What global configuration command enables STP on a specific VLAN?

What command allows you to change the default priority on a switch for a specific VLAN?

What command invokes the macro to configure a Catalyst switch as the primary root?

What command invokes the marco on a Catalyst switch to set it as the secondary root?

What interface-level command configures the STP port cost of an interface?

What interface-level command configures the VLAN port cost of an interface?

What command is used to display the STP information for a spcific VLAN?

What command enables Multiple Spanning Tree (MST) on a switch?

What command configures the MST region name?

What command allows you to enter MST configuration submode to configure MST?

What command configures the MST configuration revision?

What command allows you to maps VLANs to MSTIs?

What command displays the current MST configuration on a switch?

What command shows the uncommitted MST configuration?

What commands either abort the MST configuration changes or save the MST configuration changes?

To about changes: abort

 

To save changes: end

What command displays MST protocol information for MSTIs that are configured on a switch?

What command displays the MST configuration on a switch?

What interface command enables or disables portfast on an interface?

What command enables portfast globally on a switch?

What interface configuration command sets a port to access mode, enables portfast, and disables negotiation of channeling and trunking?

Describe the use of UplinkFast.

UplinkFast provides fast convergence after a direct link faulure if one or more redundant L2 links exist. It defines interfaces in an uplink group on a per-VLAN basis. The uplink group provides an alternate path in case the currently forwarding link fails.

What command configures uplinkfast on a switch?

What global configuration command enables or disables BackboneFast on a Catalyst switch?

What command can be used to verify the configuration of BackboneFast on a Catalyst switch?

Describe how the BPDU Guard feature works.

BPDU Guard puts an interface configured for STP portfast in the err-disable state upon receipt of a BPDU. The administrator must manually re-enable the interface or set up a time-out interval beforehand. STP applies the BPDU Guard feature globally to all portfast configured interfaces but can also be enabled/disabled on a per-interface basis

What global configuration command enables or disables BPDU Guard on a Catalyst switch?

What global configuration command enables BPDU filtering on a Catalyst switch?

spanning-tree portfast bpdufilter default

How does BPDU filtering work if explicitly configured on an interface?

The switch does not sent BPDUs and drops all BPDUs it receives

What does a switch do if BPDU filtering is configured globally?

The switch changes the interface back to normal STP operation if the port receives BPDUs on the respective interface, and it immediately loses its portfast status

What happens on an interface if BPDU guard and BPDU filtering are both enabled?

BPDU guard has no effect, because BPDU filtering takes precedence over BPDU guard.

Describe the use of the Root Guard feature.

The Root Guard feature forces an interface to become a designated port, and prevent surrounding switches from becoming a root switch. If a superior BPDU is received on a root guard-enabled port, the port moves to a root-inconsistent STP state (equal to a listening state)

What interface configuration command enables or disables root guard on an access switch?

Describe the use of the Loop Guard feature.

With Loop Guard enabled, a switch does an additional check before transitioning to the STP forwarding state. If a switch stops receiving BPDUs on a non-designated port with the Loop Guard feature enabled, the switch places the port into the STP loop-inconsistent blocking state, instead of moving through the listening, learning, and forwarding states. 

What interface-level command enables Loop Guard on a Catalyst switch?

What global configuration command enables Loop Guard on a Catalyst switch

What is the preferred feature to use when preventing L2 unidirectional link failures on EtherChannels?

Aggressive mode UDLD disables a single port that is exhibiting problems, where Loop Guard blocks all interfaces on the EtherChannel. Also, aggressive mode UDLD is not dependent on STP, so it supports L3 links as well.

What command can be used to capture debug information into the logging buffer?

What command can be used to view the backbonefast or uplinkfast status and statistics?

What command can display the backplane utilization on a Catalyst 6500 switch?