350-401 question 32: Refer to the exhibit. An engineer needs to establish connectivity b…

Q27Network Assurance

Refer to the exhibit. An engineer needs to establish connectivity between a campus aggregation layer and a branch office access layer. The engineer uses Dynamic Trunking Protocol to create this connection; however, VLAN 1 management traffic is not passing. Which action fixes the issue and permits communication for all configured VLANs?

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After taking so many Cisco exams, you subconsciously get trained to think the most obvious answer is not correct because Cisco will throw in 14 double negatives and random words to throw you off.

D 2

Selected Answer: D D is correct

D 2

Selected Answer: D sw1(config-if)#switchport trunk native vlan 122 sw1(config-if)# Dec 21 21:37:35.737: %CDP-4-NATIVE_VLAN_MISMATCH: Native VLAN mismatch discovered on Ethernet0/1 (122), with sw2 Ethernet0/1 (1). Dec 21 21:37:35.738: %CDP-4-NATIVE_VLAN_MISMATCH: Native VLAN mismatch discovered on Ethernet0/3 (122), with sw2 Ethernet0/3 (1). sw1(config-if)# Dec 21 21:38:35.744: %CDP-4-NATIVE_VLAN_MISMATCH: Native VLAN mismatch discovered on Ethernet0/3 (122), with sw2 Ethernet0/3 (1). Dec 21 21:38:35.744: %CDP-4-NATIVE_VLAN_MISMATCH: Native VLAN mismatch discovered on Ethernet0/1 (122), with sw2 Ethernet0/1 (1). sw1(config-if)#do show interfaces po2 swi | i Native Trunking Native Mode VLAN: 122 (VLAN0122) <<<<<<<<<<<<<<<<<<<<< Administrative Native VLAN tagging: enabled Administrative private-vlan trunk Native VLAN tagging: enabled sw1(config-if)#

far-end: sw2#show interfaces po2 swi | i Native Trunking Native Mode VLAN: 1 (default) <<<<<<<<<<<<<<<<<<<<< Administrative Native VLAN tagging: enabled Administrative private-vlan trunk Native VLAN tagging: enabled sw2# sw2# sw2# *Dec 21 21:39:35.745: %CDP-4-NATIVE_VLAN_MISMATCH: Native VLAN mismatch discovered on Ethernet0/1 (1), with sw1.local.lab Ethernet0/1 (122). *Dec 21 21:39:35.745: %CDP-4-NATIVE_VLAN_MISMATCH: Native VLAN mismatch discovered on Ethernet0/3 (1), with sw1.local.lab Ethernet0/3 (122). sw2#

Cisco exams are more like English literature exams meant for Hoodini

D 1

Selected Answer: D The error message points to a native VLAN mismatch between SW1 and SW2 on the trunk link. Because VLAN 1 is the default native VLAN on Cisco devices, and the far end (SW1) is set to use VLAN 30 as the native VLAN, this mismatch can stop management traffic from passing. To fix the issue and allow communication for all configured VLANs, the best action is: C. Configure the correct native VLAN on the remote interface. By making sure both ends of the trunk link use the same native VLAN, you resolve the mismatch and allow management traffic to flow as expected.