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Cisco Bug: CSCvu19104 - 9800 sometimes redirect to internal portal instead of external for dual-stack clients

Last Modified

Jun 22, 2020

Products (1)

  • Cisco Catalyst 9800 Series Wireless Controllers

Known Affected Releases

16.12.3 17.2.1

Description (partial)

When configuring External webauth, sometimes some clients will show the internal WLC webauth portal
It can also cause the corruption of the custom web page (instead of aup.html loaded within the <iframe> tag, another login.html page will be loaded)
Some picture files also may not load. In this case, inspect element > console on browser will not show anything.

9800 external web authentication
This happens when the clients sends a HTTP packet in ipv6, then the 9800 will redirect to the internal portal if no portal ipv6 is configured in the webauth parameter map
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
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