5 port channel troubleshooting, Hannel, Roubleshooting – QTECH QSW-8300 Инструкция по настройке User Manual

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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.

6.5 Port Channel Troubleshooting

If problems occur when configuring port aggregation, please first check the following for

causes.

Ensure all ports in a port group have the same properties, i.e., whether they are in full-duplex

mode, forced to the same speed, and have the same VLAN properties, etc. If inconsistency

occurs, make corrections.

Some commands cannot be used on a port in port-channel, such as arp, bandwidth, ip, ip-

forward, etc.

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