configure sharing lacp fallback

configure sharing port lacp fallback [enable | disable]


This command provides the ability to configure fallback. If fallback is enabled and LACP PDUs are not received on LACP-configured ports within the timeout period, the port with the lowest priority value will be added to the aggregator. The port stays in this state until fallback is disabled or until LACP PDUs are exchanged between the switch and its link partner, causing LAG reconfiguration.

Syntax Description

port LAG group ID.
fallback Allow a single member port with lowest value priority to be added to the aggregator is LACP PDUs are not received within timeout.
enable Enable fallback. Port priority and fallback timeout control port aggregator membership.
disable Disable fallback. LACP PDUs or defaulted-state-action control port aggregator membership.




* # show lacp lag 17 detail 
Lag   Actor    Actor  Partner           Partner  Partner Agg   Actor
      Sys-Pri  Key    MAC               Sys-Pri  Key     Count MAC              
17          0  0x03f9 00:00:00:00:00:00       0  0x0000      1 00:04:96:6d:55:13 
Enabled          : Yes
LAG State        : Up
Unack count      : 0
Wait-for-count   : 0
Current timeout  : Long
Activity mode    : Active
Defaulted Action : Delete
Fallback         : Enabled
Fallback timeout : 40 seconds
Receive state    : Enabled
Transmit state   : Enabled
Minimum active   : 1
Selected count   : 1
Standby count    : 0
LAG Id flag      : Yes 
  S.pri:0   ,, K:0x03f9 
  T.pri:0   ,, L:0x0000 

Port list: 
Member     Port     Rx           Sel          Mux            Actor     Partner
Port       Priority State        Logic        State          Flags     Port    
17         10       Initialize   Unselected   Detached       A-G-----  0        
18         5        Initialize   Fallback     Collect-Dist   A-GSCD--  1018
19         5        Idle         Unselected   Detached       --------  0       
Actor Flags: A-Activity, T-Timeout, G-Aggregation, S-Synchronization             
             C-Collecting, D-Distributing, F-Defaulted, E-Expired


This command was first available in ExtremeXOS 21.1.

Platform Availability

This command is available on ExtremeSwitching X435, X440-G2, X450-G2, X460-G2, X465, X590, X620, X670-G2, X690, X695, X870, 5320, 5420, and 5520 series switches.