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S2989G-24TX Operation Manual Chapter 2 Layer 2 services

Configuration

Figure 2-10 Configure Port Channel in ON mode

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

1/0/2 to port-group 1 is entered, port 1 and port 2 aggregate to be port-channel 1, when

port 1/0/3 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 1/0/4 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