Enabling Qos - Alcatel OS-LS-6224 User Manual

services can be set:
• Minimum Delay — The queue is assigned to a strict priority policy, and traffic is
assigned to the highest priority queue.
• Best Effort — Traffic is assigned to the lowest priority queue
• Bandwidth Assignments — Bandwidths are assigned by configuring the WRR
scheduling scheme.
Advanced QoS Mode
Advanced QoS mode provides rules for specifying flow classification and assigning
rule actions that relate to bandwidth management.
In advanced QoS mode, ACLs can be applied directly to an interface. However, a
policy and ACL cannot be simultaneously applied to an interface. Deny is the default
action for packets not matched to a policy classification. Deny All is the default
action for packets not matching any of the classifications within the policy.
After assigning packets to a specific queue, services such as configuring output
queues for the scheduling scheme, or CIR, per interface can be applied. Note that
packets may egress with a different VPT tag than that with which they ingressed.
Packets are always assigned a VPT tag of 0 or 1 at the egress. When using trust
VPT this caveat does not exist, and packets egress with the same VPT with which
they ingressed. When configuring the system to work in Advanced Quality of Service
Mode, the system remains in "Trust DSCP" mode.

Enabling QoS

The CoS Mode Page contains fields for enabling or disabling QoS.
Command Attributes
• CoS/QoS Mode — Indicates if QoS is enabled on the device. The possible values
are:
• Basic — Enables QoS on the interface.
• Disable — Disables QoS on the interface.
• Advanced — Enables QoS Advanced mode on the interface.
• Copy from Entry Number — Copies the port QoS information from the selected
port.
• To Entry Number — Indicates the port to which the port QoS information is copied.
• Unit No./LAG — Select whether the displayed information refers to one of the
stacked member devices (Unit No.) or to a LAG.
• Interface — Displays the interface for which the global QoS parameters are
defined.
• Port — Selects the port for which the global QoS parameters are defined.
• LAG — Selects the LAG for which the global QoS parameters are defined.
• Default CoS — Determines the default CoS value for incoming packets for which
a VLAN tag is not defined. The possible field values are 0-7. The default CoS is 0.
• Restore Defaults — Restores the factory QoS default settings to the selected port.
Configuring Quality of Service
3
235