Context
An OUI is a globally-unique identifier assigned by the Institute of Electrical and Electronics
Engineers (IEEE) to a specific equipment vendor. An OUI represents the first 24 bits of a binary
MAC address.
An OUI represents a MAC address segment that is obtained by performing the AND operation
between a 48-bit MAC address and a mask. For example, the MAC address is 1-1-1, and the
mask is FFFF-FF00-0000. The AND operation is performed between the MAC address and the
mask to obtain the OUI 0001-0000-0000. If the first 24 bits of the MAC address of a device are
the same as an OUI, a voice VLAN-enabled port considers the device as a voice device and data
from the device as voice data.
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
voice-vlan mac-address mac-address mask oui-mask [ description text ]
An OUI is configured.
l The mac-address value cannot be all 0s or a multicast or broadcast address.
l A device can be configured with a maximum of 16 OUIs. When the device is configured
with 16 OUIs, subsequent configurations will not take effect.
l When using the undo voice-vlan mac-address command to delete an OUI, specify the mac-
address value in this command as the result of the AND operation by using the configured
MAC address and mask.
NOTE
When the source MAC address of a packet matches the OUI, the S7700 changes the priority of the packet
basing on the configuration of 3.8.5 (Optional) Configuring an 802.1p Priority and a DSCP Value for
the Voice VLAN to improve the transmission quality.
----End
3.8.4 (Optional) Setting an Aging Timer for a Voice VLAN
In automatic mode, a voice VLAN-enabled port learns source MAC addresses of frames from
voice devices, adds ports connecting the device to voice devices to a voice VLAN, and uses the
voice VLAN aging timer to control the number of ports in the voice VLAN.
Context
The aging timer of a voice VLAN is effective only when ports are automatically added to the
voice VLAN.
If a voice VLAN-enabled port does not receive voice data from a voice device before the aging
timer expires, the port will be automatically deleted from the voice VLAN. If the port receives
voice data from the voice device again, the port will be automatically added to the voice VLAN.
Quidway S7700 Smart Routing Switch
Configuration Guide - Ethernet 3 VLAN Configuration
Issue 01 (2011-07-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
108
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