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VLAN for ease of deployment and enhanced security by isolation from data applications.
■ Voice Signaling (conditional) – For use in network topologies that require a different
policy for the voice signaling than for the voice media. This application type should not be
advertised if all the same network policies apply as those advertised in the Voice
application policy.
■ Guest Voice – Support a separate 'limited feature-set' voice service for guest users and
visitors with their own IP Telephony handsets and other similar appliances supporting
interactive voice services.
■ Guest Voice Signaling (conditional) – For use in network topologies that require a
different policy for the guest voice signaling than for the guest voice media. This
application type should not be advertised if all the same network policies apply as those
advertised in the Guest Voice application policy.
■ Softphone Voice – For use by softphone applications on typical data centric devices,
such as PCs or laptops. This class of endpoints frequently does not support multiple
VLANs, if at all, and are typically configured to use an 'untagged’ VLAN or a single 'tagged’
data specific VLAN. When a network policy is defined for use with an 'untagged’ VLAN
(see Tagged flag below), then the L2 priority field is ignored and only the DSCP value has
relevance.
■ Video Conferencing
■ Streaming Video – For use by broadcast or multicast based video content distribution
and other similar applications supporting streaming video services that require specific
network policy treatment. Video applications relying on TCP with buffering would not be an
intended use of this application type.
■ Video Signaling (conditional) – For use in network topologies that require a separate
policy for the video signaling than for the video media. This application type should not be
advertised if all the same network policies apply as those advertised in the Video
Conferencing application policy.
■ Tag – Tag indicating whether the specified application type is using a “tagged” or an
“untagged” VLAN.
Untagged indicates that the device is using an untagged frame format and as such does
not include a tag header as defined by IEEE 802.1Q-2003. In this case, both the VLAN ID
and the Layer 2 priority fields are ignored and only the DSCP value has relevance.
Tagged indicates that the device is using the IEEE 802.1Q tagged frame format, and that
both the VLAN ID and the Layer 2 priority values are being used, as well as the DSCP
value. The tagged format includes an additional field, known as the tag header. The tagged
frame format also includes priority tagged frames as defined by IEEE 802.1Q-2003.
■ VLAN ID – VLAN identifier for the port. (Range: 1-4095)
■ L2 Priority – Layer 2 priority used for the specified application type. L2 Priority may
specify one of eight priority levels (0 - 7), as defined by IEEE 802.1D-2004. A value of 0
represents use of the default priority as defined in IEEE 802.1D-2004.
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