Cisco CATALYST 2960

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Catalyst 2960 Switch Command Reference
78-16882-01
Chapter 2 Catalyst 2960 Switch Cisco IOS Commands
show spanning-tree
IST master *this switch
Operational hello time 2, forward delay 15, max age 20, max hops 20
Configured hello time 2, forward delay 15, max age 20, max hops 20
Interface role state cost prio type
-------------------- ---- ----- --------- ---- --------------------------------
GigabitEthernet0/1 root FWD 200000 128 P2P bound(STP)
GigabitEthernet0/2 desg FWD 200000 128 P2P bound(STP)
Port-channel1 desg FWD 200000 128 P2P bound(STP)
Related Commands Command Description
clear spanning-tree counters Clears the spanning-tree counters.
clear spanning-tree detected-protocols Restarts the protocol migration process.
spanning-tree backbonefast Enables the BackboneFast feature.
spanning-tree bpdufilter Prevents an interface from sending or receiving bridge
protocol data units (BPDUs).
spanning-tree bpduguard Puts an interface in the error-disabled state when it
receives a BPDU.
spanning-tree cost Sets the path cost for spanning-tree calculations.
spanning-tree extend system-id Enables the extended system ID feature.
spanning-tree guard Enables the root guard or the loop guard feature for all the
VLANs associated with the selected interface.
spanning-tree link-type Overrides the default link-type setting for rapid
spanning-tree transitions to the forwarding state.
spanning-tree loopguard default Prevents alternate or root ports from becoming the
designated port because of a failure that leads to a
unidirectional link.
spanning-tree mst configuration Enters multiple spanning-tree (MST) configuration mode
through which the MST region configuration occurs.
spanning-tree mst cost Sets the path cost for MST calculations.
spanning-tree mst forward-time Sets the forward-delay time for all MST instances.
spanning-tree mst hello-time Sets the interval between hello BPDUs sent by root switch
configuration messages.
spanning-tree mst max-age Sets the interval between messages that the spanning tree
receives from the root switch.
spanning-tree mst max-hops Sets the number of hops in an MST region before the
BPDU is discarded and the information held for an
interface is aged.
spanning-tree mst port-priority Configures an interface priority.
spanning-tree mst priority Configures the switch priority for the specified
spanning-tree instance.
spanning-tree mst root Configures the MST root switch priority and timers based
on the network diameter.
spanning-tree port-priority Configures an interface priority.
spanning-tree portfast (global
configuration)
Globally enables the BPDU filtering or the BPDU guard
feature on Port Fast-enabled interfaces or enables the Port
Fast feature on all nontrunking interfaces.