System information

Configuring for Network Management Applications
LLDP (Link-Layer Discovery Protocol)
LLDP-MED (Media-Endpoint-Discovery) for the
5300xl and 4200vl Switches
As of October 2006, LLDP-MED operates only on 5300xl switches running
software release E.10.x or greater, and 4200vl switches.
LLDP-MED (ANSI/TIA-1057/D6) extends the LLDP (IEEE 802.1AB) industry
standard to support advanced features on the network edge for Voice Over IP
(VoIP) endpoint devices with specialized capabilities and LLDP-MED
standards-based functionality. LLDP-MED uses the standard LLDP commands
described earlier in this section, with some extensions, and also introduces
new commands unique to LLDP-MED operation. The show commands
described elsewhere in this section are applicable to both LLDP and LLDP-
MED operation. LLDP-MED benefits include:
■ plug-and-play provisioning for MED-capable, VoIP endpoint devices
■ simplified, vendor-independent management enabling different IP
telephony systems to interoperate on one network
■ automatic deployment of convergence network policies (voice
VLANs, Layer 2/CoS priority, and Layer 3/QoS priority)
■ configurable endpoint location data to support the Emergency Call
Service (ECS) (such as Enhanced 911 service, 999, 112)
■ detailed VoIP endpoint data inventory readable via SNMP from the
switch
■ Power over Ethernet (PoE) status and troubleshooting support via
SNMP
■ support for IP telephony network troubleshooting of call quality
issues via SNMP
This section describes how to configure and use LLDP-MED features in the
5300xl switches running software release E.10.x or greater, and 4200vl
switches, to support VoIP network edge devices (Media Endpoint Devices)
such as:
■ IP phones
■ voice/media gateways
■ media servers
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