2013年6月6日星期四

QOS on 3560's Problem


Hello Experts

I am replacing some WAN Catalyst 3560X  connections: Point to Point T1's (running from 2820's to a 7200).  I am replacing them with metro Ethernet connections with a 3560 layer 3 switch at each end.  We run Cisco Call Manager, and have IP phones at our locations.  I want to set up QOS on my WAN connection to make sure my packets arrive in the correct order.  I have a few remote users complaining of voice problems, crackling, etc.  The 3560's are acting as routers, and don't directly connect to all the phones.  So I won't be using the mls/auto QOS features, I don't think.  I am trying to use service-policies and class-maps to handle qos, as I have done in the past, but I'm not finding the correct commands.  This is the QOS I currently have set up on my 7200/2820:

class-map match-any voip-control
  match ip dscp af31
class-map match-any voip-rtp
  match ip dscp ef
!
!
policy-map my-voice
  class voip-rtp
    priority 512
  class voip-control
   bandwidth percent 5
  class class-default
   fair-queue

I can create the class-maps on my 3560's, but when I start trying to modify the class settings under the policy-maps, the commands like "priority", "bandwidth", and "fair-queue" are not available.  These are the options at the (config-pmap-c)# prompt:

QoS policy-map class configuration commands:
  exit            Exit from QoS class action configuration mode
  no              Negate or set default values of a command
  police          Police
  service-policy  Configure QoS Service Policy
  set             Set QoS values
  trust           Set trust value for the class
  <cr>


Perhaps I am trying to do this the old way, but I'm just looking to set up some QOS on these switches.  These switches are running a mix of
ip base and ip services IOS versions.  Can anyone help me with the right syntax to setup QOS?

The supplier 3Anetwork.com can help but their technical support charge is a bit high, WS-C3750X-48T-S so I would prefer to do by myself.

Thanks for your help.

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