P
ORT

T

RUNK

C

ONFIGURATION

3-51

Port Trunk Configuration
Port trunks can be used to increase the bandwidth of a network
connection or to ensure fault recovery. You can configure up five trunk
connections (combining 2~4 ports into a fat pipe) between any two
standalone SMC6924MT 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 (MT-RJ,
100 Mbps fiber, 1000 Mbps fiber, or 10/100/1000 Mbps RJ-45). The
ports that can be assigned to the same trunk have certain other
restrictions as described on page 3-53.
• 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.