5557720,   It sounds like a possible loop in the network. Would you verify what else is on that network and if the management port is on a separate management vlan from the other traffic?   Let me know.     
Hi all, the management port on one of our switches is behaving weirdly - connections frequently timeout. Around 1/5 pings make it through and back with roundtrip times <1ms as expected, the rest is lost somewhere, and there seems to be no regularity. This is observable on other protocols as well, such as ssh or SNMP; you can't get a stable connection via ssh to work with. On the serial console, everything works as expected. The switch logs a message on the console which might be relevant: "Mgmt port receiving excessive traffic; will be rate controlled" We do have a monitoring solution in place which polls all the switches in a 5m interval. However, all the other switches, including a very similar S4048T-ON, don't show this behavior, so I don't believe the message and the actual problem are directly connected. Any ideas? Best, Steve
S4048-ON timeouts on MGMT port