Hi I also had this problem several times and was able to solve it as follows. As soon as I deleted the “ip dhcp snooping vlan xxx” from the configuration, the CPU went from >75-80% “high SISF main thread” back to approx. 2-5%.Since it was not a solut...

Hi Community I had the similar problem with a C9300 in the stack and it occurred on the 4th stackswitch, on the last one. (IOS 17.3.4) The solution for my problem was, with the command "sh switch stack-ports detail" I could see some CRC errors. So I ...