Brocade Communications Systems Network Advisor 12.0.0, Руководство пользователя

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420 Brocade Network Advisor SAN User Manual
53-1002696-01
Bulk port configuration
15
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Target Rate Limiting—Enable the Target Rate Limiting feature to minimize congestion at
the adapter port. Limiting the data rate to slower targets ensures that there is no
buffer-to-buffer credit back-pressure between the switch due to a slow-draining target.
NOTE
NOTE: Target Rate Limiting and QoS cannot be enabled at the same time.
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Path TOV—Enter a path timeout value (TOV) to either force an immediate failover (by setting
the TOV to 0) or to specify a delay in seconds (1 through 60 seconds). The default value is
30 seconds.
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Boot over SAN—The Boot over SAN feature allows you to target remote boot devices (LUNs
on SAN storage arrays) from which to boot the host system. Configure the following boot
parameters:
Boot Speed—Set the port speed. Possible values are Auto Negotiate (to auto-negotiate the
speed) and 1, 2, 4, 8, and 16 Gbps and unknown speeds.
Boot Option—From the list, select one of the following:
•
Auto Discovered From Fabric—Enables Boot over SAN using boot LUN information
stored in the fabric. This is the default setting.
•
First Visible LUN—Enables Boot over SAN from the first discovered LUN in the SAN.
Bootup Delay—Enter a bootup delay value. Valid values are 0, 1, 2, 5, and 10 minutes and
the default value is 0 minutes. The Bootup Delay feature allows you to configure the delay
to device discovery, offsetting the disk spinup delay time when servers and storage
devices are powered on simultaneously.
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Port Topology—Specify the topology type. The supported topology mode is point-to-point
(p2p) or loop. You can set the toplogy to loop only if QoS and Target Rate Limiting are
disabled.
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QoS—Enable the Quality of Service (QoS) feature to assign traffic priority (high, medium, or
low) for a given source and destination traffic flow. By default, all flows are marked as
medium.
NOTE
NOTE: QoS and Target Rate Limiting cannot be enabled at the same time.
QoS Percentage—The QoS priority flow value extends QoS support by allowing the user to
configure custom bandwidth values for High, Medium, and Low QoS priorities. The QoS %
value represents the bandwidth in percentage for each of the priorities (high, medium, and
low) and the three values must equal 100 percent.
The default priority flow settings of the switch are 60 (high), 30 (medium), and 10 (low). If
QoS is disabled and enabled again without providing the high, medium, and low bandwidth
values, the default values are applied.
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vNIC Configuration—Enables you to configure a single physical CNA Ethernet port into
multiple virtual Network Interface Cards (vNICs).
•
Enter the maximum allowable output bandwidth in increments of 100 Mbps in the
vNIC Max Bandwidth (Mbps) box. The maximum bandwidth is 10 Gbps and this is the
default.