Cisco SPA303 Administration Manual page 150

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Configuring Security, Quality, and Network Features
Configuring VLAN Settings for IP Phones
Cisco Small Business SPA300 Series, SPA500 Series, and WIP310 IP Phone Administration Guide
Port ID TLV
For the outgoing LLDPDU, the TLV supports sub-type=3 (MAC address). The 6
octet MAC address for the Ethernet port is used for the value of Port ID in wired or
wireless mode. For the incoming LLDPDU, the Port ID TLV is treated as an opaque
value to form the MSAP identifier. The value is not validated against its sub-type.
The Port ID TLV is mandatory as the second TLV. Only one Port ID TLV is allowed
for the outgoing and incoming LLDPDUs.
Time to Live TLV
For the outgoing LLDPDU, the Time to live TTL value is 180 seconds. This is
different from 120 seconds as recommended by the standard. For the shutdown
LLDPDU, the TTL value is always 0. The Time to Live TLV is mandatory as the third
TLV. Only one Time to Live TLV is allowed for the outgoing and incoming LLDPDUs.
End of LLDPDU TLV
The value is 2-octet, all zero. This TLV is mandatory and only one is allowed for the
outgoing and incoming LLDPDUs.
Port Description TLV
For the outgoing LLDPDU, in the Port Description TLV, the value for the port
description is the same as "Port ID TLV" for CDP. The incoming LLDPDU, the Port
Description TLV, is ignored and not validated. Only one Port Description TLV is
allowed for outgoing and incoming LLDPDUs.
System Name TLV
For the outgoing LLDPDU, in the System Name TLV, the value is the same as
'Platform TLV" for CDP. For the Cisco SPA525G2, the name is "SPA525G2." The
incoming LLDPDU, the System Name TLV, is ignored and not validated. Only one
System Name TLV is allowed for the outgoing and incoming LLDPDUs.
System Capabilities TLV
For the outgoing LLDPDU, in the System Capabilities TLV, the bit values for the 2
octet system capabilities field should be set for Bit 2 (Bridge) and Bit 5 (Phone) for
a phone with a PC port. If the phone does not have a PC port, only Bit 5 should be
set. The same system capability value should be set for the enabled capability
field. For the incoming LLDPDU, the System Capabilities TLV is ignored. The TLV is
not validated semantically against the MED device type. The System Capabilities
TLV is mandatory for outgoing LLDPDUs. Only one System Capabilities TLV is
allowed.
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