LevelOne GSW-4876 - Manual (Page 165)

C HAPTER 4 | Configuring the Switch
Link Layer Discovery Protocol
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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.
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Video Conferencing
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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.
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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.
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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.
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VLAN ID – VLAN identifier for the port. (Range: 1-4095)
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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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DSCP – DSCP value 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 - 63). A value of 0 represents
use of the default DSCP value as defined in RFC 2475.
◆ Policy Port Configuration – Every port may advertise a unique set of
network policies or different attributes for the same network policies,
based on the authenticated user identity or port configuration.
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Port – The port number for which the configuration applies.
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Policy ID – The set of policies that apply to a given port. The set of
policies is selected by marking the check boxes that correspond to
the required policies.