JN0-649 Exam - Question 18

Question

Click the Exhibit button.

Remote branches connect to the corporate WAN through access switches. The access switches connect to access ports on the WAN distribution switch, as shown in the exhibit. L2PT has previously been configured on the tunnel Layer 2 traffic across the WAN. You decide to move the L2PT tunnel endpoints to the access switches. When you apply the L2PT configuration to the access switches, the ports that connect the access switches to the distribution switch shut down.

Which action would solve this problem?

Examice · Accepted Answer

The problem occurs because access interfaces shouldn't receive Layer 2 Protocol Tunneling (L2PT) messages. When you configure L2PT on the access switches and connect them to the distribution switch using access ports, L2PT packets are incorrectly processed, causing the interfaces to shut down to prevent loops. To resolve this, you should configure the links between the access switches and the distribution switch as trunk ports. This way, the switches can properly handle L2PT packets without shutting down the ports.

mohdema · Answer

Access interfaces in an L2PT-enabled VLAN should not receive L2PT-tunneled PDUs. If an access interface does receive L2PT-tunneled PDUs, there might be a loop in the network, and the device will shut down the interface.
https://www.juniper.net/documentation/us/en/software/junos/multicast-l2/topics/topic-map/layer-2-protocol-tunneling.html

penguin02007 · Answer

A is correct.

https://www.juniper.net/documentation/us/en/software/junos/multicast-l2/topics/topic-map/layer-2-protocol-tunneling.html#d116e87

harrypogi · Answer

a correct

JN0-649 Exam - Question 18

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