Preview Tool

Cisco Bug: CSCtb19339 - Vista: Can't establish tunnel with IPv6 disabled from registry

Last Modified

Mar 12, 2016

Products (1)

  • Cisco AnyConnect VPN Client

Known Affected Releases


Description (partial)


The user is presented with an error pop-up:
The VPN client was unable to successfully verify the IP forwarding table modifications. A VPN connection will not be established.


IPv6 is enabled for the client interface.
IPv6 is disabled from the registry on the client system, as per
Bug details contain sensitive information and therefore require a account to be viewed.

Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
  • Number of Related Support Cases
Bug information is viewable for customers and partners who have a service contract. Registered users can view up to 200 bugs per month without a service contract.