Port+Channels

Fast EtherChannel (FEC) Gigabit EtherChannel (GEC)

=Configuration=

config-if# channel-group 1 mode on

=Load Balancing=

config# port-channel load-balance

=Discovery=

Port Aggregation Protocol (PAgP)
config-if# channel-group 1 mode [auto| desirable]

Link Aggregation Control Protocol (LACP)
config-if# channel-group 1 mode [active|passive]

Requirements
Same speed and Duplex If not trunking then same access VLAN If trunking, same trunk type, same allowed VLANs and same native VLAN Same STP cost per VLAN on all links in channel No SPAN & RSPAN