Cisco 521SG - Unified IP Phone VoIP Administration Manual page 146

Configuring Security, Quality, and Network Features
Configuring VLAN Settings
Cisco Small Business SPA300 Series, SPA500 Series, and WIP310 IP Phone Administration Guide
Network Policy TLV
Outgoing LLDPDU—The phone will send out only one Network Policy TLV with the
Application Type Value set to 1 (Voice). Before the VLAN or DSCP is determined,
the Unknown Policy Flag (U) is set to 1. If the VLAN setting or DSCP is known, the
value is set to 0. When the policy is unknown, all other values are set to 0. Before
the VLAN is determined or used, the Tagged Flag (T) is set to 0. If the tagged VLAN
(VLAN ID > 1) is used for the phone, the Tagged Flag (T) is set to 1. Reserved (X) is
always set to 0. If the VLAN is used, the corresponding VLAN ID and L2 Priority will
be set accordingly. VLAN ID valid value is range from 1-4094. However, VLAN ID=1
will never be used (limitation). If DSCP is used, the value range from 0-63 is set
accordingly.
Incoming LLDPDU—Multiple Network Policy TLVs for different application types
are allowed. The phone will only support and interpret the TLV with the application
type=1 (Voice). TLVs for other application types are ignored and not validated.
LLDP-MED Extended Power-Via-MDI TLV
In the TLV for the outgoing LLDPDU, the binary value for Power Type is set to "0 1"
to indicate the power type for phone is PD Device. The Power source for the
phone is set "PSE and local" with binary value "1 1". The Power Priority is set to
binary "0 0 0 0" to indicate unknown priority while the Power Value is set to
maximum power value based on phone type:
Phone Type
Cisco SPA525G or Cisco SPA525G2
Cisco SPA500 Series
Cisco SPA300 Series
For the incoming LLDPDU, the TLV is ignored and not validated. Only one TLV is
allowed in the outgoing and incoming LLDPDUs. The phone will send out the TLV
for wired network only.
The LLDP-MED standard was originally drafted in the context of Ethernet.
Discussion is ongoing for LLDP-MED for Wireless Networks. Refer to ANSI-TIA
1057, Annex C, C.3 Applicable TLV for VoWLAN, table 24. It is recommended that
the TLV is not applicable in the context of the wireless network. This TLV is
targeted for use in the context of PoE and Ethernet. The TLV, if added, will not
provide any value for network management or power policy adjustment at the
switch.
Power Value
125
120
100
5
145