Operation Manual

Port Commands
Port Commands
5 – 57
set port negotiation
Disables or reenables autonegotiation on gigabit Ethernet or 10/100 Ethernet ports.
Syntax set port negotiation port-list {enable | disable}
Defaults Autonegotiation is enabled on all Ethernet ports by default.
Access Enabled.
History Introduced in MSS Version 1.0.
Usage The gigabit Ethernet ports operate at 1000 Mbps only. They do not change speed to match
10-Mbps or 100-Mbps links.
MX-8, MX-200, and MX-216 10/100 Ethernet ports support half-duplex and full-duplex operation.
Table 5– 6 lists the supported configurations.
It is recommended that you do not configure the mode of an MX port so that one side of the link is set
to autonegotiation while the other side is set to full-duplex. Although MSS allows this configuration,
it can cause slow throughput on the link. The slow throughput occurs because the side that is
configured for autonegotiation falls back to half-duplex. A stream of large packets sent to an MX port
with this configuration can cause forwarding on the link to stop.
Examples The following command disables autonegotiation on ports 3, 8, and 16 through 18:
MX# set port negotiation 3,8,16-18 disable
The following command enables autonegotiation on port 21:
MX# set port negotiation 21 enable
set port poe
Enables or disables Power over Ethernet (PoE) on ports connected to MPs.
Syntax set port poe port-list enable | disable
Defaults PoE is disabled on network and wired authentication ports. The state on MP ports depends
on whether you enabled or disabled PoE when setting the port type. See set port type ap on
page 5-59.
Access Enabled.
port-list List of physical ports. MSS disables or reenables autonegotiation on all the
specified ports.
enable Enables autonegotiation on the specified ports.
disable Disables autonegotiation on the specified ports.
W arning!
When you set the port type for MP use, you can enable PoE on the port. Use the MX
PoE to power Trapeze Networks MP access points only. If you enable PoE on ports
connected to other devices, damage can result.
port-list List of physical ports. MSS disables or reenables PoE on all the specified ports.
enable Enables PoE on the specified ports.
disable Disables PoE on the specified ports.