Thanks for the answer. How can you explain that the problem is present for 9300M and not for 9500 or MS210. Every device has the same configuration (static IP configuration).   Best regards.     ... View more

Hello MaghM, we did some captures from L3 - Firewall  We didn't see the arp.duplicate-adresse-frame. The problem occurs randomly only on 9300M. Do you think we should have switch logs? we see nothing inside. ... View more

Hello, we apply all the recommandations but the problem is still present. All ideas are welcome. ... View more