Tlv Information - Cisco 8831 Administration Manual

Chapter 4 Configure Security, Quality, and Network Features
The phone sends out the shutdown LLDPDU if applicable. The LLDPDU frame contains the following
TLVs:
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There are some restrictions in the implementation of LLDP-MED on the Cisco IP Phones:
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TLV Information

These 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
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.
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.
Chassis ID TLV
Port ID TLV
Time to live TLV
End of LLDPDU TLV
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.
. The only INAN address family supported is IPv4. Currently, IPv6 address for the
0.0.0.0
Cisco Unified IP Conference Phone 8831 for Third-Party Call Control Administration Guide
Configure VLAN Settings
4-7