Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. If you'd prefer to explore, try our test area to get started. And see here for current known issues.

New Member

QOS Configuration not working...

Hello,

I have Snom phones that do SIP / RTP and connect to an Asterisk server.

The following configuration I have tried does not seem helpful..please help!

#Access-list with Snom SIP & RTP

ip access-list extended voip-traff

permit udp any any range 5060 5061

permit udp any any range 10000 20000

#class-map named ipphone & match acl voip-traff:

class-map match-any ipphone

match access-group name voip-traff

#Policy map named voip, match class-map iphone:

policy-map voip

class ipphone

set dscp cs5

#set interfaces to police policy-map voip:

interface-range gi 0/1 - 48

service-policy input voip

#enable qos globally:

mls qos

#map out QOS to COS-DSCP

#or mls qos map cos-dscp 0 8 16 24 32 40 46 48

Please help!

2 REPLIES
Anonymous
N/A

Re: QOS Configuration not working...

Are the VOIP phones currently sending at a certain DSCP value?

How are you verifying that the DSCP values aren't being set properly?

Can you send a "show policy-map int " on an interface that is positively getting and receiving traffic?

New Member

Re: QOS Configuration not working...

how about this:

ip access-list extended voip-traffic

permit udp any any range 5060 5061 <-SIP

permit udp any any range 16384 32767 <-RTP

class-map match-all class_ipphone

match access-group name voip-traffic

policy-map pol_voice

class class_ipphone

set dscp ef

class class-default

set descp 0

int-range gi0/1 - 48

service-policy input pol_voice

mls qos

mls qos map cos-dscp 0 8 16 24 32 46 48 56

This way, it will identify all RTP/SIP traffic from such interface which phones connected, then assign them with appropriate dscp value, inside switch itself, it will use internal CoS-DSCP map to adjust 'CoS-5' to 'DSCP-46' for all following traffics flow.

Also run:

show policy-map int gi0/1 input

to see marking result

Please rate if help

James

208
Views
0
Helpful
2
Replies