Specifications

LLDP and LLDP-MED Configuration Examples
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An example of such a connection could be a softphone on a PC. The PC will run multiple
applications, but will not be able to provide VLAN tagging or Priority information. Currently,
voice applications will have a user, or predetermined DSCP value.
In the case of a Softphone being used on a PC, then DSCP information is provided by the voice
application, but Priority information and VLAN assignment must be configured at the access
port on the switch.
VLAN assignment for Data will be on the untagged Data VLAN. By default, this is VLAN 1.
Untagged data packets will use the port priority, which defaults to 0. For voice, the DSCP value
can be used to identify a higher Priority value, as defined in the DSCP to Priority map. In this
example, the voice packets should have Priority 6 assigned, which will be achieved by using
the incoming DSCP information in the packet.
The DSCP to Priority map is defined in the ProCurve switch by default. The command qos
type-of-service diff-services enables the switch-wide mapping of incoming DSCP data to
Priority mapping. Be aware that this affects all ports on the switch.
Applying PER VLAN Priority and DSCP QOS (optional)
A VLAN can be assigned a Priority value or a DSCP with associated Priority values, on a per
VLAN basis. Note that all packets on this VLAN will have their QoS parameters adjusted as
defined by the VLAN settings.
A VLAN can be assigned a per VLAN Priority value that will be applied on a VLAN basis and
will force all packets on a VLAN to have a common Priority value. This may not be desirable
for some applications, as some voice packets may need to have different priority levels. If this
VLAN is identified as voice and is enabled at an Access Port, then LLDP-MED will advertise
this Priority value rather than the default. The default DSCP value will continue to be used.
A VLAN can be assigned a per VLAN DSCP value that will be applied on a VLAN basis and
will force all packets on a VLAN to common DSCP and Priority values. The priority values are
based on the DSCP to Priority map settings. This may not always be desirable for some
applications, as some voice packets may need to have different priority levels. If this VLAN is
identified as voice and is enabled at an Access Port, the LLDP-MED will advertise the defined
DSCP value with associated Priority value, rather than the default values.
Connecting non-VLAN enabled voice devices to the network
Typically these would be voice servers, applications and gateways. These devices may not
support VLAN tagging capability, but may provide DSCP, depending on the application. In this
case, the VLAN would be assigned as untagged to the Ethernet switch port and the DSCP to
Priority map could be used to assign the appropriate Priority level to the incoming data.
Alternatively, the port priority can be applied on a per port basis. This would be configured
through the command interface <port-list> qos priority <0-7>.
HP ProCurve Switch 5304XL(config)# vlan 63 qos priority 6
HP ProCurve Switch 5304XL(config)# vlan 63 qos dscp 101110