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VLAN Management
Voice and Media
STEP 5
Cisco Small Business SG200 Series 8-port Smart Switches Administration Guide
Click Apply and then click Close. Your changes are saved to the Running
Configuration.
Media VLAN
The Media VLAN feature enables switch ports to carry voice, video, and signaling
traffic with an assigned priority value. Assigning different priorities to traffic
enables separation of media and data traffic coming into a port. The Media VLAN
feature helps to ensure that the sound or video quality of an IP phone or video
device is safeguarded from deterioration when data traffic on the port is high.
The inherent traffic isolation provided by VLANs ensures that inter-VLAN traffic is
under management control and that network-attached clients cannot initiate a
direct attack on voice components. The switch uses the IP-DSCP or 802. 1 p value
in packets from media devices to assign this traffic to high priority queues.
The switch uses Media VLANs to support LLDP-MED applications. (See
MED
for information on the protocol.) Each Media VLAN corresponds to an LLDP-
MED application for a specific type of media traffic. The LLDP-MED applications
are voice, voice signaling, guest voice, guest voice signaling, softphone voice,
video conferencing, streaming video, and video signaling. Each Media VLAN is
associated with the following parameters
•
A VLAN with optional VLAN tagging
•
An IEEE 802. 1 p priority value
•
A DSCP value
When a port is LLDP-MED enabled with network policy, the switch will advertise
its Media VLANs in the LLDP-MED network policy TLVs out to the port. When a
LLDP Media Endpoint is discovered, the switch will install the Media VLAN at the
corresponding port. You can enable LLDP-MED and networking policy in the
Administration > Discovery - LLDP pages.
Media VLAN is enabled and disabled globally. Each application and its Media
VLAN is configured on a per-port basis. For example, Guest Voice can be on
Media VLAN 1 on interface g1, but can be on Media VLAN 10 on interface g2.
The Media VLAN Interface Settings Table displays each media traffic type that can
be enabled, and shows its status and settings on the selected port.
6
LLDP-
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