HP ProCurve 6400cl Series Management And Configuration Manual page 342

Configuring for Network Management Applications
LLDP (Link-Layer Discovery Protocol)
14-46
Displaying Advertisements Currently in the Neighbors MIB. These
commands display the content of the inbound LLDP advertisements received
from other LLDP devices. On Series 3400cl/6400cl switches, these commands
can also display the content of inbound CDP advertisements. (For more on
how the 3400cl/6400cl switches handle data received in CDP advertisements,
refer to "LLDP and CDP Data Management on the Series 3400cl and 6400cl
Switches" on page 14-32.
Syntax show lldp info remote-device [ port-list ]
Without the [ port-list ] option, this command provides a global
list of the individual devices it has detected by reading LLDP
advertisements (and also, on the 3400cl/6400cl switches, CDP
advertisements). Discovered devices are listed by the inbound
port on which they were discovered. Multiple devices listed for
a single port indicates one of the following:
• 5300xl Switches: Multiple devices listed for the same port
indicates that such devices are connected to the switch
through a hub.
• 3400cl/6400cl Switches: Multiple devices listed for the
same port indicates either or both of the following:
– A discovered device is transmitting both LLDP and CDP
packets with different chassis and port ID information.
– Multiple devices are connected to the switch through a hub.
Discovering the same device on multiple ports indicates that
the remote device may be connected to the switch in one of the
following ways:
– Through different VLANS using separate links. (This
applies to switches that use the same MAC address for all
configured VLANs.)
– Through different links in the same trunk.
– Through different links using the same VLAN. (In this
case, spanning-tree should be invoked to prevent a net-
work topology loop. Note that LLDP packets travel on links
that spanning-tree blocks for other traffic types.)
With the [ port-list ] option, this command provides a listing of
the LLDP data that the switch has detected in advertisements
received on the specified ports. Also, on 3400cl/6400cl switches
only, if neighbor data is read from CDP advertisements, the
switch remaps this information into the switch's LLDP neigh­
bors MIB in addition to the CDP Neighbors MIB.
For descriptions of the various types of information displayed
by these commands, refer to Table 14-2 on page 14-29.