mediumMultiple Select
300-410 Practice Question: Which TWO commands can be used to verify the…
Which TWO commands can be used to verify the operational status of a manually configured IPv6 tunnel on a Cisco IOS router? (Choose TWO.)
⚠ Common exam trap
Cisco often tests the distinction between configuration verification commands (like 'show running-config') and operational status commands (like 'show interfaces' and 'show ipv6 interface'), leading candidates to mistakenly choose 'show running-config interface tunnel 0' as a verification tool for operational status.
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
✓
show interfaces tunnel 0
Option A, `show interfaces tunnel 0`, is correct because it displays the operational state (up/up or down/down) of the tunnel interface, along with line protocol status, encapsulation type, and packet counters, directly verifying whether the manually configured tunnel is functioning. Option B, `show ipv6 interface tunnel 0`, is correct because it confirms the tunnel interface's IPv6 configuration and operational status, including the link-local address, global IPv6 address, and whether IPv6 is enabled and up on that interface. Option C, `show ipv6 route`, only displays the IPv6 routing table and does not confirm the tunnel interface's operational state. Option D, `show ipv6 tunnel 0`, is not a valid Cisco IOS command for verifying tunnel status. Option E, `show running-config interface tunnel 0`, only shows the configured commands in the running configuration and does not reflect the current operational status of the tunnel.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
show interfaces tunnel 0
Why this is correct
`show interfaces tunnel 0` reports line protocol and tunnel status, directly confirming whether the manually configured IPv6 tunnel is up or down. It satisfies the stem's requirement to verify operational status, exposing encapsulation, source, and destination details alongside interface counters.
- ✓
show ipv6 interface tunnel 0
Why this is correct
`show ipv6 interface tunnel 0` displays the tunnel interface's line and protocol status, plus its configured IPv6 address and link-local address. This directly satisfies the stem's requirement to verify operational status of the manually configured tunnel, confirming whether the interface is up and passing IPv6 traffic.
- ✗
show ipv6 route
Why it's wrong here
Show ipv6 route displays the resulting routing table, not tunnel interface line and protocol status, so a down tunnel may simply show no tunnel route. It is tempting because it confirms whether traffic forwards through the tunnel, which suits verifying end-to-end reachability after the tunnel is already up.
- ✗
show ipv6 tunnel 0
Why it's wrong here
Cisco IOS has no show ipv6 tunnel command; the parser rejects it, so it returns nothing useful. It is tempting because the syntax mirrors show ip tunnel used for older IPv4 tunnel types, which would verify those tunnels rather than manually configured IPv6 tunnels.
- ✗
show running-config interface tunnel 0
Why it's wrong here
Show running-config interface tunnel 0 displays configured parameters, not live line and protocol state, so it cannot confirm the tunnel is operational. It is tempting because it verifies encapsulation, source, and destination settings, which suits auditing configuration rather than checking current status.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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