RTS DV-3400 Technical Information PDF herunterladen (Seite 404)

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101

Configuring for Network Management Applications

LLDP (Link-Layer Discovery Protocol)

Advertising Device Capability, Network Policy, PoE

Status and Location Data

The medTlvEnable option on the switch is enabled in the default configuration

and supports the following LLDP-MED TLVs:

■ LLDP-MED capabilities: This TLV enables the switch to determine:

• whether a connected endpoint device supports LLDP-MED

• which specific LLDP-MED TLVs the endpoint supports

• the device class (1, 2, or 3) for the connected endpoint

This TLV also enables an LLDP-MED endpoint to discover what LLDP-

MED TLVs the switch port currently supports.

■ network policy operating on the port to which the endpoint is connected

(VLAN, Layer 2 QoS, Layer 3 QoS)

■ PoE (MED Power-over-Ethernet)

■ physical location data — page 56

Note LLDP-MED operation requires the macphy_config TLV subelement—enabled

by default—that is optional for IEEE 802.1AB LLDP operation. Refer to the

dot3TlvEnable macphy_config command on page 15-46.

Network Policy Advertisements. Network policy advertisements are

intended for real-time voice and video applications, and include these TLV

subelements:

■ Layer 2 (802.1p) QoS

■ Layer 3 DSCP (diffserv code point) QoS

■ Voice VLAN ID (VID)

VLAN Operating Rules. These rules affect advertisements of VLANs in

network policy TLVs:

■ The VLAN ID TLV subelement applies only to a VLAN configured for voice

operation (vlan < vid > voice).

■ If there are multiple voice VLANs configured on a port, LLDP-MED

advertises the voice VLAN having the lowest VID.

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