Consider the following output from the show interfaces trunk command:
Which two of the following statements can be confirmed regarding the trunking configuration on the switch? (Choose two.)
A. VLAN 44 is allowed on the trunk.
B. VLAN 46 is not allowed on the trunk.
C. VLAN 45 is configured for the VTP domain.
D. VLAN 41 is not configured for the VTP domain.
E. VLAN 43 is pruned or is not in the spanning-tree forwarding state.
F. VLAN 41 is not pruned.
Correct Answer: DE
Explanation/Reference:
Answer:
Virtual local area network (VLAN) 41 is not configured for the VLAN Trunking Protocol (VTP) domain, and VLAN 43 is pruned or is not in the spanning-tree forwarding state. The show interfaces trunk command can be used to determine which VLANs are allowed, which VLANs are configured for the VTP domain, and which VLANs are in the spanning-tree forwarding state and are not pruned.
The VLANs listed under the Vlans allowed on trunk section are allowed on the trunk. Therefore, VLANs 1 through 43 and 45 through 4094 are allowed on the trunk. VLAN 44 is not allowed on the trunk; VLAN 46 is allowed on the trunk.
The VLANs listed under the Vlans allowed and active in management domain section are allowed on the trunk and configured for the VTP domain. In this scenario, this section includes VLANs 1 through 17, VLAN 40, VLAN 43, and VLANs 101 through 172. Because VLANs 41 and 45 are allowed on the trunk, but are not listed under the Vlans allowed and active in management domain section, VLANs 41 and 45 must not be configured for the VTP domain. VLANs 18 through 43, VLANs 45 through 100, and VLANs 173 through 4094 are not configured for the VTP domain.
VLANs 1 through 12, VLAN 16, VLAN 40, and VLANs 101 through 172 are listed under the Vlans in spanning tree forwarding state and not pruned section. Because VLAN 43 is allowed and is in the spanning-tree forwarding state, but is not listed under the Vlans in spanning tree forwarding state and not pruned section, VLAN 43 must be pruned or must not be in the spanning-tree forwarding state. This is also true of VLANs 13 through 15 and VLAN 17. As stated previously,
VLAN 41 is allowed on the trunk but is not configured for the VTP domain. Therefore, it cannot be confirmed whether VLAN 41 has or has not been pruned manually. If VLAN 41 were in the spanning-tree forwarding state, but were not listed under the Vlans in spanning tree forwarding state and not pruned section, then it could be confirmed that VLAN 41 were being pruned.
Objective:
Layer 2 Technologies Sub-Objective:
Configure and verify trunking
References:
Cisco > Cisco IOS Interface and Hardware Component Command Reference > show hw-module slot tech-support through show interfaces vg-anylan > show interfaces trunk
