Viewing Lldp Neighbor Information - HP ProCurve Secure Router 7203 dl Advanced Management And Configuration Manual

By scanning LLDP information, you can determine which devices the router
can reach on the WAN—and whether any unauthorized devices have con-
tacted the local router. You can also discover useful information about neigh-
boring devices such as their capabilities and model numbers. You can also find
the address for the management agents on connecting devices so that you can
configure them remotely (if authorized to do so).

Viewing LLDP Neighbor Information

Each router interface listens for information from devices on the connection
(its neighbor or neighbors). To view information about the router's neighbors,
use this enable mode command:
Syntax: show lldp neighbors [interface <interface ID>] [detail]
A neighbor's LLDP information includes:
chassis ID—MAC address
system name—for example, a router's hostname
port ID or device port—the ID for the neighbor interface that transmitted
this message
TTL—how long, in seconds, this information should be stored
platform—the device model and, for the ProCurve Secure Router, the
Secure Router OS version
capabilities—all the functions the neighbor can fulfill, which include:
• router
• bridge
• host
• DOCSIS device (a type of cable modem)
• WLAN Access Point
• repeater
• telephone
enabled capabilities—the neighbor's current function; the display gives a
key for the capabilities (for example, R for router)
local port or interface—the interface through which the router connects
to the neighbor
management address—an IP address at which the management agent for
the neighbor can be reached
Use the detail option to see the complete LLDP information for all neighbors.
(See Figure 12-3.) For example, enter:
Link Layer Discovery Protocol
Viewing LLDP Information
12-5