Why unable to change the bonding option 'lacp_rate' on the running system (Doc ID 2259243.1)

Last updated on APRIL 27, 2017

Applies to:

Linux OS - Version Oracle Linux 6.0 and later
Information in this document applies to any platform.

Symptoms

 After changing 'lacp_rate' from 1(fast) to 0(slow) in the bonding configuration file as shown below, the network restarted and 'lacp_rate' was changed to 0(slow).
However, LACP packets in the tcpdump still collection switch 1 (Fast) mode.

1) configure two backup lan by LACP
2) It was set to default lacp_rate = 1 (fast). → Change lacp_rate to 0 (slow)
3) vi /etc/sysconfig/network-scripts/ifcfg-bond0 modified the lacp_rate value of the bonding options to 0 (slow) and tried to down / up the bond0 interface.
4) cat /proc/net/bonding/bond0 looks like LACP rate: slow
5) However, on the backup switch side, it is shown as fast

If it is changed to 0 (slow) normally, the default LACP packet should be sent every 30 seconds
But, It seems that even when tcpdump is opened in real OS, LACP packet is transmitted every 1 second.

Cause

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