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Lantronix
SM24TBT2DPA and SM24TBT2DPB Web User Guide
A large network may support multiple VoIP policies across the entire organization, and different policies
per application type. LLDP-MED allows multiple policies to be advertised per port, each corresponding to a
different application type. Different ports on the same Network Connectivity Device may advertise different
sets of policies, based on the authenticated user identity or port configuration.
It should be noted that LLDP-MED is not intended to run on links other than between Network Connectivity
Devices and Endpoints, and therefore does not need to advertise the multitude of network policies that
frequently run on an aggregated link interior to the LAN.
Delete:
Check to delete the policy. It will be deleted during the next save.
Policy ID:
ID for the policy. This is auto generated and is used when selecting the polices that will be
mapped to the specific ports.
Application Type:
Intended use of the application types:
1.
Voice
- for use by dedicated IP Telephony handsets and other similar appliances
supporting interactive voice services. These devices are typically deployed on a
separate VLAN for ease of deployment and enhanced security by isolation from
data applications.
2.
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.
3.
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.
4.
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.
5.
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.
6.
Video
Conferencing
- for use by dedicated Video Conferencing equipment and other similar
appliances supporting real-time interactive video/audio services.
7.
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.
8.
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
: I
ndicates 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: The
VLAN identifier (VID) for the port as defined in IEEE 802.1Q-2003.
L2 Priority:
The Layer 2 priority to be used for the specified application type. L2 Priority may specify one
of eight priority levels (0 through 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.
DSCP:
the
DSCP value to be used to provide Diffserv node behavior for the specified application type as
defined in IETF RFC 2474. DSCP may contain one of 64 code point values (0 through 63). A value of 0
represents use of the default DSCP value as defined in RFC 2475.