Quality of Service (QoS): Managing Bandwidth More Effectively
Using QoS Classifiers To Configure QoS for Outbound Traffic
QoS VLAN-ID (VID) Priority
QoS Classifier Precedence: 5
The QoS VLAN-ID option supports up to 120 VLAN IDs (VIDs) as QoS
classifiers, depending on rule use by other QoS options.
Where a particular VLAN-ID classifier has the highest precedence in the switch
for traffic in that VLAN, then traffic received in that VLAN is marked with the
VID classifier's configured priority level. Different VLAN-ID classifiers can
have differing priority levels.
Options for Assigning Priority. Priority control options for packets
carrying a specified VLAN-ID include:
(For operation when other QoS classifiers apply to the same traffic, refer to
"Classifiers for Prioritizing Outbound Packets" on page 6-9.)
N o t e
QoS with VID priority applies to static VLANs only, and applying QoS to
dynamic VLANs created by GVRP operation is not supported. A VLAN must
exist while a subject of a QoS configuration, and eliminating a VLAN from the
switch causes the switch to clear any QoS features configured for that VID.
Assigning a Priority Based on VLAN-ID
This option assigns a priority to all outbound packets having the specified
VLAN-ID (VID). You can configure this option by either specifying the VLAN
ID ahead of the qos command or moving to the VLAN context for the VLAN
you want to configure for priority.
DSCP policy (Assigning a new DSCP and an associated 802.1p priority;
inbound packets must be IPv4.)