From: Mike Kraus \(mikraus\) (mikraus@cisco.com)
Date: Wed Jul 04 2007 - 13:14:11 ART
The burst size is just the size of the token bucket. Since a priority
queue is a policer not a shaper, I don't think there really is the
concept of Tc. You either have enough tokens or you don't for that
packet to be transmitted at that moment in time. So, to allow for
larger packets to be transmitted (burst), you would need to increase the
bucket size to accommodate them. So, the requirement should really be
phrased in terms of a rate of 128Kbps allowing for packets of up to 64Kb
in size.
See:
http://www.cisco.com/warp/public/105/priorityqueuedrops.html#step3ensure
sufficientburstsize
-----Original Message-----
From: BitGossip [mailto:bit.gossip@chello.nl]
Sent: Wednesday, July 04, 2007 10:45 AM
To: Mike Kraus (mikraus); ccielab@groupstudy.com
Subject: RE: MQC burst size
Mike,
The requirement asks for burst of 64kbps while the command expects a
figure in byte To first number is dimensionally bit per second while the
second is byte or bit.
So to go from the first to the second we have to multiply by a time
interval
Burst size (byte) = burst (in bps) * time_interval / 8 (byte per bit)
So what is this time_interval ?
This is very similar to BC=CIR * Tc
Or I am completely wrong.....
Thanks,
Bit.
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Mike Kraus (mikraus)
Sent: 04 July 2007 14:54
To: Bit Gossip; ccielab@groupstudy.com
Subject: RE: MQC burst size
Wouldn't it just be: priority 128 8000 (burst is in bytes)
Perhaps I'm misunderstanding something?
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Bit Gossip
Sent: Wednesday, July 04, 2007 3:15 AM
To: ccielab@groupstudy.com
Subject: MQC burst size
Does anyone knows how to calculate the burst size for the MQC priority
command?
priority {bandwidth-kbps | percent percentage} [burst]
For instance if the maximum rate is 128kbps and I want to allow burst of
64kbps
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