Configuration Guide User guide

FastIron Configuration Guide 455
53-1002494-02
General LLDP operating principles
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 81, indicates how the device is being referenced in the Chassis ID field.
Brocade 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): 0012.f233.e2c0
The chassis ID TLV is always the first TLV in the LLDPDU.
TABLE 81 Chassis ID subtypes
ID subtype Description
0Reserved
1 Chassis component
2Interface alias
3Port component
4MAC address
5Network address
6Interface name
7 Locally assigned
8 – 255 Reserved