Hi @Chango , Most probably one interface from aggregate group is connected to one switch and other to 2nd switch and both the physical switches are virtually clustered into one. When we do this on switch it will generate one system ID which would be virtual and will use it for lacp negotiation ( it will not use physical system ID since it will be two in numbers and each would be specific to each switch. 2019/09/27 16:10:17 critical lacp ethern lacp-up 0 LACP interface ethernet1/7 moved into AE-group ae1. 2019/09/27 16:10:16 info lldp ethern mib cha 0 Update: Received change on local interface ethernet1/9 chassis id: d8:24:bd:91:fd:c0. New neighbor added to mib. 2019/09/27 16:10:13 critical lacp ethern lacp-up 0 LACP interface ethernet1/9 moved into AE-group ae1. 2019/09/27 16:10:11 info lldp ethern mib cha 0 Update: Received change on local interface ethernet1/8 chassis id: d8:24:bd:91:fd:c0. New neighbor added to mib. 2019/09/27 16:10:08 critical lacp ethern lacp-up 0 LACP interface ethernet1/8 moved into AE-group ae1. 2019/09/27 16:10:06 info lldp ethern mib cha 0 Update: Received change on local interface ethernet1/22 chassis id: 44:ec:ce:64:c9:12. New neighbor added to mib. 2019/09/27 16:10:01 info lldp ethern mib cha 0 Update: Received change on local interface ethernet1/10 chassis id: d8:24:bd:91:fd:c0. New neighbor added to mib. 2019/09/27 16:10:01 info lldp ethern mib cha 0 Update: Received change on local interface ethernet1/21 chassis id: 44:ec:ce:6f:81:28. New neighbor added to mib. am seeing that the aggregate group (ae1) got the actor's virtual mac but it is flapping because peer is configured on fast rate and firewall is requesting for the next packet again in few seconds. mp l2ctrld.log 2019-09-27 16:10:06 sys_pri 32768, system_mac 02:00:00:00:00:64, key 22, port_pri 32768, port_num 6149, state 0x7f mp l2ctrld.log 2019-09-27 16:10:06 partner mp l2ctrld.log 2019-09-27 16:10:06 sys_pri 0, system_mac 00:00:00:00:00:00, key 0, port_pri 0, port_num 0, state 0x0 ****In fast mode if we don't receive lacpdu for 3 seconds lacp will go down. So it's very sensitive to network churn** Please configure both the devices on slow transmission rate . Regards. EC
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