Alcatel-Lucent omnistack 6124 User Manual

Using the System Configuration Program

2-34

Port trunks can be used to increase the bandwidth of a network connection or to 
ensure fault recovery. You can configure up to five trunk connections (combining 2~4 
ports into a fat pipe) between any two standalone OmniStack

®

 6124 switches, or up 

to 12 for an entire stack. However, before making any physical connections between 
devices, use the Trunk Configuration menu to specify the trunk on the devices at 
both ends. When using a port trunk, note that:

• The ports used in a trunk must all be of the same media type (RJ-45, 100 Mbps 

fiber, 1000BASE-SX or 1000BASE-LX). The ports that can be assigned to the 
same trunk have certain other restrictions as described on page 2-36.

• Ports can only be assigned to one trunk.
• The ports at both ends of a connection must be configured as trunk ports.
• The ports at both ends of a trunk must be configured in an identical manner, 

including speed, duplex mode, and VLAN assignments.

• None of the ports in a trunk can be configured as a mirror source port or mirror 

target port.

• All the ports in a trunk have to be treated as a whole when moved from/to, added 

or deleted from a VLAN.

• The Spanning Tree Algorithm will treat all the ports in a trunk as a whole. 
• Enable the trunk prior to connecting any cable between the switches to avoid 

creating a loop. 

• Disconnect all trunk port cables or disable the trunk ports before removing a port 

trunk to avoid creating a loop.