Priority Commands (Layer 2)
31-7
31
Default Setting
The original priority value in the VLAN tag of a tagged packet, or a VLAN
priority tag inserted by another device for an untagged packet.
Command Mode
Interface Configuration (Ethernet, Port Channel)
Command Usage
• This command can be used to set a high priority for a VLAN carrying mostly
low-latency traffic such as Voice over IP (VoIP), or to set a low priority for a
VLAN carrying normal data traffic not sensitive to latency.
• The priority can only be fixed for up to four VLANs on this switch.
• Each CoS priority maps to one transmit queue as shown in Table 31-3, “Default
CoS Priority Levels,” on page 31-5.
Example
This example sets the priority for all traffic entering VLAN 1 on port 1 to CoS 7.
show vlan based priority
This command displays the modified CoS priority for frames entering a VLAN.
Command Mode
Privileged Exec
Command Usage
This command only displays interfaces for which the egress frame priority has
been fixed on a selected VLAN.
Example
Console(config)#interface ethernet 1/1
Console(config-if)#vlan 1 priority 7
Console(config-if)#
Console#show vlan based priority
Eth 1/1: Vlan 1 Priority 7
Console#
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