24-Port Layer 3 Switch Management Guide

C ONFIGURING THE S WITCH
3-80
Command Usage
Besides balancing the load across each port in the trunk, the other ports
provide redundancy by taking over the load if a port in the trunk fails.
However, before making any physical connections between devices, use
the Web interface or CLI to specify the trunk on the devices at both ends.
When using a port trunk, take note of the following points:
• Finish configuring port trunks before you connect the corresponding
network cables between switches to avoid creating a loop.
• You can create up to six trunks on the switch, with up to four ports per
trunk.
• The ports at both ends of a connection must be configured as trunk
ports.
• When configuring static trunks on switches of different types, they must
be compatible with the Cisco EtherChannel standard.
• The ports at both ends of a trunk must be configured in an identical
manner, including communication mode (i.e., speed, duplex mode and
flow control), VLAN assignments, and CoS settings.
• All the ports in a trunk have to be treated as a whole when moved from/
to, added or deleted from a VLAN.
• STP, VLAN, and IGMP settings can only be made for the entire trunk.
Dynamically Configuring a Trunk
Command Usage
• To avoid creating a loop in the network,
be sure you enable LACP before
connecting the ports, and also disconnect
the ports before disabling LACP.
• If the target switch has also enabled
LACP on the connected ports, the trunk
will be activated automatically.
active
links
}
}
dynamically
enabled
configured
members
backup
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