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Cisco STP Configuration and Verification Commands
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Cisco STP Configuration and Verification Commands
Cisco STP Configuration and Verification Commands
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1
Question
Which command displays general Spanning Tree information on a switch?
Answer
`show spanning-tree`
2
Question
Which command displays STP information for one VLAN?
Answer
`show spanning-tree vlan <vlan-id>`
3
Question
Which command displays STP information for one interface?
Answer
`show spanning-tree interface <interface>`
4
Question
Which command summarizes STP configuration and operational status?
Answer
`show spanning-tree summary`
5
Question
Which command displays root bridge information?
Answer
`show spanning-tree root`
6
Question
Which command displays detailed STP and BPDU information?
Answer
`show spanning-tree detail`
7
Question
Which command configures PVST+ as the STP mode?
Answer
`spanning-tree mode pvst`
8
Question
Which command configures Rapid PVST+ as the STP mode?
Answer
`spanning-tree mode rapid-pvst`
9
Question
How do you manually configure bridge priority for one VLAN?
Answer
`spanning-tree vlan <vlan-id> priority <value>`
10
Question
How do you make a switch the primary root bridge?
Answer
`spanning-tree vlan <vlan-id> root primary`
11
Question
How do you make a switch the secondary root bridge?
Answer
`spanning-tree vlan <vlan-id> root secondary`
12
Question
How do you configure STP path cost for all VLANs?
Answer
`interface <interface>` followed by `spanning-tree cost <value>`
13
Question
How do you configure STP path cost for one VLAN?
Answer
`interface <interface>` followed by `spanning-tree vlan <vlan-id> cost <value>`
14
Question
How do you configure STP port priority on an interface?
Answer
`interface <interface>` followed by `spanning-tree port-priority <value>`
15
Question
How do you configure port priority for one VLAN on a trunk?
Answer
`interface <interface>` followed by `spanning-tree vlan <vlan-id> port-priority <value>`
16
Question
How do you enable PortFast on one interface?
Answer
`interface <interface>` followed by `spanning-tree portfast`
17
Question
How do you enable PortFast by default on access ports?
Answer
`spanning-tree portfast default`
18
Question
How do you enable BPDU Guard on one interface?
Answer
`interface <interface>` followed by `spanning-tree bpduguard enable`
19
Question
How do you enable BPDU Guard by default on PortFast ports?
Answer
`spanning-tree portfast bpduguard default`
20
Question
How do you enable BPDU Filter on one interface?
Answer
`interface <interface>` followed by `spanning-tree bpdufilter enable`
21
Question
How do you enable BPDU Filter by default on PortFast ports?
Answer
`spanning-tree portfast bpdufilter default`
22
Question
How do you enable Root Guard on one interface?
Answer
`interface <interface>` followed by `spanning-tree guard root`
23
Question
How do you enable Loop Guard on one interface?
Answer
`interface <interface>` followed by `spanning-tree guard loop`
24
Question
How do you enable Loop Guard globally by default?
Answer
`spanning-tree loopguard default`
25
Question
How do you configure the STP hello time for one VLAN?
Answer
`spanning-tree vlan <vlan-id> hello-time <value>`
26
Question
How do you configure the STP forward delay for one VLAN?
Answer
`spanning-tree vlan <vlan-id> forward-time <value>`
27
Question
How do you configure maximum age for one VLAN?
Answer
`spanning-tree vlan <vlan-id> max-age <value>`
28
Question
Which command enables automatic BPDU Guard errdisable recovery?
Answer
`errdisable recovery cause bpduguard`
29
Question
Which command configures the errdisable recovery waiting interval?
Answer
`errdisable recovery interval <seconds>`