From: Mike Kraus \(mikraus\) (mikraus@cisco.com)
Date: Wed Jul 04 2007 - 14:25:01 ART
Antonio,
You are correct, but I'm going to attempt to clarify a bit, as I feel
that statement might confuse the issue to some. The documentation is
stating that the default burst size (Bc) is calculated off of a 200ms
interval of the configured mean rate (CIR), not that there is an
interval of 200ms that is somehow actually used or calculated by the
device.
The concept behind LLQ was to ensure voice was passed as quickly as
possible, so the priority queue is a policer. So, there is no
buffering, hence no Tc. They had to use some formula to calculate Bc
off of the rate, or they could have just assumed a default value (like
1500 bytes in policing in MQC).
Thanks,
Mike
-----Original Message-----
From: Antonio Soares [mailto:amsoares@netcabo.pt]
Sent: Wednesday, July 04, 2007 11:29 AM
To: 'BitGossip'; Mike Kraus (mikraus); ccielab@groupstudy.com
Subject: RE: MQC burst size
The feature document states that the interval is 200 ms:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121newft
/121
t/121t3/dtcfgbst.htm
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
BitGossip
Sent: quarta-feira, 4 de Julho de 2007 16:45
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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