Enterasys fn100 Betriebsanweisung

If your network configuration requires you to connect two or more FN100 
switches together, but the applications you are running over the network 
require more than 100 Mbps of bandwidth per connection, you can use 
the built-in trunking feature to increase bandwidth up to 800 Mbps, 
without installing additional hardware on your network. The FN100 
supports up to 8 trunk groups with 2 to 8 ports per trunk group.

Trunking is a Cabletron Systems proprietary extension to the 802.1D 
Spanning Tree algorithm. It enables you to use multiple 100BASE-TX or 
100BASE-FX Ethernet segments to connect FN100 switches together, 
while maintaining first-in, first-out ordering of Ethernet packets. In 
addition, if any of the Ethernet segments configured for trunking become 
inoperable, those Ethernet segments are automatically bypassed.

Figure 1-9 shows two FN100 switches connected by four 100BASE-TX 
crossover cables. You can connect up to eight ports for sharing the traffic 
load. Any additional connected ports become standby ports. The 
connections must be point-to-point. That is, there cannot be any other 
devices on the Ethernet segments.