From: Arun Arumuganainar (aarumuga@hotmail.com)
Date: Mon Sep 05 2005 - 00:21:58 GMT-3
One way to guarantee latency is to use priority queuing along with LFI !!!
Only with this way Voice packets can be given guaranteed Latency over slow
speed link ...
Note : Serialization delay at the hardware queue is very much significant on
slow speed link such as < T1speed serial line !!! We need to rely on LFI to
over come this scenario .
In LFI configuration you can specify maximum delay for voice packet size .
IOS will choose the fragment size based on the delay .
By the way this works on ppp - multilink interfaces. However you use Frame
Relay right ... Can you pls. confirm .
Could you pls. let me know complete question statement . With some topology
background ( i.e how routers are connected over the link latency need to be
ensured ) .
Thanks and Regards
Arun
----- Original Message -----
From: <gladston@br.ibm.com>
To: <ccielab@groupstudy.com>
Sent: Monday, September 05, 2005 3:57 AM
Subject: Re: Re: How to guarantee the latency
> John,
>
> Could you tell us what version do you used?
>
> ==============
> quoted
>
> policy-map shape
> class shape
> shape average 56
> shape holdq 640
> ==============
>
> I could not find 'shape holdq':
>
> Rack2R2(config-pmap-c)#shape ?
> adaptive Enable Traffic Shaping adaptation to BECN
> average configure token bucket: CIR (bps) [Bc (bits) [Be
(bits)]],
> send out Bc only per interval
> fecn-adapt Enable Traffic Shaping reflection of FECN as BECN
> fr-voice-adapt Enable rate adjustment depending on voice presence
> max-buffers Set Maximum Buffer Limit
> peak configure token bucket: CIR (bps) [Bc (bits) [Be
(bits)]],
> send out Bc+Be per interval
>
>
> Version tested is:
>
> C3640-JS-M, Version 12.2(15)T14
>
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