HP StorageWorks Enterprise File Services WAN Accelerator - Manual (Page 71)

HP S TORAGE W ORKS EFS WAN A CCELERATOR M ANAGEMENT C ONSOLE U SER G UIDE 71
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Setting Quality
of Service Rules
Optionally, you can set Quality of Service (QoS) rules in the Setup: Advanced
Networking - QoS Rules page. You can map a service port to a Quality of Service
(QoS) Differentiated Services Code Point (DSCP) level based on the source IP subnet,
the destination IP subnet, destination port, and rule number. Specifying the destination
IP address enables you to apply different DSCP levels to different servers.
You specify an ordered list of rules where each rule is the DSCP level used on the inner
connection for connections matching the source IP subnet, the destination IP subnet
and, optionally, the destination port fields.
After you map a destination port and a DSCP level, every packet corresponding to the
connection with that destination port has the DSCP field set to that value in the forward
and backward direction. On the WAN side of the HP EFS WAN Accelerator, you
configure a network router or a traffic shaper to prioritize packets according to the
value in the DSCP field before they are sent across the WAN.
You can configure QoS rules that apply to a single port or you can configure QoS rules
that apply to a port label. A port label is a label that you assign to a set of ports so that
you can reduce the number of configuration rules in your system. For detailed
information about how to configure port labels, see
“Creating Port Labels” on page 93 .
IMPORTANT: If your connections already have a DSCP level and you do not define one in the
Management Console, the HP EFS WAN Accelerator uses the existing DSCP level for the
connection between the HP EFS WAN Accelerators. If you define a DSCP level in the
Management Console, the HP EFS WAN Accelerator overrides the existing DSCP level and the
value that you defined is applied.
TIP: To configure QoS mapping for an FTP data channel, specify port 20 and the corresponding
DSCP level. To configure QoS mapping for a MAPI data channel, specify port 7830 and the
corresponding DSCP level. Setting QoS for port 20 on the client-side HP EFS WAN Accelerator
affects passive FTP, while setting the QoS for port 20 on the server-side HP EFS WAN
Accelerator affects port active FTP.
To set a QoS level 1. Click the Setup tab to display the Setup: Optimization Service - General Settings
page.
2. Click Advanced Networking in the left menu to display the Setup: Advanced
Networking - Connection Pooling page.