User's Manual

12-7
As shown in the figure, ports 1, 2, 3, 4 of S1 are access ports and add them to group1 with “on” mode. Ports 6,
8, 9, 10 of S2 are access ports and add them to group2 with “on” mode.
The configuration steps are listed below:
Switch1#config
Switch1(config)#interface ethernet 1/0/1
Switch1(Config-If-Ethernet1/0/1)#port-group 1 mode on
Switch1(Config-If-Ethernet1/0/1)#exit
Switch1(config)#interface ethernet 1/0/2
Switch1(Config-If-Ethernet1/0/2)#port-group 1 mode on
Switch1(Config-If-Ethernet1/0/2)#exit
Switch1(config)#interface ethernet 1/0/3
Switch1(Config-If-Ethernet1/0/3)#port-group 1 mode on
Switch1(Config-If-Ethernet1/0/3)#exit
Switch1(config)#interface ethernet 1/0/4
Switch1(Config-If-Ethernet1/0/4)#port-group 1 mode on
Switch1(Config-If-Ethernet1/0/4)#exit
Switch2#config
Switch2(config)#port-group 2
Switch2(config)#interface ethernet 1/0/6
Switch2(Config-If-Ethernet1/0/6)#port-group 2 mode on
Switch2(Config-If-Ethernet1/0/6)#exit
Switch2(config)#interface ethernet 1/0/8-10
Switch2(Config-If-Port-Range)#port-group 2 mode on
Switch2(Config-If-Port-Range)#exit
Configuration result:
Add ports 1, 2, 3, 4 of S1 to port-group1 in order, and we can see a group in “on” mode is completely joined
forcedly, switch in other ends won’t exchange LACP PDU to complete aggregation. Aggregation finishes
immediately when the command to add port 2 to port-group 1 is entered, port 1 and port 2 aggregate to be
port-channel 1, when port 3 joins port-group 1, port-channel 1 of port 1 and 2 are ungrouped and re-aggregate
with port 3 to form port-channel 1, when port 4 joins port-group 1, port-channel 1 of port 1, 2 and 3 are
ungrouped and re-aggregate with port 4 to form port-channel 1. (It should be noted that whenever a new port
joins in an aggregated port group, the group will be ungrouped first and re-aggregated to form a new group.)
Now all four ports in both S1 and S2 are aggregated in “on” mode and become an aggregated port
respectively.