[c-nsp] VoIP QoS on Cisco Routers

[Jeremiah Millay]

Could you give an example of what you mean based on the configuration I 
gave? The only thing that really needs priority is our voice traffic, 
everything else is fine with WFQ.
Jeremiah

Tantsura, Jeff wrote:

>In other words shape parent policy to something you need for backpressure
>and configure LLQ in the child one
>
>--
>Jeff Tantsura  CCIE# 11416
>Senior IP Network Engineer
>
>
>-----Original Message-----
>From: Rodney Dunn [mailto:rodunn at cisco.com] 
>Sent: 29 September 2005 11:47
>To: Jeremiah Millay
>Cc: cisco-nsp at puck.nether.net
>Subject: Re: [c-nsp] VoIP QoS on Cisco Routers
>
>That configuration should work to have an LLQ class of
>1544 matching the asterisktraffic ACL.
>
>The problem most likely if there is one is with the
>backpressure coming from an ethernet interface signalling
>congestion to the policy. Monitor 'sh policy-map interface e0'
>and see what you get.
>
>You might need to try a HQOS configuration with a parent shaper
>and the child policy doing the queueing so the shaping (parent)
>policy kicks in for backpressure.
>
>Rodney
>
>On Wed, Sep 28, 2005 at 05:53:38PM -0500, Jeremiah Millay wrote:
>  
>
>>I've set up QoS on our office router for use with cisco 7960 phones. The 
>>phones connect to an external server. I guess I'd like to post my 
>>configs and get some feedback as to if I am doing QoS the right way. 
>>I've tried two variations of QoS. Not sure which is the most effective. 
>>Sometimes it seems as though it might not be working.
>>We are using the SIP protocol for call set up (UDP port 5060) and all of 
>>our voice RTP streams have been modified to use ports UDP 10000 through 
>>20000. I'm applying to the outbound interface on our router.
>>Here is my config:
>>
>>ip access-list extended asterisktraffic
>> remark RTP Streams
>> permit udp any any range 10000 20000
>> remark SIP Traffic
>> permit udp any any eq 5060
>>
>>!
>>class-map match-any VoIP
>>  match access-group name asterisktraffic
>>!
>>
>>policy-map lowlatency
>>  class VoIP
>>   priority 1544
>>  class class-default
>>   fair-queue
>>!
>>
>>interface Ethernet0
>> description public
>> ip address X.X.X.X X.X.X.X
>> full-duplex
>> service-policy output lowlatency
>> no cdp enable
>>!
>>
>>
>>
>>
>>I've also tried working with this config:
>>
>>
>>
>>access-list 105 permit udp any any range 10000 20000
>>access-list 105 permit udp any any eq 5060
>>access-list 106 permit tcp any any eq telnet
>>access-list 106 permit tcp any any eq 22
>>!
>>priority-list 1 protocol ip high list 105
>>priority-list 1 protocol ip medium list 106
>>!
>>!
>>interface Ethernet0
>> description public
>> ip address X.X.X.X X.X.X.X
>> full-duplex
>> priority-group 1
>> no cdp enable
>>!
>>
>>Any feed back is appreciated.
>>Jeremiah
>>
>>-- 
>>Rock River Internet                            Jeremiah Millay
>>202 W. State St, 8th Floor              jeremiah at rockriver.net
>>Rockford, IL 61101                      815-968-9888 Ext. 2202
>>USA                                               fax 968-6888
>>
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>>
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>  
>

-- 
Rock River Internet                            Jeremiah Millay
202 W. State St, 8th Floor              jeremiah at rockriver.net
Rockford, IL 61101                      815-968-9888 Ext. 2202
USA                                               fax 968-6888