LLDP and LLDP-MED
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LLDP terms used in this chapter................................................................................... 173
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LLDP overview.............................................................................................................. 174
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LLDP-MED overview.....................................................................................................175
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General LLDP operating principles............................................................................... 177
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MIB support...................................................................................................................182
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Syslog messages.......................................................................................................... 182
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LLDP configuration........................................................................................................182
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LLDP-MED configuration.............................................................................................. 196
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LLDP-MED attributes advertised by the Brocade device.............................................. 206
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Resetting LLDP statistics.............................................................................................. 215
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Clearing cached LLDP neighbor information................................................................ 215
LLDP terms used in this chapter
Endpoint device
- An LLDP-MED device located at the network edge, that provides some aspect of IP
communications service based on IEEE 802 LAN technology. An Endpoint device is classified in one of
three class types (I, II, or III) and can be an IP telephone, softphone, VoIP gateway, or conference
bridge, among others.
Link Layer discovery protocol (LLDP)
- The Layer 2 network discovery protocol described in the
IEEE 802.1AB standard,
Station and Media Access Control Connectivity Discovery
. This protocol
enables a station to advertise its capabilities to, and to discover, other LLDP-enabled stations in the
same 802 LAN segments.
LLDP agent
- The protocol entity that implements LLDP for a particular IEEE 802 device. Depending on
the configured LLDP operating mode, an LLDP agent can send and receive LLDP advertisements
(frames), or send LLDP advertisements only, or receive LLDP advertisements only.
LLDP media endpoint devices (LLDP-MED)
- The Layer 2 network discovery protocol extension
described in the ANSI/TIA-1057 standard,
LLDP for Media Endpoint Devices
. This protocol enables a
switch to configure and manage connected Media Endpoint devices that need to send media streams
across the network (for example, IP telephones and security cameras).
LLDPDU
(LLDP Data Unit) - A unit of information in an LLDP packet that consists of a sequence of
short variable length information elements, known as
TLVs
. LLDP pass-through is not supported in
conformance to IEEE standard.
MIB
(Management Information Base) - A virtual database that identifies each manageable object by its
name, syntax, accessibility, and status, along with a text description and unique object identifier (OID).
The database is accessible by a Network Management Station (NMS) using a management protocol
such as the Simple Network Management Protocol (SNMP).
Network connectivity device
- A forwarding 802 LAN device, such as a router, switch, or wireless
access point.
Station
- A node in a network.
TLV
(Type-Length-Value) - An information element in an LLDPDU that describes the type of information
being sent, the length of the information string, and the value (actual information) that will be
transmitted.
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