Dell PowerSwitch S4128F-ON OS10 Enterprise Edition User Guide Release 10.4.1.0 - Page 170
LACP fallback
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Actor Admin: State Key 1 Priority 32768 Oper: State Key 1 Priority 32768 Partner Admin: State Key 0 Priority 0 Oper: State Key 1 Priority 32768 Port ethernet1/1/31 is Enabled, LACP is enabled and mode is lacp Actor Admin: State Key 1 Priority 32768 Oper: State Key 1 Priority 32768 Partner Admin: State Key 0 Priority 0 Oper: State Key 1 Priority 32768 Verify LAG membership OS10# show lacp interface ethernet 1/1/29 Interface ethernet1/1/29 is up Channel group is 1 port channel is po1 PDUS sent: 17 PDUS rcvd: 11 Marker sent: 0 Marker rcvd: 0 Marker response sent: 0 Marker response rcvd: 0 Unknown packetse rcvd: 0 Illegal packetse rcvd: 0 Local Port: MAC Address=74:e6:e2:f5:b5:80 System Identifier=32768,32768 Port Identifier=32768,32768 Operational key=1 LACP_Activity=passive LACP_Timeout=Long Timeout(30s) Synchronization=IN_SYNC Collecting=true Distributing=true Partner information refresh timeout=Long Timeout(90s) Actor Admin State=BCFHJKNO Actor Oper State=BDEGIKNO Neighbor: 276 MAC Address=00:00:00:00:00:00 System Identifier=,00:00:00:00:00:00 Port Identifier=0,14:18:77:7a:2d:00 Operational key=1 LACP_Activity=passive LACP_Timeout=Long Timeout(30s) Synchronization=IN_SYNC Collecting=true Distributing=true Partner Admin State=BCEGIKNP Partner Oper State=BDEGIKNO LACP fallback LACP fallback allows an active LACP interface to establish a port-channel before receiving LACP PDUs from the peer. This feature is useful in environments where Preboot Execution Environment (PXE) servers are connected to switch with LACP portchannel. Whenever a PXE server reboots, both the port-channel and ports go down. While rebooting, the ports come up, but not the port-channel. LACP fallback enables the port-channel to be up and keeps sending packets to the PXE server. The LACP fallback feature adds a member port to LACP port-channel if it does not receive LACP PDUs from the peer for a particular period of time. You can set the timer using the lacp fallback timeout timer-value command. The member port becomes active and sends packets to the PXE server. 170 Layer 2