3Com WXR100 3CRWXR10095A, WX4400 3CRWX440095A manual Gigabit Ports Autonegotiation and Flow Control

80CHAPTER 5: CONFIGURING AND MANAGING PORTS AND VLANS

To set the port speed on ports 1 and 3 through 5 to 10 Mbps, type the following command:

WX1200# set port speed 1,3-5 10

Gigabit Ports — Autonegotiation and Flow Control

WX gigabit ports use autonegotiation by default to determine capabilities for 802.3z flow control parameters. The gigabit ports can respond to IEEE 802.3z flow control packets. Some devices use this capability to prevent packet loss by temporarily pausing data transmission.

To disable flow control negotiation on a WX gigabit port, use the following command:

set port negotiation port-list{enable disable}

Disabling or Reenabling a Port

All ports are enabled by default. To administratively disable a port, use the following command:

set port {enable disable} port-list

A port that is administratively disabled cannot send or receive packets.

This command does not affect the link state of the port.

Disabling or Reenabling Power over Ethernet

Power over Ethernet (PoE) supplies DC power to a device connected to a MAP access port. The PoE state depends on whether you enable or disable PoE when you set the port type. (See “Setting the Port Type” on page 71.)

CAUTION: Use the WX switch’s PoE only to power 3Com MAPs. If you enable PoE on ports connected to other devices, damage can result.

PoE is supported only on 10/100 Ethernet ports. PoE is not supported on any gigabit Ethernet ports, or on ports 7 and 8 on a WX1200 switch.

To change the PoE state on a port, use the following command:

set ap <apnum> port <portnumb> model <ap_type> poe {enable disable}