Tlv Information - Cisco SPA303 Administration Manual

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
• Time to live TLV
• LLDP-MED Capabilities TLV
• LLDP-MED Network Policy TLV (for application type=Voice only)
• End of LLDPDU TLV
The phone sends out the shutdown LLDPDU if applicable. The LLDPDU frame
contains the following TLVs:
• Chassis ID TLV
• Port ID TLV
• Time to live TLV
• End of LLDPDU TLV
There are some restrictions in the implementation of LLDP-MED on the Cisco IP
Phones:
• Storage and retrieval of neighbor information is not supported.
• SNMP and corresponding MIBs are not supported.
• Recording and retrieval of statistical counters are not supported.
• There is no full validation of all TLVs; TLVs that do not apply to the phones
are ignored.
• Protocol state machines as stated in the standards are only used for
reference.

TLV Information

The following sections provide the TLV information.
Chassis ID TLV
For the outgoing LLDPDU, the TLV supports sub-type=5 (Network Address). When
IP address is known, the value of Chassis ID is an octet of the INAN address family
number followed by the octet string for the IPv4 address used for voice
communication. If the IP address is unknown, the value for Chassis ID is "0.0.0.0."
The only INAN address family supported is IPv4. Currently, IPv6 address for the
Chassis ID is not supported. For the incoming LLDPDU, the Chassis ID is treated as
an opaque value to form MSAP identifier. The value is not validated against its sub-
type. The Chassis ID TLV is mandatory as the first TLV. Only one Chassis ID TLV is
allowed for the outgoing and incoming LLDPDUs.
5
147