Spanning tree was configured and enabled on C1111 router, but show spanning tree shows no spanning tree information as below. Does anyone know what the issue is and how to fix it? Thank you. router#sh run | s spanningspanning-tree extend system-idspa...

High CPU spikes occurred occasionally on C881-K9 router. After checked, the high cpu usage is caused by SNMP ENGINE. Does anyone know why SNMP ENGINE cause the high cpu usage and how to fix it?Thank you. CPU utilization for five seconds: 99%/0%; one ...