[c-nsp] Quick rate-limit question..

[Rafi Sadowsky]

## On 2004-08-26 02:41 -0400 James typed:

J> Hi folks,
J> 
J> I've been hearing that when CAR is applied on an interface (the rate-limit
J> command under interface instead of MQC command), the router searches for
J> rate-limit settings in a linear lookup, where large number of interfaces can
J> slow down the throughput.. Is this true?
J> 
J> I have a situation w/ an edge router that has about 100 dot1q vlan interfaces 
J> on it and a few needs have been brought up to our attention that require
J> CAR on some of the interfaces.. Being a bit conservative, I'm just wondering
J> of the implications in the 'linear-search' effect I've been hearing about.
J> If that is true however, would using MQC policer be a right alternative?

 MQC seem to be the Cisco recommendation

Quote from:
<http://www.cisco.com/en/US/customer/tech/tk543/tk545/technologies_tech_note09186a00800d7276.shtml#topic2>

 Cisco recommends using the modular QoS CLI features when possible to
implement quality of service in your network. Use class-based policing
through the police command in a service policy to implement rate limiting
without buffering or queuing.
 >>>> Avoid using CAR, <<< 
for which no new features or functionality is planned.
 Cisco will continue to support CAR for existing implementations using
this method.



-- 
HTH,
	Rafi

J> 
J> Thanks!
J> -J
J> 
J>