Dell PowerEdge VRTX - Manual (Page 435)

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FILE LOCATION: C:\Users\gina\Desktop\Checkout_new\Dell Plasma\User
Guide\Plasma_UGQoS.fm
D E L L CO N F I D E N T I A L – P R E L I MI N A RY 4/ 1 8 /1 3 - F O R PR O O F O N LY
Workflow to Configure Basic Mode
To configure Basic QoS mode, perform the following:
1 Select Basic mode for the system in the QoS Mode page .
2 Select the trust-behavior in the Global Settings page.
3 If there is any port that, as an exception, should not trust the incoming
CoS mark, disable the QoS state on that port in the Interface Settings
pages .
If a port is disabled without trusted mode, all its ingress packets are
forwarded in best effort. It is recommended that you disable the trusted
mode at the ports where the CoS and/or DSCP values in the incoming
packets are not trustworthy. Otherwise, performance in the network might
be negatively affected.
4 If you selected DSCP Rewrite in the Global Settings page, set the DSCP
in/out values in the DSCP Rewrite page.
Global Settings
Use the Global Settings page to enable Trust on all interfaces on the switch.
This configuration is only active when the QoS mode is Basic. Packets
entering a QoS domain are classified at the edge of the QoS domain.
For more information on setting Trust mode on an interface, see "Interface
Settings" on page 437.
To define Trust configuration:
1 Click Quality of Service > QoS Basic Mode > Global Settings in the tree
view to display the Global Settings page.
2 Enter the fields:
– Trust Mode — Enable/disable Trust mode.
•
CoS — Traffic is mapped to queues, based on the VPT field in the
VLAN tag, or based on the per-port default CoS value (if there is
no VLAN tag on the incoming packet). The mapping of the VPT
to queue can be configured in the CoS to Queue page.
• DSCP — All IP traffic is mapped to queues, based on the DSCP
field in the IP header. The mapping of the DSCP to queue is
configured in the DSCP to Queue page.