System information

6-4
Optimizing Port Usage Through Traffic Control and Port Trunking
Viewing Port Status and Configuring Port Parameters
Optimizing Port Usage
Through Traffic Control and
100/1000Base-T ports:
• Auto (default): Senses speed and negotiates with the port at the other end of the link for port operation
(MDI-X or MDI).
To see what the switch negotiates for the Auto setting, use the CLI show interfaces command or the
“ 3. Port Status” option under “1. Status and Counters” in the menu interface.
• 1000Fdx: 1000 Mbps (1Gbps), Full-Duplex only
• 100Fdx: 100 Mbps, Full-Duplex
Notes:
• Changing the port speed on a transceiver port requires a reboot of the switch.
• Ensure that the device attached to the port is configured for the same setting that you select here.
Also, if “Auto” is used, the device to which the port is connected must also be configured to “Auto”
and operate in compliance with the IEEE 802.3ab “Auto Negotiation” standard for 1000Base-T
networks.
Gigabit fiber-optic ports (Gigabit-SX and Gigabit-LX):
• 1000FDx (default): 1000 Mbps (1 Gbps), Full Duplex only
• Auto: The port operates at 1000FDx and auto-negotiates flow control with the device connected to
the port.
Flow Control • Disabled (default): The port will not generate flow control packets and drops received flow control
packets.
• Enabled: The port uses 802.3x Link Layer Flow Control, generates flow control packets, and processes
received flow control packets.
With the port mode set to Auto (the default) and Flow Control enabled, the switch negotiates Flow Control
on the indicated port. If the port mode is not set to Auto, or if Flow Control is disabled on the port, then
Flow Control is not used.
Bcast Limit Specifies the theoretical maximum of network bandwidth percentage that can be used for broadcast and
multicast traffic. Any broadcast or multicast traffic exceeding that limit will be dropped. Zero (0) means
the feature is disabled.
Note: If broadcast limits are configured on a group of ports, and those ports are later configured as
a trunk, then the broadcast limit for the trunk will be the highest limit that was previously configured
on the individual ports in the trunk.
Group (menu)
or
Trunk Group
(CLI)
Menu Interface: Specifies the static trunk group, if any, to which a port belongs.
CLI: Appears in the
show lacp command output to show the LACP trunk, if any, to which a port belongs.
Note: An LACP trunk requires a full-duplex link. In most cases, HP recommends that you leave the
port Mode setting at Auto (the default). See the LACP Note on page 6-11.
For more on port trunking, see “Port Trunking” on page 6-10.
Type This parameter appears in the CLI
show trunk listing and, for a port in a trunk group, specifies the type
of trunk group. The default Type is passive LACP, which can be displayed by using the CLI show lacp
command.
For more on port trunking, see “Port Trunking” on page 6-10.
Status or
Parameter
Description