3Com 10002211 manual Default To select the default all, press Return

What’s New at Revision 8.2.0? 17

Top-Level Menu

5Enter full to set the port to full-duplex mode or half to set the port to half-duplex mode.

Default The port’s current setting is indicated in brackets. To select this default, press Return. This action leaves the port duplex mode unchanged.

6Repeat steps 4 and 5 to configure all the selected ports in all the selected slots.

Changing the mode to full-duplex disables collision detection on these ports.

Intelligent Flow Management (IFM). Intelligent flow management (IFM) is a congestion control mechanism that is built into the CoreBuilder system. You should implement IFM on any Fast Ethernet port that has a high volume of traffic. By default, IFM is enabled on CoreBuilder module ports.

Congestion is caused when one or more devices send traffic to an already congested port. If the port is connected to another CoreBuilder system or to an end station, IFM minimizes packet loss and inhibits the sending device from generating more packets until the congestion ends.

Intelligent flow management is supported only on half-duplex ports. It is disabled on port that are configured for full-duplex mode. 3Com recommends that you disable IFM on network segments that are connected to repeaters.

To apply IFM to a half-duplex Fast Ethernet port:

1From the top level of the Administration Console, enter:

system
➧ethernet	summary
fddi
	detail	s
			duplexMode
tokenring➧fastEthernet
			➧ifm
bridge	label
ip
	portState
ipx
appletalk
snmp
analyzer
script
logout

ethernet fastEthernet ifm

A prompt similar to the following one appears:

Select slot(s) (10-12all):

This prompt indicates that the CoreBuilder 6000 system contains configurable Fast Ethernet ports in slots 10, 11, and 12.

2Enter the number(s) of the slot(s) that contain ports that you want to set to IFM mode:

10-12

Default To select the default all, press Return.