If the native VLAN on a trunk is different on each end of the link, what is a potential consequence?
A.
The interface on both switches may shut down
B.
STP loops may occur
C.
The switch with the higher native VLAN may shut down
D.
The interface with the lower native VLAN may shut down
Explanation:
BD
Source: https://learningnetwork.cisco.com/docs/DOC-25797
http://www.cisco.com/c/en/us/support/docs/lan-switching/spanning-tree-protocol/24063-pvid-inconsistency-
24063.html
http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3850/software/release/3se/vlan/configuration_guide/b_vlan_3se_3850_cg/b_vlan_3se_3850_cg_chapter_0110.pdf
The link above says:
Make sure the native VLAN for an IEEE 802.1Q trunk is the same on both ends of the trunk link. If the native VLAN on one end of the trunk is different from the native VLAN on the other end, spanning-tree loops might result.
B is correct