◦ System capabilities Supported (TLV subelement)
◦ System capabilities Enabled (TLV subelement)
• Port speed and duplex (TLV subelement)
Optional data types, when enabled, are populated with data internal to the switch; that is, you cannot use LLDP
commands to configure their actual content.
Support for port speed and duplex advertisements
This feature is optional for LLDP operation, but is
required
for LLDP-MED operation.
Port speed and duplex advertisements are supported on the switches to inform an LLDP endpoint and the switch
port of each other's port speed and duplex configuration and capabilities. Configuration mismatches between a
switch port and an LLDP endpoint can result in excessive collisions and voice quality degradation. LLDP enables
discovery of such mismatches by supporting SNMP access to the switch MIB for comparing the current switch
port and endpoint settings. (Changing a current device configuration to eliminate a mismatch requires intervention
by the system operator.)
An SNMP network management application can be used to compare the port speed and duplex data configured
in the switch and advertised by the LLDP endpoint. You can also use the CLI to display this information. For more
information on using the CLI to display port speed and duplex information, see
Viewing the current port speed
and duplex configuration on a switch port
on page 244.
Configuring support for port speed and duplex advertisements (CLI)
For more information, see
Support for port speed and duplex advertisements
on page 230.
Syntax:
[no] lldp config <
port-list
> dot3TlvEnable macphy_config
Options
macphy_config
MAC Physical Config TLV
poeplus_config
Power Via MDI Config TLV
eee_config
EEE Config TLV
For outbound advertisements, this TLV includes the (local) switch port's current speed and duplex settings, the
range of speed and duplex settings the port supports, and the method required for reconfiguring the speed and
duplex settings on the device (autonegotiation during link initialization, or manual configuration).
Using SNMP to compare local and remote information can help in locating configuration mismatches.
(Default: Enabled)
NOTE:
For LLDP operation, this TLV is optional. For LLDP-MED operation, this TLV is mandatory.
Port VLAN ID TLV support on LLDP
The
port-vlan-id
option enables advertisement of the port VLAN ID TLV as part of the regularly advertised
TLVs. This allows discovery of a mismatch in the configured native VLAN ID between LLDP peers. The
information is visible using
show
commands and is logged to the Syslog server.
230
Aruba 2930F / 2930M Management and Configuration Guide
for ArubaOS-Switch 16.08
