Re: Traffic shaping on Cat3550

From: Wes Smith (wesmith@rogers.com)
Date: Wed Mar 24 2004 - 13:38:23 GMT-3


Hi Dave

<>
Sup 1A and 2 can only do Ingress policing. Egress policing was new on
the 6500 Sup720.
</>You may be able to configure a policy map, <><><>but there's no
hardware there to perform the action unless it's a 720.

</></></><><>Take a look at this Tac document</></>

http://www.cisco.com/en/US/products/hw/switches/ps700/products_tech_note09186a00801c8c4b.shtml#second

Wes

Dave Meyer wrote:

  I think the 6509 can do outbound policing......
  #sh run int vlan 30
  Building configuration...
  
  Current configuration : 111 bytes
  !
  interface Vlan30
   ip address 30.30.30.1 255.255.255.252
   ip pim sparse-mode
   service-policy output icmp
  end
  
  DL1-MSFC#sh pol
  DL1-MSFC#sh policy-map
   Policy Map icmp
    class icmp
        police 8000 1500 1500 conform-action transmit exceed-action drop
  
  DL1-MSFC#sh pol
  DL1-MSFC#sh policy-map int vlan 30
  
   Vlan30
  
    service-policy output: icmp
  
      class-map: icmp (match-all)
        0 packets, 0 bytes
        5 minute offered rate 0 bps, drop rate 0 bps
        match: access-group 177
        police:
          8000 bps, 1500 limit, 1500 extended limit
          conformed 0 packets, 0 bytes; action: transmit
          exceeded 0 packets, 0 bytes; action: drop
          violated 0 packets, 0 bytes; action: drop
          conformed 0 bps, exceed 0 bps violate 0 bps
  
      class-map: class-default (match-any)
        0 packets, 0 bytes
        5 minute offered rate 0 bps, drop rate 0 bps
        match: any
          0 packets, 0 bytes
          5 minute rate 0 bps

                        Wes Smith
                        < wesmith@rogers.c To: Richard Dumoulin < richard.dumoulin@vanco.es >
                        om> cc: ccielab@groupstudy.com
                        Sent by: Subject: Re: Traffic shaping on Cat3550
                        nobody@groupstudy
                        .com

                        03/23/04 08:56 AM
                        Please respond to
                        Wes Smith

  We had a very similar situation last year.
  You're correct... 3550 only polices. But at least it polices output,
  which a Cat6K Sup1/Sup2 can't do.
  
  At that time ... you were limited to (with cisco gear) the following
  devices that could shape.
  - An IOS Router
  - Cat4K with Sup IV
  - Cat6K with Sup720 (with the new line cards)
  - Cat6K/7600with OSM line card (Big $$$$$)
  - You can now look at the new 3750 Metro switch.. It's probably their
  most affordable high speed shaper
  
  For 4 Mbs you could use a regular router. A 2621XM might be big
  enough ..
  2951/2691/3700 would be better. We tested 7301s shaping up to 150Mbs
  with out problems.
  Wes
  
  Richard Dumoulin wrote:

    Hello group,

     Suppose we have a cat 3550 configured as a L3 switch connected to an ISP.
    The connection is at 100Mbps but the provider is rate limiting at 4 Mbps. I
    suppose the ISP is dropping all the traffic bursting beyond 4 Mbps. Also I
    suppose it is very easy to burst beyond 4 M if the link is configured at 100
    M ?
    
    What could you suggest as a solution. I would like Traffic Shaping but with
    Cat3550 it's only possible to do Traffic Policing no ?
    
    Thanks,
    
    Richard Dumoulin
    
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