SMC Networks SMC6724L3 manual Link Aggregation Commands, Guidelines for Creating Trunks

LINK AGGREGATION COMMANDS

Link Aggregation Commands

Ports can be statically grouped into an aggregate link (i.e., trunk) to increase the bandwidth of a network connection or to ensure fault recovery. Or you can use the Link Aggregation Control Protocol (LACP) to automatically negotiate a trunk link between this switch and another network device. For static trunks, the switches have to comply with the Cisco EtherChannel standard. For dynamic trunks, the switches have to comply with LACP. This switch supports up to six trunks. For example, a trunk consisting of two 1000 Mbps ports can support an aggregate bandwidth of 4 Gbps when operating at full duplex.

Command	Function	Mode	Page
Manual Configuration	Commands
interface	Configures a trunk and enters interface	GC	4-119
port-channel	configuration mode for the trunk
channel-group	Adds a port to a trunk	IC	4-138
Dynamic Configuration	Command
lacp	Configures LACP for the current interface	IC	4-139
Trunk Status Display	Command
show interfaces	Shows trunk information	NE,	4-128
status port-channel		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 four 10/100 Mbps ports or up to two 1000 Mbps ports.

•The ports at both ends of a connection must be configured as trunk ports.

•All ports in a trunk must consist of the same media type (i.e., twisted-pair or fiber).

•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.

4-137