[c-nsp] Queueing strategy

[Mark Tinka]

On Friday 13 May 2005 12:33, Gangasagar Amula wrote:
> Dear All,
>
> What is fair-queue.....

Weighted Fair Queuing (WFQ) is a type of WAN queuing 
strategy. Other types exist, e.g., FIFO (First In First 
Out), Priority Queuing and Custom Queuing; all depend on 
the desired application/goal.

>
> How it benefits the network performance....

(Please excuse the pedantry) WFQ'ing allows interactive 
traffic such as Telnet to have network priority over 
other more *hungry* protocols such as FTP.

When using this queuing strategy, traffic is sorted 
through the use of high and low volume conversations. 
Traffic within a session/conversation is kept within 
that session, records of which are handled on a FIFO 
basis within a particular session.

Typically, low volume traffic is given the first 
priority.

The required bandwidth that is configured is given to 
interactive traffic. High volume sessions will, then, 
equally share whatever bandwidth is left over.

By default, WFQ is enabled on all interfaces that will 
carry less than 2Mbps (you will notice a fresh boot of 
IOS will have it configured under your average WAN 
interface). It is assumed interfaces that can carry 
larger bandwidth capacities do not require WFQ.

>
> Because....in current secenario....our data links are
> highly utilised...

You need to identify first what prioritization patterns 
you are trying to achieve? Perhaps another queuing 
strategy might be more appropriate - it requires careful 
design and deployment, as each situation is unique.

Mark.

>
> Pls suggest...any soln....any Qos commands....
>
>
> Regards,
> Sagar.
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