I found that when icmp reply from 18.104.22.168 to 22.214.171.124,these icmp reply packets will be sent to SW13 and SW14 at the same time,the icmp reply packets which sent to SW13 with S-IP:126.96.36.199 and S-MAC:d9bc,other icmp reply packets which sent to SW14 with S-IP:188.8.131.52 and S-MAC:66ec,in other words,this is “ip flapping" issue.
in this case,when 184.108.40.206 ping 220.127.116.11 without interruption,i found 18.104.22.168 can receive icmp reply packets from 22.214.171.124 without interruption,but more than 10 minutes later it can not receive icmp reply packets suddenly，show endpoints command on APIC list 126.96.36.199 associate mac is d9bc;after a few minutes 188.8.131.52 can receive icmp reply packets again and show endpoints command on apic list 184.108.40.206 associate mac is 66ec.
enable arp flooding
i think this feature can resolve this problem,but it is not root cause for this probelm.
1.I want to know the root cause for 220.127.116.11 can not receive icmp reply packet suddenly.
2.this is NIC Teaming active/active without vPC config at server side,so it can cause ip flapping.Does this phenomenon have anything to do with "endpoint loop protection or rogue endpoint control"?
3.if there have others method to resolve this problem without enable arp flooding?
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