From: Snow, Tim (timothy.snow@eds.com)
Date: Mon Aug 11 2003 - 03:57:29 GMT-3
It means at exactly the maximum threshold. Not over or not under. I
understand it's highly unlikely that the queue will ever be at exactly the
the max threshold but that's how they've wrote it.
From the link
When the average queue depth is above the minimum threshold, RED starts
dropping packets. The rate of packet drop increases linearly as the average
queue size increases until the average queue size reaches the maximum
threshold.
The mark probability denominator is the fraction of packets dropped when the
average queue depth is at the maximum threshold. For example, if the
denominator is 512, one out of every 512 packets is dropped when the average
queue is at the maximum threshold.
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fqos
_c/fqcprt3/qcfconav.htm#1000915
Tim
#12042
-----Original Message-----
From: Peng Zheng [mailto:zpnist@yahoo.com]
Sent: Monday, August 11, 2003 2:45 AM
To: ccielab@groupstudy.com
Subject: Which one is correct for WRED?
In
http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/12cgcr/qos_r
/qrcmdr.htm#1017566
It's said:
mark-prob-denominator
Denominator for the fraction of packets dropped when
the average queue depth is at the maximum threshold.
For example, if the denominator is 512, one out of
every 512 packets is dropped when the average queue is
at the maximum threshold. The value range is 1 to
65536. The default is 10; one out of every ten packets
is dropped at the maximum threshold.
What's "at the maximum threshold" mean? Does it mean
over maximum threshold or between minimum threshold
and maximum threshold?
__________________________________
Do you Yahoo!?
Yahoo! SiteBuilder - Free, easy-to-use web site design software
http://sitebuilder.yahoo.com
This archive was generated by hypermail 2.1.4 : Tue Sep 02 2003 - 18:53:57 GMT-3