BlankThanks Cliff, My goal is to actually configure QoS on incoming and outgoing traffic on the FE interfaces connected to the IP Phones just like you will do on the ports connecting to IP Phones on the 6509 or the 3550.
>mls qos trust cos >switch priority extend cos 0 Takes care of the incoming traffic; but should there be a PC connected to the Phone's pc-port (or if you are told to assume that a pc is connected to the phone pc-port); then configuring outgoing queues and making sure that the voice traffic is given the highest priority as packets exists that interface is in order and should be done. Designating the voice traffic's queue as a priority queue is recommended as per the QoS SRND, this can be achieved at the interface level on the 3550/3560 via (e.g. 'priority-queue out') and on the 6509, one have to map cos 5 to the priority queue (e.g. 'set qos map 1p2q2t tx 3 1 cos 5') I have seen what I was looking for: With the NM-16ESW; one can accomplish the same thing on the global configuration mode; whereas in the regular 3550/3560 it has to be done in the interface mode. http://www.cisco.com/en/US/products/hw/modules/ps2797/products_configuration_example09186a00808066b8.shtml#configuration1 It appears that on a NM-16ESW module, the default configuration designates queue 4 as a priority queue; but in 3550/3560, things are done differently. Note that; where applicable I will still configure my LLQ, LFI, Traffic shapping, etc on the WAN-outgoing serial interface. Tech Guy ----- Original Message ----- From: Cliff McGlamry To: [email protected] Sent: Saturday, April 04, 2009 1:44 PM Subject: Re: [OSL | CCIE_Voice] How To Configure IP Phone QoS on NM-16ESWModulein a Router? Think for a moment about what you are asking. The priority queue is an outbound queue. With an ESW, it's connected directly to the router. The priority queue gets put on the serial interface headed out. There is zero point in putting a priority queue on the inbound side of an interface. The ESW was designed for connecting end point devices in a small office scenario. What you can do with an ESW is map COS to DSCP (which helps when you're setting up shaping and queuing. It will accept the following: mls qos trust cos switch priority extend cos 0 Those, combined with the overall map command: mls qos map cos-dscp 0 8 16 24 32 46 48 56 is about it. mls qos is on by default. If you really want to do the queueing you're discussing, you'd apply them INBOUND on the vlan interface. ----- Original Message ----- From: Tech Guy To: [email protected] Sent: Saturday, April 04, 2009 12:17 PM Subject: [OSL | CCIE_Voice] How To Configure IP Phone QoS on NM-16ESW Modulein a Router? Hi, I am using a NM-16ESW (16 port FE module) in my branch one 3725 (IOS 12.4(15)T5) Router to connect to my branch one phones; I am finding it difficult to do everything I have so far taken for granted in a 3550 switchport. e.g I want to enable MLS QoS; configure COS-DSCP mapping; reconfigure the WRR Queue and put Voice on queue 4 and then configure queue 4 are a strict priority queue; all these is fine when you do it in the 3550; but I can't on the 16 port FE module: BR1(config)#mls qos ? map qos map keyword BR1(config)#int fa1/0 BR1(config-if)# BR1(config-if)#wrr-queue ? % Unrecognized command BR1(config-if)#priority-queue ? % Unrecognized command BR1(config-if)# Thanks. Tech Guy Godswill Oletu CCIE #16464 (R&S)
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