Znyx Networks bh5700 - Manual (Page 207)

zcos
NAME
zcos - class of service queue control
SYNOPSIS
zcos [-h <hostname>] [-d <level>]
[ -u <default priority> ]
[ -m q0,q1,q2,q3,q4,q5,q6,q7 ]
[-n <queue length list in packets for each queue> |
-b <Reserved space in bytes for each queue> |
-s <limit on dynamic pool usage, in bytes>, <reset %>]
[ -k PRI | RR | WRR | DRR]
[ -w <queue weight list> ]
[ -g <max>,<burst> ]
[ -r <guaranteed bandwidth in Kbps for each queue> [ -t <burst
size list in Kbytes> ]
[ -l <maximum bandwidth in Kbps for each queue> [ -t <burst
size list in Kbytes> ]
[ -q all | qmap | qinfo | scheduler ]
[<port list>]
DESCRIPTION
zcos provides a means to set many of the hardware features of the switch related to class of
service and differentiated services processing, including scheduling and bandwidth management.
The current settings can also be examined.
The OpenArchitect switch supports up to eight class of service queues for packets to be sent out
each of the Ethernet ports or forwarded to the CPU. Normally, packets are placed in these queues
based on their 802.1p priority for tagged packets or the default priority for the port on which they
arrive. The queue destination for each priority is determined by a map. A separate map is used
for each ingress port. For additional means of setting the cos queue for a packet, see the sections
on filtering and traffic control.
Packets are selected from the cos queues at a port based on a scheduler, which may be configured
in a variety of modes. The scheduler can provide minimum bandwidth guarantees and limit the
bandwidth used for packets from each cos queue. The total egress bandwidth for a port can also
be limited.
Ethernet Switch Blade User's Guide release 3.2.2j page 207