Question 625 of 1,420
mediumMultiple ChoiceObjective-mapped
350-401 Practice Question: Runs the following command on Switch SW1: SW1#…
A network engineer runs the following command on Switch SW1:
SW1# show etherchannel summary
Flags: D - down P - bundled in port-channel I - stand-alone s - suspended H - Hot-standby (LACP only) R - Layer3 S - Layer2 U - in use N - not in use, no aggregation f - failed to allocate aggregator
M - not in use, minimum links not met u - unsuitable for bundling w - waiting to be aggregated d - default port
Number of channel-groups in use: 1 Number of aggregators: 1
Group Port-channel Protocol Ports ------+-------------+-----------+-------------------------------------------- 1 Po1(SU) LACP Gi0/1(P) Gi0/2(P) Gi0/3(D)
Based on this output, what can be concluded?
⚠ Common exam trap
Cisco often tests the interpretation of the 'show etherchannel summary' flags, where candidates mistakenly assume a port listed in the output is active, ignoring the specific flag character (e.g., 'D' vs 'P').
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The EtherChannel has two active member links.
The output shows that Gi0/1 and Gi0/2 have a flag of 'P' (bundled in port-channel), while Gi0/3 has a flag of 'D' (down). Therefore, only two ports are actively bundled, making option D correct. The 'SU' flags on Po1 indicate the port-channel is Layer 2 (S) and in use (U), not Layer 3.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The EtherChannel is using PAgP.
Why it's wrong here
The protocol is shown as LACP.
- ✗
Port Gi0/3 is bundled in the channel.
Why it's wrong here
Gi0/3 has flag D (down), not P (bundled).
- ✗
The port-channel is a Layer 3 interface.
Why it's wrong here
The flag 'S' indicates Layer 2.
- ✓
The EtherChannel has two active member links.
Why this is correct
Gi0/1 and Gi0/2 are marked P (bundled), so two links are active.
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Last reviewed: Jun 24, 2026
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