When any configuration changes are made on the Aggregated Ethernet interface that are related to removing and adding an AE IFL, the member link may not get added to the bundle and kernel speed mismatch errors may be observed on the ACX710 platform.

The issue is observed when the SFP that is inserted is of 1G speed when the same port can support 10G speed as well. To resolve the kernel speed mismatch errors, you will need to set the speed explicitly on the member interfaces and the AE interface.

This issue is seen on releases prior to 20.3R3 and has been addressed in subsequent releases.

When the SFP inserted has 1G speed (example:SFP-T) but the port can support 10G speed.

The following output shows that the speed of the AE interface is set to 10 Gbps but you are using SFP, which only supports 1 Gbps speed.

show interfaces ae10
Physical interface: ae10, Enabled, Physical link is Up
 Interface index: 128, SNMP ifIndex: 549
 Description: Test
 Link-level type: Flexible-Ethernet, MTU: 9192, Speed: 10Gbps, BPDU Error: None, Ethernet-Switching Error: None, MAC-REWRITE Error: None,
 Loopback: Disabled, Source filtering: Disabled, Flow control: Disabled, Minimum links needed: 1, Minimum bandwidth needed: 1bps

The following logs are reported:

kernel: %KERN-2: bundle ae10.468: link xe-0/0/2 not added due to speed mismatch
kernel: %KERN-2: bundle ae10.468: link xe-0/0/3 not added due to speed mismatch
kernel: %KERN-2: bundle ae10.468: link xe-0/0/4 not added due to speed mismatch
kernel: %KERN-2: bundle ae10.468: link xe-0/0/5 not added due to speed mismatch
kernel: %KERN-2: bundle ae10.487: link xe-0/0/2 not added due to speed mismatch
kernel: %KERN-2: bundle ae10.487: link xe-0/0/3 not added due to speed mismatch
kernel: %KERN-2: bundle ae10.487: link xe-0/0/4 not added due to speed mismatch
kernel: %KERN-2: bundle ae10.487: link xe-0/0/5 not added due to speed mismatch
kernel: %KERN-2: bundle ae10.492: link xe-0/0/2 not added due to speed mismatch
kernel: %KERN-2: bundle ae10.492: link xe-0/0/3 not added due to speed mismatch
kernel: %KERN-2: bundle ae10.492: link xe-0/0/4 not added due to speed mismatch
kernel: %KERN-2: bundle ae10.492: link xe-0/0/5 not added due to speed mismatch 

To resolve the kernel speed mismatch errors, set the speed explicitly on the member interfaces and the AE interface:

set interfaces xe-0/0/2 speed 1g
set interfaces xe-0/0/3 speed 1g
set interfaces xe-0/0/4 speed 1g
set interfaces xe-0/0/5 speed 1g;
set interfaces ae10 aggregated-ether-options link-speed 1g;

2023-04-23:  Added that this issue is seen on releases prior to 20.3R3 and has been addressed in subsequent releases.
2023-03-27: Initial Draft for Review