Hi,
I'm sorry.
Thank you for pointing out.
Windows teaming + NLB unicast mode was the cause.
Because the NLB's unicast mode shares the same MAC address, packets arrive on each interface, so packets received by each interface were duplicated.
Since the connection destination switch was compatible with IGMP snooping, solving it by enabling IGMP snooping and making NLB from unicast mode to IGMP multicast.
Thanks for the advice.
Thank you very much.
I'm sorry.
Thank you for pointing out.
Windows teaming + NLB unicast mode was the cause.
Because the NLB's unicast mode shares the same MAC address, packets arrive on each interface, so packets received by each interface were duplicated.
Since the connection destination switch was compatible with IGMP snooping, solving it by enabling IGMP snooping and making NLB from unicast mode to IGMP multicast.
Thanks for the advice.
Thank you very much.