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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.
Guidelines for Creating Trunks
General Guidelines –
• Finish configuring port trunks before you connect the corresponding
network cables between switches to avoid creating a loop.
Command Function Mode Page
Manual Configuration Commands
interface port-channel Configures a trunk and enters interface
configuration mode for the trunk
GC 3-1
channel-group Adds a port to a trunk IC (Ethernet) 3-21
Dynamic Configuration Command
lacp Configures LACP for the current
interface
IC (Ethernet) 3-22
lacp system-priority Configures a port's LACP system priority IC (Ethernet) 3-24
lacp admin-key Configures a port's administration key IC (Ethernet) 3-25
lacp admin-key Configures an port channel’s
administration key
IC (Port
Channel)
3-26
lacp port-priority Configures a port's LACP port priority IC (Ethernet) 3-27
Trunk Status Display Command
show interfaces status
port-channel
Shows trunk information NE, PE 3-11
show lacp Shows LACP information PE 3-28