Juniper JN0-664 Exam - Topic 5 Question 53 Discussion

Actual exam question for Juniper's JN0-664 exam

Question #: 53
Topic #: 5

[All JN0-664 Questions]

Exhibit

Which two statements about the output shown in the exhibit are correct? (Choose two.)

AThe PE is attached to a single local site.

BThe connection has not flapped since it was initiated.

CThere has been a VLAN ID mismatch.

DThe PE router has the capability to pop flow labels

Show Suggested Answer

Suggested Answer: A, B

The output is from the show l2vpn connections command on a Juniper router. This command is used to verify the status of Layer 2 VPN (L2VPN) pseudowires between Provider Edge (PE) routers.

Breakdown of Key Information:

Instance: vpn-A

This is the L2VPN instance being monitored.

Connection Status (St)

The connection status is 'Up', meaning the pseudowire is operational.

Local Site: CE1-2 (2)

The PE router is attached to a single local site (CE1-2).

Uptime & Connection Flaps

The output shows the last time the connection was up:

Time last up: Apr 11 14:35:27 2020

The '# Up trans' value is 1, meaning this connection has been established once and has not flapped since it was initiated.

VLAN ID Mismatch Check

The legend includes 'VM -- VLAN ID mismatch', but this status is not present in the connection output.

This means there is NO VLAN ID mismatch.

Flow Labels

The Flow Label Transmit is No, and the Flow Label Receive is No.

This means the PE router does NOT have the capability to pop flow labels.

by Titus at Aug 18, 2025, 10:33 AM

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Aide

2 months ago

Really? I didn't expect the PE to pop flow labels!

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Daniel

2 months ago

Wait, how do we know the connection hasn't flapped?

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Elli

2 months ago

I think there's a VLAN ID mismatch though.

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Kattie

3 months ago

The PE is attached to a single local site.

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Candida

3 months ago

Totally agree, that seems right!

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Lorean

3 months ago

I’m a bit confused about option A; I thought we covered scenarios where a PE could connect to multiple sites.

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Maybelle

4 months ago

I recall something about PE routers and flow labels, so option D might be correct, but I need to double-check that.

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Ashlee

4 months ago

I'm not entirely sure, but I feel like option C could be a common issue we discussed regarding VLANs.

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Edwin

4 months ago

I think option B sounds familiar; I remember something about connection stability in our practice questions.

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Jarod

4 months ago

This is right up my alley! I've dealt with similar issues before, so I'm confident I can identify the two correct statements about the output.

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Stephaine

4 months ago

Ugh, network troubleshooting is not my strong suit. But I'll give it a try and see if I can at least eliminate a couple of the options.

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Clorinda

5 months ago

Okay, I think I've got a handle on this. The key is to focus on the details provided in the output and match them up with the answer choices. I'll give it my best shot.

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Karrie

5 months ago

Hmm, I'm not too familiar with the specific terminology used in this output. I'll need to think through each option carefully and see if I can eliminate any incorrect answers.

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Aleshia

5 months ago

This looks like a pretty straightforward question about network connectivity. I'll carefully review the output and see if I can identify any clues about the connection status.

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