Número del artículo: 000142785
When creating a LACP Link Aggregation, all Force10 switches (except for the I/O Aggregator) have two transmit timer values. This value determines how often the ports send LACPDUs. The default is one LACPDU sent every 1 second. You can also configure it to send one every 30 s with the lacp long-timeout command. Long-timeout is best practice and recommended for the Force10 switches.
When the LACPDU transmits timer values mismatch, this can cause intermittent ungrouping of ports, thus causing connection issues. The following command and output helps determine how many LACPDUs being sent and received. This example uses LACP 10.
FTOS#clear lacp 10 counters FTOS#show lacp 10 counters ---------------------------------------------------------------------- LACP PDU Marker PDU Unknown Illegal Port Xmit Recv Xmit Recv Pkts Rx Pkts Rx ---------------------------------------------------------------------- Gi 0/1 4560 152 0 0 0 0 Gi 0/3 4560 152 0 0 0 0
As you can see, Xmit represents LACP PDUs sent and Recv is received from the partner device. In this scenario, the Force10 switch is sending LACP PDUs faster than the connecting device. To resolve this, we run the following command to send LACP PDUs every 30 s instead.
FTOS#config FTOS(conf)#interface po 10 FTOS(conf-if-po-10)#lacp long-timeout FTOS(conf-if-po-10)#end FTOS#wr
lacp long-timeout in the port channel interface configuration instead.
Now verify the timers again.
FTOS#clear lacp 10 counters FTOS#show lacp 10 counters ---------------------------------------------------------------------- LACP PDU Marker PDU Unknown Illegal Port Xmit Recv Xmit Recv Pkts Rx Pkts Rx ---------------------------------------------------------------------- Gi 0/1 10 11 0 0 0 0 Gi 0/3 10 11 0 0 0 0
The two switches are sending and receiving LACP PDUs at the same speed. Keep in mind that this lacp long-timeout is best practice in Force10 and is recommended.
29 ago 2023
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