SMC Networks TIGERSWITCH SMC6752AL2 Manual De Usuario

4-165

General Guidelines –
• Finish configuring port trunks before you connect the corresponding 

network cables between switches to avoid creating a loop.

• A trunk can have up to eight ports.
• The ports at both ends of a connection must be configured as trunk 

ports.

• All ports in 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.

• Any of the Gigabit ports on the front panel can be trunked together, 

including ports of different media types.

• All the ports in a trunk have to be treated as a whole when moved 

from/to, added or deleted from a VLAN via the specified 
port-channel.

• STP, VLAN, and IGMP settings can only be made for the entire trunk 

via the specified port-channel.

Dynamically Creating a Port Channel –
Ports assigned to a common port channel must meet the 

following criteria:

• Ports must have the same LACP system priority.
• Ports must have the same port admin key (Ethernet Interface).
• If the port channel admin key (lacp admin key - Port Channel) is not 

set when a channel group is formed (i.e., it has the null value of 0), this 
key is set to the same value as the port admin key (lacp admin key - 
Ethernet Interface) used by the interfaces that joined the group.

• However, if the port channel admin key is set, then the port admin key 

must be set to the same value for a port to be allowed to join a channel 
group.

• If a link goes down, LACP port priority is used to select the backup 

link.