ciao! ok, so the problem is present also by using a classic ARP process? then, can you share the output of show spanning-tree vlan <xyz> when the portfast is NOT configured under the interface and also after enabled it? thanks for patience TKKFabioN

ciao! let me share with you a good document related to UDP broadcast packets handling https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipapp/configuration/15-mt/iap-15-mt-book/iap-bph.html#GUID-697E9340-CCAE-40A7-BD73-94EFA8538D98 I'm not sure it co...

ciao! this is a good design guide for Campus Network, you can find all devices role, with respective models. https://www.cisco.com/c/en/us/td/docs/solutions/CVD/Campus/cisco-campus-lan-wlan-design-guide.html TKK FabioN

ciao! let me share with you a document regarding this topic: https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3850/software/release/16-9/configuration_guide/stck_mgr_ha/b_169_stck_mgr_ha_3850/configuring_cisco_stackwise_virtual.html basical...