Lag interfaces are showing down after upgradation from 18.1R3 to 20.4R3-S9 or above versions.

• Lag interfaces are showing down after upgradation from 18.1R3 to 20.4R3-S9 or above versions.
• we will not be able to check any outputs and interface are part of lacp when we run "show lacp interface ae" command.

Sample outputs:

  #show configuration interface ae0

    ae0 {
        gratuitous-arp-reply;
        aggregated-ether-options {
            minimum-links 1;
            link-speed 1g;
            lacp {
                active;
                periodic fast;
            }
        }
        unit 0 {
            family ethernet-switching {
                interface-mode access;
                vlan {
                    members VLAN-200;

• In above configuration we can see that the speed is manually set under the ae interface to make the ae interface up remove the configuration using below command and set it under the physical interface.

#delete interface ae0 aggregated-ether-options link-speed 1g >>>Remove from the LAG interface

• This happened due to the configuration when we configure the speed manually under the ae interfaces.

• Remove the speed configuration from the ae interface and if the manual speed configuration is must then you can configure that under the physical interfaces for the stability.

2024-07-25: Article validated
2023-12-31 : Article Created