GigabitEthernet 1/1 and 1/2?

Refer to the exhibit.

L3SW1 has a spanning-tree priority of 8192 set on VLANs 1, 300, and 301, and these

VLANs are configured on and trunked between all switches. Executing the command show

spanning-tree blockedports on L2SW5 results in:

L2SW5# show spanning-tree blockedports

Name Blocked Interfaces List

——————– ————————————

VLAN0001 Gi1/1

VLAN0300 Gi1/1

VLAN0301 Gi1/1

An additional VLAN, VLAN302, is defined on all switches and trunked between them.

VLAN302 access ports are set up on each of the switches and PLC#1, I/O#1, and the

PanelView are attached. You expect the new VLAN to be listed as blocked on interface

GigabitEthernet1/1 of L2SW5 but it is not. The three new devices are able to communicate

with each other.

After executing the same command on all switches you see this output on L2SW4:

L2SW4# show spanning-tree blockedports

Name Blocked Interfaces List

——————– ————————————

VLAN0001 Gi1/2

VLAN0300 Gi1/2

VLAN0301 Gi1/2

Why is VLAN302 forwarding on L2SW5 interface GigabitEthernet 1/1 and L2SW4 interface

GigabitEthernet 1/1 and 1/2?
A . VLAN302 is not configured in the VLAN database on L2SW5
B . VLAN302 is not in the allowed list on the L2SW5 interface GigabitEthernet1/1 trunk
C . L2SW4 is the spanning tree root for VLAN 302
D . The FO3 fiber-optic cable between L2SW4 and L2SW5 is damaged

View Answer

Answer: C