Chapter 6
Configuring Driver Parameters
41
Transmit Queue Parameters
lists the default values and allowable values for the transmit queue
parameters.
TABLE 6-3
Transmit Queue Parameter Values and Descriptions
Parameter
Values
Description
ips_txqpri
0 to 13107
The value of priority level in the four transmit queues.
There are a total of four priority level for each queue (0 to
3). A value of 0x3210 indicates that queue 0 has priority 0.
Queue 1 has priority 1, queue 2 has priority 2, Queue 3
has priority 3. The hex value needs to be in the form of
decimal when entering into this variable.
(Default=12816 or 0x3210)
ips_txloadbal
0 to 1
A value of 1 enables Tx load balancing. A value of 0
disables Tx load balancing If Tx load balancing is turned
on, the Tx packet header is parsed to determine which
queue the packet is placed into. All control packet is
placed into Queue0. All TCP packets will be parsed and
load balanced according to the policy set into the
ips_txpolicy parameter. When Tx load balancing is
disabled, all packets default to queue 0.
ips_txpolicy
0 to 7
The value of this parameter will be logical ANDed with
the source TCP port number to determine the Tx queue to
be used for load balancing purpose. For example, if TCP
source port number is 10001 and the value is set to 3, then
the Tx queue used will be (10001 & 3) = Tx Queue #1. This
parameter is only meaningful when the ips_txloadbal
parameter is set to 1. Otherwise, the value in this
parameter is ignored.
ips_txqos
0 to 1
A value of 1 enables Tx QoS A value of 0 disables Tx QoS
When QoS is enabled, the Tx queue number is determined
by the b_band field of the message block (mblk) delivered
from IP. The current mapping is set as follows:
b_band valueQueue#
0 to 640
65 to 1921
193 to 2242
225 to 2553
ips_txqos overrides the ips_txloadbal and ips_txpolicy.
Therefore, when ips_txqos is enabled, the value of
ips_txloadbal and ips_txpolicy parameters are ignored.
Summary of Contents for APOLLO OC48
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