Black Box LPB2910A User Manual page 149

VLAN configuration, along with the associated Layer 2 and Layer 3 attributes, that apply for a set of
specific protocol applications on that port. Improper network policy configurations are a very
significant issue in VoIP environments that frequently result in voice quality degradation or loss of
service.
Policies are only intended for use with applications that have specific "real-­‐time" network policy
requirements, s uch a s i nteractive v oice a nd/or v ideo s ervices.
The n etwork p olicy a ttributes a dvertised a re:
1. L ayer 2 V LAN I D ( IEEE 8 02.1Q-­‐2003)
2. L ayer 2 p riority v alue ( IEEE 8 02.1D-­‐2004)
3. L ayer 3 D iffserv c ode p oint ( DSCP) v alue ( IETF R FC 2 474)
This network policy is potentially advertised and associated with multiple sets of application types
supported o n a g iven p ort. T he a pplication t ypes s pecifically a ddressed a re:
1. V oice
2. G uest V oice
3. S oftphone V oice
4. V ideo C onferencing
5. S treaming V ideo
6. C ontrol / S ignalling ( conditionally s upport a s eparate n etwork p olicy f or t he m edia t ypes a bove)
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.
NOTE: L LDP-­‐MED i s n ot i ntended t o r un o n l inks o ther t han b etween N etwork C onnectivity D evices
and E ndpoints, a nd d oes n ot n eed t o a dvertise t he m ultitude o f n etwork p olicies t hat f requently r un
on a n a ggregated l ink i nterior t o t he L AN.
Delete:

Check t o d elete t he p olicy. I t w ill b e d eleted d uring t he n ext s ave.
Policy I D:

ID for the policy. This is auto generated and will be used when selecting the polices that will be
mapped t o t he s pecific p orts.
Application T ype:

Intended u se o f t he a pplication t ypes:
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 a nd e nhanced s ecurity b y i solation f rom d ata a pplications.
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 s ame n etwork p olicies a pply a s t hose a dvertised i n t he V oice a pplication p olicy.
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. G uest V oice S ignaling ( conditional) -­‐ f or u se i n n etwork t opologies t hat r equire a d ifferent p olicy
for the guest voice signaling than for the guest voice media. This application type should not be
advertised i f a ll t he s ame n etwork p olicies a pply a s t hose a dvertised i n t he G uest V oice a pplication
policy.
5. Softphone Voice -­‐ for use by softphone applications on typical data centric devices, such as PCs
137
Publication date: Sept, 2015
Revision A1