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.
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. |
Disabled.
* # 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 , S.id:00:04:96:6d:55:13, K:0x03f9 T.pri:0 , T.id:00:00:00:00:00:00, 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.
This command is available on ExtremeSwitching X435, X440-G2, X450-G2, X460-G2, X465, X590, X620, and X695 series switches.