Hi Nick,
You want something like this:
class-map match-all VoIP-Control
match protocol sip
match access-group 101
class-map match-all VoIP-Data
match dscp ef/match precedence 5/match protocol rtp **
match access-group 101
access-list 101 permit ip any host 202.x.VOIP.PROXY
policy-map QOS-OUT
class VoIP-Control
bandwidth 60
class VoIP-Data
priority percent 50
class class-default
fair-queue 2048
then apply the policy-map to your interface like so "service-policy output
QOS-OUT"
Make sure you have a bandwidth statement set on your interface "bandwidth x"
where x is in kilobits.
The value in the classes under the policy-map: "bandwidth 60" is saying
guarentee this much bandwidth in kilobits to this particular class.
The value in the classes under the policy-map: "priority percent 50" is
saying give 50 percent of the bandwidth you specified in your bandwidth
statement on your interface LLQ(low latency queuing) to this class, you want
to use priority for your real time traffic (ie the rtp stream), bandwidth is
fine for the normal control traffic and other traffic ie www etc. if you
were wanting to prioritise that.
You would modify these bandwidth and priority values to your needs based on
the number of simultaneous calls you plan to offer.
** pick one that best suits you, if your voip equipment is marking a tos bit
then great, otherwise match protocol rtp should work unless you are on an
old IOS.
You can't QoS inbound so to speak, best you can do is police traffic, I
suggest you not worry about this for now as for VoIP to be effective the QoS
has to be bi-directional so the other end should be matching you aswell.
Ben
----- Original Message -----
From: "Nick Voth" <[EMAIL PROTECTED]>
To: <cisco-nsp@puck.nether.net>
Sent: Tuesday, July 22, 2008 5:39 AM
Subject: [c-nsp] QoS for VoIP to specific proxy
Hello folks,
Please pardon me asking what I'm sure has been answered before. I've
looked
through the archives and the Cisco site, but I'm still confused about what
I
need to do.
I have a client who's Cisco 1841 CPE router needs to simply prioritize SIP
traffic to and from a specific VoIP proxy.
Let's say the VoIP proxy is 209.120.xxx.xxx
The customer's current config on their 1841 is below. Can someone give me
an
idea of how I can accomplish this? Remember, I just basically need
priority
queuing of any traffic to and from that VoIP proxy listed above
Thanks very much for any help!
-Nick Voth
---------Customer's CPE config------------>>>>
interface FastEthernet0/0
ip address 67.101.xxx.xxx 255.255.255.248
duplex auto
speed auto
no keepalive
!
!
interface Serial0/0/0
no ip address
encapsulation frame-relay IETF
no ip mroute-cache
service-module t1 timeslots 1-24
service-module t1 fdl both
frame-relay lmi-type ansi
!
interface Serial0/0/0.1 point-to-point
frame-relay interface-dlci 16 ppp Virtual-Template1
!
interface Virtual-Template1
ip address negotiated
ppp chap hostname xxxxx
ppp chap password 7 01465656080E535773
ppp ipcp dns request
ppp ipcp route default
ppp ipcp address accept
----------
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