128
Table 17 How a voice VLAN-enabled port processes packets in security and normal mode
Voice VLAN
mode
Packet type
Packet processing mode
Security
Untagged packets or
packets that carry the
voice VLAN tags
•
If the source MAC address of a packet matches an OUI
address on the device, the packet is forwarded in the
voice VLAN.
•
If the source MAC address of a packet does not match
an OUI address on the device, the packet is dropped.
Packets that carry other
tags
Forwarded or dropped depending on whether the port allows
packets of these VLANs to pass through.
Normal
Untagged packets or
packets that carry the
voice VLAN tags
The port does not determine the source MAC addresses of
inbound packets. Both voice traffic and non-voice traffic can
be transmitted in the voice VLAN.
Packets that carry other
tags
Forwarded or dropped depending on whether the port allows
packets of these VLANs to pass through.
Configuration prerequisites
Before you configure a voice VLAN, complete the following tasks:
•
Create a VLAN.
•
Determine the QoS priority settings for voice VLAN traffic.
•
Determine the voice VLAN assignment mode.
Configuring QoS priority settings for voice traffic
on an interface
The QoS priority settings include the CoS and DSCP values. Voice traffic carries its own QoS priority
settings. You can configure the device either to modify to modify the QoS priority settings for
incoming voice traffic.
Before you configure the QoS priority settings for voice traffic on a port, make sure the voice VLAN
feature is disabled on it.
To configure QoS priority settings for voice traffic:
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter Layer 2
Ethernet interface
view.
interface
interface-type
interface-number
N/A