Cisco Catalyst 3650 - Page 117

System Health Monitoring
Other System Monitoring Considerations
109
Best Practice User Guide for the Catalyst 3850 and Catalyst 3650 Switch Series
Step 10 Use the show spanning-tree detail command to frequently check STP stability.
This command displays network stability information about the number of topology changes within each
VLAN, the last time a TCN was received, and so forth. Frequently monitoring this information is critical
to maintaining overall health of the switch and network.
show spanning-tree summary
Switch is in pvst mode
Root bridge for: VLAN0001, VLAN0011, VLAN0015, VLAN0100-VLAN0101
VLAN0881-VLAN0883
Extended system ID is enabled
Portfast Default is disabled
PortFast BPDU Guard Default is disabled
Portfast BPDU Filter Default is disabled
Loopguard Default is disabled
EtherChannel misconfig guard is enabled
UplinkFast is disabled
BackboneFast is disabled
Configured Pathcost method used is short
Name Blocking Listening Learning Forwarding STP Active
---------------------- -------- --------- -------- ---------- ----------
VLAN0001 0 0 0 2 2
VLAN0011 0 0 0 1 1
VLAN0015 0 0 0 1 1
VLAN0100 0 0 0 1 1
VLAN0101 0 0 0 1 1
VLAN0777 0 0 0 2 2
VLAN0881 0 0 0 1 1
Name Blocking Listening Learning Forwarding STP Active
---------------------- -------- --------- -------- ---------- ----------
VLAN0882 0 0 0 1 1
VLAN0883 0 0 0 1 1
---------------------- -------- --------- -------- ---------- ----------
9 vlans 0 0 0 11 11