Layer 2 Traffic Tunneling (Q-in-Q, L2PT) JN0-650 Practice Questions (Page 4)

Questions 16–18

1. 16application · medium

   A network administrator is troubleshooting why customer STP BPDUs are not being forwarded across a provider network that has L2PT enabled. The provider edge interfaces are configured with the default L2PT settings. Which action is most likely to resolve the issue?

   • AConfigure the provider edge interfaces as trunk ports with the customer VLAN allowed.
   • BEnable L2PT for the specific protocol (e.g., STP) on the ingress and egress interfaces.
   • CDisable spanning tree on the provider edge interfaces.
   • DIncrease the MTU on the provider core interfaces to accommodate larger frames.
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2. 17expert · hard

   A network administrator is troubleshooting an issue where customer LLDP frames are not being tunneled across a provider network that has L2PT enabled for LLDP. The provider edge interfaces are correctly configured. However, the customer's LLDP frames are being processed by the provider's LLDP, causing incorrect neighbor information. What is the most likely cause?

   • AThe provider edge interfaces are not configured with the l2pt-protocol lldp statement.
   • BThe provider's LLDP is enabled globally, overriding the L2PT configuration.
   • CThe provider's LLDP timers are set too low, causing it to send its own LLDP frames before the customer's are tunneled.
   • DThe customer's LLDP frames are being sent with a destination MAC address that is not recognized by L2PT.
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3. 18foundation · easy

   Which Layer 2 protocol is commonly tunneled using L2PT?

   • ABGP
   • BSTP
   • CICMP
   • DOSPF
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