PLANET WGSW-52040 - Manual (Page 145)

corresponding Remote table with LLDP MED information on Ethernet1 of switch A.
17.4 LLDP-MED Troubleshooting
If problems occur when configuring LLDP-MED, please check whether the problem is caused
by the following reasons:
 Check whether the global LLDP is enabled.
 Only network connection device received LLDP packets with LLDP-MED TLV from
the near MED device, it sends LLDP-MED TLV. If network connection device
configured the command for sending LLDP-MED TLV, the packets also without
LLDP-MED TLV sent by the port, that means no MED information is received and
the port does not enable the function for sending LLDP-MED information.
 If neighbor device has sent LLDP-MED information to network connection device,
but there is no LLDP-MED information by checking show lldp neighbors command,
that means LLDP-MED information sent by neighbor is error.
Chapter 18 bpdu-tunnel Configuration
18.1 Introduction to bpdu-tunnel
BPDU Tunnel is a Layer 2 tunnel technology. It allows Layer 2 protocol packets of
geographically dispersed private network users to be transparently transmitted over specific
tunnels across a service provider network.
18.1.1 bpdu-tunnel function
In MAN application, multi-branches of a corporation may connect with each other by the
service provider network. VPN provided by the service provider enables the geographically
dispersed networks to form a local LAN, so the service provider needs to provide the tunnel
function, namely, data information generated by user’s network is able to inextenso arrive at
other networks of the same corporation through the service provider network. To maintain a
local concept, it not only needs to transmit the data within the user’s private network across the
tunnel, but also transmit layer 2 protocol packets within the user’s private network.
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