Configuration C; Configuration D; Configuration E - 3Com 4007 Release Note

Configuration C

Ports autonegotiate connections according to the IEEE 802.3u
specification. The system monitors specified ports for errors and sends
alerts through traps and console messages. If a high error rate is detected
on a given port, Advanced Autonegotiation forces that port into full
duplex mode. The system continues to monitor the error rate to
determine if that action solved the problem or not. If errors above the
system threshold continue to exist, then Advanced Autonegotiation
partitions the port.

Configuration D

Autonegotiation does not occur because it is not enabled or does not
exist (100 FX). Thus, for 10/100 TX ports, the port speed and duplex
mode are fixed in some combination of 10 or 100 Mbps and half or full
duplex. 100 FX ports are fixed in either 100 half duplex or 100 full
duplex. The Port Monitoring feature monitors for errors and generates
alerts through traps and console messages. If the number of errors
exceed the system threshold, the system partitions the port.

Configuration E

Autonegotiation does not occur because it is not enabled or does not
exist (100 FX). Thus, for 10/100 TX ports, the port speed and duplex
mode are fixed in some combination of 10 or 100 Mbps and half or full
duplex. 100 FX ports are fixed in either 100 half duplex or 100 full
duplex. The Advanced Autonegotiation feature responds differently,
depending on the type of link:
10/100 TX links — The system monitors for errors and generates
„
alerts. If error thresholds are exceeded on 10/100 links, the system can
only partition the port because the duplex mode has been fixed. It
cannot change the mode from half duplex to full duplex or vice versa.
If you want the complete functionality of Advanced Autonegotiation on a
given 10/100 port, ensure that you also enable standard autonegotiation
on that port.
100 FX links — The system monitors for errors and generates alerts. If
„
error thresholds are exceeded, it can change the duplex mode from
half duplex to full duplex and vice versa. The system continues to
monitor the error rate to determine if the duplex change solved the
problem or not. If the error rate continues to exceed the system
threshold, then Advanced Autonegotiation partitions the port.
Advanced Autonegotiation 21