I have same problem but on 3650 version Cisco IOS Software [Everest], Catalyst L3 Switch Software (C...

the problem repeats every day, I have to disconnect the devices and they are reachable again

I ran the update, and it looks like everything works for the dot1x part. I noticed that the problem ...

I think it's better to go back to the everest version, if anything I will update it from 16.6.5 to 1...

I did, if you look at the last message it is the sh mac address and the strange thing is that the ma...

Vlan Mac Address Type Ports---- ----------- -------- -----192 001e.135c.8958 STATIC Gi3/0/41246 001e...

interface GigabitEthernet3/0/41description "PC e SoftPhone"switchport access vlan 246switchport mode...

ok but the problem of security violation happens even without port security

these are the mac addresses that you see on the interface.the phone is seen twice, in the other vers...

I updated the switches to the denali version, I immediately had problems with 802.1x, so I had to di...

I am sure that it is not the wisest thing to update almost 60 switches now.there must be a solution ...

I have a syslog server, besides the ports that go down and then up, I don't have any other logs. The...

Not yet, which version should I install? the current one is the recommended one

I have attached two screenshots of an interface where a network hard disk is connected, which was no...

Is it normal that some ARP results have different time on the two cores?