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WirelessWLAN Config

no security wpa2

Disables WPA2 security on a WLAN, reverting to open or no security, typically used for troubleshooting or legacy device compatibility.

Syntax·WLAN Config
no security wpa2

When to Use This Command

  • Temporarily disabling WPA2 to test client connectivity issues without encryption overhead.
  • Configuring a guest WLAN with open access (no security) for public use.
  • Migrating from WPA2 to WPA3 security; disabling WPA2 as part of the transition.
  • Resetting a WLAN to no security before applying a different security policy.

Command Examples

Disable WPA2 on a WLAN

no security wpa2
WLAN ID: 1
WLAN Profile Name: Guest_Network
Security: Open

Line 1 shows the WLAN ID (1). Line 2 shows the profile name (Guest_Network). Line 3 confirms security is now Open (no WPA2).

Verify WPA2 is disabled

show wlan 1 security
WLAN ID: 1
Security: Open
WPA2: Disabled

Line 1 shows WLAN ID. Line 2 shows security mode is Open. Line 3 explicitly confirms WPA2 is Disabled.

Understanding the Output

The output of 'no security wpa2' is minimal; it only confirms the change if you run a subsequent show command. Use 'show wlan <id> security' to verify. Look for 'Security: Open' and 'WPA2: Disabled'. If you see 'WPA2: Enabled', the command did not take effect. Ensure you are in WLAN Config mode for the correct WLAN.

CCNA Exam Tips

1.

CCNA exam may test that 'no security wpa2' removes all WPA2 parameters, not just disables encryption.

2.

Remember that after disabling WPA2, the WLAN becomes open; clients can connect without authentication.

3.

The command must be issued in WLAN Config mode (config-wlan), not global config.

4.

Be aware that disabling WPA2 may violate corporate security policies; exam scenarios often test best practices.

Common Mistakes

Mistake 1 — Issuing 'no security wpa2' in global config mode instead of WLAN Config mode, resulting in 'Invalid input detected'.

Mistake 2 — Forgetting to specify the WLAN ID before entering WLAN Config mode, causing the command to affect the wrong WLAN.

Mistake 3 — Assuming disabling WPA2 automatically enables another security protocol; you must explicitly configure WPA3 or other security.

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