Brocade Communications Systems Brocade ICX 6650 - Manual (Page 207)

Brocade ICX 6650 Administration Guide 189
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General LLDP operating principles
8
LLDP-MED TLVs
Brocade devices honor and send the following LLDP-MED TLVs, as defined in the TIA-1057
standard:
• LLDP-MED capabilities
• Network policy
• Location identification
• Extended power-via-MDI
Mandatory TLVs
When an LLDP agent transmits LLDP packets to other agents in the same 802 LAN segments, the
following mandatory TLVs are always included:
• Chassis ID
• Port ID
• Time to Live (TTL)
This section describes the above TLVs in detail.
Chassis ID
The Chassis ID identifies the device that sent the LLDP packets.
There are several ways in which a device may be identified. A chassis ID subtype, included in the
TLV and shown in
Table 42 , indicates how the device is being referenced in the Chassis ID field.
Brocade ICX 6650 devices use chassis ID subtype 4, the base MAC address of the device. Other
third party devices may use a chassis ID subtype other than 4. The chassis ID will appear similar to
the following on the remote device, and in the CLI display output on the Brocade device (show lldp
local-info).
Chassis ID (MAC address): 748e.f80c.5f40
The chassis ID TLV is always the first TLV in the LLDPDU.
Port ID
The Port ID identifies the port from which LLDP packets were sent.
TABLE 42 Chassis ID subtypes
ID subtype Description
0 Reserved
1 Chassis component
2 Interface alias
3 Port component
4 MAC address
5 Network address
6 Interface name
7 Locally assigned
8 – 255 Reserved