This 350-501 practice question tests your understanding of services. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A service provider is implementing L2VPN using EoMPLS. The CE devices are connected to two different PE routers, and the PE routers are configured with xconnect under the attachment circuit. Which command is required on the PE routers to establish the pseudowire?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "which command"
Why it matters: Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
l2vpn xconnect context
Why wrong: This is a global configuration mode, not a command to specify the remote peer.
mpls l2transport route 10.1.1.2 100
This defines the peer IP and VC ID for the pseudowire.
neighbor 10.1.1.2 remote-as 100
Why wrong: This is BGP configuration, not L2VPN.
pseudowire 10.1.1.2 100 encapsulation mpls
Why wrong: Not a valid Cisco command for EoMPLS.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
mpls l2transport route 10.1.1.2 100
Option B is correct because the `mpls l2transport route` command is used under the xconnect configuration on a PE router to specify the remote PE's IP address and the VC ID for the pseudowire. This command establishes the MPLS L2VPN circuit by creating a targeted LDP session for label exchange, which is required for EoMPLS pseudowire setup.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
l2vpn xconnect context
Why it's wrong here
This is a global configuration mode, not a command to specify the remote peer.
mpls l2transport route 10.1.1.2 100
Why this is correct
This defines the peer IP and VC ID for the pseudowire.
Clue confirmation
The clue word "which command" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
neighbor 10.1.1.2 remote-as 100
Why it's wrong here
This is BGP configuration, not L2VPN.
pseudowire 10.1.1.2 100 encapsulation mpls
Why it's wrong here
Not a valid Cisco command for EoMPLS.
Common exam traps
Cisco often tests the distinction between BGP-based L2VPN (Option C) and MPLS L2VPN using targeted LDP (Option B), where candidates mistakenly apply BGP commands for a simple EoMPLS pseudowire that does not require BGP.
Trap categories for this question
Command / output trap
This is a global configuration mode, not a command to specify the remote peer.
Detailed technical explanation
The `mpls l2transport route` command triggers the PE to initiate a targeted LDP session with the remote PE to exchange pseudowire labels (PW label). The VC ID (100 in this case) must match on both PEs to form a single pseudowire; mismatched VC IDs will prevent the circuit from coming up. In real-world deployments, this command is often paired with `mpls l2transport vc` or `xconnect` under the interface, and the pseudowire status is verified with `show mpls l2transport vc`.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A network engineer at a university connects two campus buildings via a fibre link. Both routers run OSPF, but no adjacency forms — even though both routers can ping each other. The engineer finds one router is in area 0 and the other in area 1. OSPF adjacency requires matching area numbers, hello/dead timers, and network type. IP reachability alone is not enough.
What to study next
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Services — This question tests Services — Read the scenario before looking for a memorised answer..
The correct answer is: mpls l2transport route 10.1.1.2 100 — Option B is correct because the `mpls l2transport route` command is used under the xconnect configuration on a PE router to specify the remote PE's IP address and the VC ID for the pseudowire. This command establishes the MPLS L2VPN circuit by creating a targeted LDP session for label exchange, which is required for EoMPLS pseudowire setup.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Yes — watch for: "which command". Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 11, 2026
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