Quiz Entry - updated: 2026.07.14
What commands do you use to verify EtherChannel status on a Cisco switch?
show etherchannel summary is the most useful — it shows all channels, their protocols, and port status at a glance.
Key verification commands:
| Command | What It Shows |
|---|---|
show interfaces port-channel |
General status of the port channel interface (up/down, bandwidth, errors) |
show etherchannel summary |
One-line summary per channel: group number, protocol, port status flags |
show etherchannel port-channel |
Detailed info about a specific port channel |
show interfaces etherchannel |
Role information about individual member interfaces |
Reading show etherchannel summary flags:
- D = Down, P = Bundled in port-channel
- I = Stand-alone, s = Suspended
- U = In use, S = Layer2
- R = Layer3
Example output:
Group Port-channel Protocol Ports
1 Po1(SU) PAgP Fa0/1(P) Fa0/2(P)
This shows channel-group 1, Port-channel 1 is up (SU = Layer2, in Use), using PAgP (Port Aggregation Protocol), with both Fa0/1 and Fa0/2 bundled (P).
Go deeper:
Troubleshoot EtherChannel: show etherchannel summary (Study-CCNP) — flag interpretation (D/U/S/R/P, I/H/s) plus port-channel and LACP/PAgP counters.- EtherChannel Configuration (Network Direction) —
show etherchannel summary, load-balance and port-channel commands.