Accton Technology ES4626 - Manual (Page 164)

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“on” mode is completely joined forcedly, switch in other ends won’t exchange LACP
BPDU 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. (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 SwitchA and SwitchB are
aggregated in “on” mode and become an aggregated port respectively.
4.5 Port Channel Troubleshooting
If problems occur when configuring port aggregation, please first check the following
for causes.
z 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.
z Some commands cannot be used on a port in port-channel, such as arp, bandwidth,
ip, ip-forward, etc.
z When port-channel is forced, as the aggregation is triggered manually, the port group
will stay unaggregated if aggregation fails due to inconsistent VLAN information.
Ports must be added to or removed from the group to trigger another aggregation, if
VLAN information inconsistency persists, the aggregation will fail again. The
aggregation will only succeed when VLAN information is consistent and aggregation
is triggered due to port addition or removal.
z Verify that port group is configured in the partner end, and in the same configuration.
If the local end is set in manual aggregation or LACP, the same should be done in
the partner end; otherwise port aggregation will not work properly. Another thing to be
noted is that if both ends are configured with LACP, then at least one of them should
be in ACTIVE mode, otherwise LACP packet won’t be initiated.
z LACP cannot be used on ports with Security and IEEE 802.1x enabled.
4.6 Web Management
Click “Port channel configuration” to open LACP port group configuration and LACP port
configuration. LACP port group page will be used to configure and display group while
LACP port configuration page will be used to configure and display port group members.
4.6.1 LACP port group configuration