice
Device(config-pmap-c)# priority percent 30
Device(config-pmap-c)# exit

Device(config-pmap)# class video
Device(config-pmap-c)# bandwidth percent 50
Device(config-pmap-c)# exit

Device(config-pmap)# class class-default
Device(config-pmap-c)# fair-queue
Device(config-pmap-c)# exit

Device(config)# policy-map parent
Device(config-pmap)# class class-default
Device(config-pmap-c)# shape average 1000000
Device(config-pmap-c)# service-policy child
Device(config-pmap-c)# exit

Device(config)# interface dialer 0
Device(config-if)# service-policy output parent

Here is the IOS version used :c870-advipservicesk9-mz.124-24.T2.bin
Do you know if there some improvements in QOS with newest IOS versions ?

Thanks in advance for any help on this topic.

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