Hi, I am using Centos7 with v3.10 kernel.
My issue is related to multiaggregation in LACP. In my setup topology I connected linux server and a L2 switch back to back with 2 interfaces eth0 and eth1 (on both sides). On Switch I have mapped eth0 to po1 and eth1 to po2. On linux server I have created a single bond interface with both interfaces eth0 and eth1. On L2 switch both po1 and po2 has same system-id but the Actor key is different i.e. on PO1 it is 16385 and on PO2 it is 32768. As per the information available about bond0 on linux server which is given below Active aggregator ID is 1 which is mapped to eth0 but eth1. But we have observed that eth1 on linux server is also sending LACPDUS with Collecting/Distributing bit set as 1. Which will result in single bond interface on Linux server is splitted into multiple port-channels on Switch causing duplication of frames on linux server. As per IEEE 802.3ad 2003 standard portchannel should not support multi-aggregation. # cat /proc/net/bonding/bond0 Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011) Bonding Mode: IEEE 802.3ad Dynamic link aggregation Transmit Hash Policy: layer2 (0) MII Status: up MII Polling Interval (ms): 100 Up Delay (ms): 0 Down Delay (ms): 0 802.3ad info LACP rate: fast Min links: 0 Aggregator selection policy (ad_select): stable Active Aggregator Info: Aggregator ID: 1 Number of ports: 1 Actor Key: 17 Partner Key: 16385 Partner Mac Address: 11:11:22:22:33:33 Slave Interface: eth0 MII Status: up Speed: 1000 Mbps Duplex: full Link Failure Count: 0 Permanent HW addr: 08:00:27:18:ae:4b Aggregator ID: 1 Slave queue ID: 0 Slave Interface: eth1 MII Status: up Speed: 1000 Mbps Duplex: full Link Failure Count: 0 Permanent HW addr: 08:00:27:76:35:a2 Aggregator ID: 3 Slave queue ID: 0 Regards, Ajith -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html