[c-nsp] RE. Cisco 3750 Rate limit

[Peter Nyamukusa]

> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-
> bounces at puck.nether.net] On Behalf Of Tom Storey
> Sent: 18 December 2007 12:11 PM
> To: Michalis Palis
> Cc: cisco-nsp at puck.nether.net
> Subject: Re: [c-nsp] RE. Cisco 3750 Rate limit
> 
> 
> On 18/12/2007, at 6:22 PM, Michalis Palis wrote:
> 
> > Hello all
> >
> > I configure a policer to limeit traffic to 50Mbs as below but as
> > soon as I
> > apply the service policy, their is a traffic drop on the interface.
> > Any
> > suggestion?
> >
> > Here is my config
> >
> >
> > mls qos
> > !
> > class-map match-any test-policing
> >  match access-group 100
> > !
> > !
> > policy-map test-policing
> >  class test-policing
> >    police 50000000 20000 exceed-action drop

You can try to shape the traffic to 50Mb rather than policing or you can
reclassify the exceeding traffic instead of dropping it then shape it. 

Cheers,
--------------------------------------------
Peter Nyamukusa
MCSE, MCSA:messaging, MCSA, MCP, CCIP, CCNA, A+, JNCIA, JNCIS
Technical Manager
Africa Online Swaziland
Tel:  +268 404 4705
Cell: +268 647 6448
Fax: +268 404 4783
Email: petern at africaonline.co.sz
AIM: petenya

A member of the Telkom South Africa Group

> >
> > interface GigabitEthernet1/0/12
> > switchport access vlan 261
> > switchport mode access
> > service-policy input test-policing
> >
> > access-list 100 permit ip any any
> >
> > Any suggestion??
> > Thanks
> 
> Perhaps try increasing the burst size.
> 
> Should I understand this topic correctly:
> 
> Your current burst size is set to 20kbytes which means that at most,
> traffic will increase by 20kbytes each second. This means it will take
> roughly 5 or so minutes to reach the full 50mbit rate-limit.
> 
> Try setting it to something like 512000 (512kbyte), this will allow
> traffic levels to reach 50mbit relatively quickly (roughly 12 seconds).
> 
> Tune as required.
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