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Before you configure the operation mode of an Eth-Trunk interface, check
whether the Eth-Trunk interface contains member interfaces. If the Eth-Trunk
contains member interfaces, you cannot change the operation mode of the
Eth-Trunk interface. To delete member interfaces from the Eth-Trunk interface,
run the undo eth-trunk command in the member
interface view or run the undo trunkport interface-type interface-number command in the
Eth-Trunk interface view.
If one of the specified member interfaces cannot be added to the Eth-Trunk,
interfaces following this interface cannot be added to the Eth-Trunk.
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The maximum number of active interfaces must be larger than or equal to the
minimum number of active interfaces.
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The maximum number of active interfaces on the local switch can be different from that on the remote switch. If the two values are different, the smaller one is
used.
To ensure normal running of an Eth-Trunk interface, enable or disable LACP
preemption on both ends of the Eth-Trunk interface.
The LACP packet statistics cannot be restored after you clear them.
Debugging affects the performance of the system. Therefore, run the undo debugging all command to disable debugging
immediately after the debugging is complete.
The S3700HI does not support load balancing of
unknown unicast packets on an Eth-Trunk.
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After you run the lacp timeout command, the local end
informs the peer end of the timeout interval through LACP packets. If the fast keyword is used, the interval for sending LACP packets is
1 second. If the slow keyword is used, the interval for sending
LACP packets is 30 seconds.
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The timeout interval for receiving LACP packets is three times the interval
for sending LACP packets. In other words, when the fast keyword
is used, the timeout interval for receiving LACP packets is 3 seconds. When the slow keyword is used, the timeout interval for receiving LACP
packets is 90 seconds.
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You can select different keywords on the two ends. However, it is recommended
that you select the same keyword on both ends to facilitate the
maintenance.
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A CSS is a logical device formed by connecting two switches with stack
cables. Interfaces in a CSS are named in the format of chassis ID/slot
ID/subcard number/interface number. For example, the number 2 in GE 2/1/0/1 is
the chassis number.
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An inter-chassis Eth-Trunk interface contains member interfaces on both CSS
member switches. When a switch or a physical member interface fails, traffic can
be transmitted between chassis through stack cables. This ensures reliable
transmission and implements device backup.
Before configuring an Eth-Trunk interface to preferentially forward local
traffic, ensure that the outbound bandwidth of Eth-Trunk member interfaces is
sufficient for forwarding local traffic. If the outbound interface bandwidth is
insufficient, some packets are dropped.
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