User`s manual

User’s Manual 167
Command Function Mode
interface port-channel Enters interface configuration mode and Configures a trunk GC
Channel-group Adds a port to a trunk IC (Ethernet)
Dynamic Configuration Command
lacp Configures LACP for the current interface IC (Ethernet)
lacp system-priority Configures a port's LACP system priority IC (Ethernet)
lacp admin-key Configures a port's administration key IC (Ethernet)
lacp admin-key Configures an port channel’s administration key IC (Port
Channel)
lacp port-priority Configures a port's LACP port priority IC (Ethernet)
Trunk Status Display Command
show interfaces status
port-channel
Shows trunk information NE, PE
show lacp Shows LACP information PE
Guidelines for Creating Trunks
• 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 (For
example, 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 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
(For example, 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.