Preview Tool

Cisco Bug: CSCvs35327 - Simplified/compressed/shortened IPv6 address with double colon (::) is not working on AnyConnect

Last Modified

Oct 06, 2020

Products (1)

  • Cisco AnyConnect Secure Mobility Client

Known Affected Releases


Description (partial)

When attempting to establish a VPN session to an IPv6 VPN gateway using a shortened IPv6 address with double colon (::) to connect, AnyConnect Client fails with the following error:

"The VPN connection failed due to an unexpected internal error encountered by the VPN client"

Windows, Linux and MacOs Anyconnect clients are affected.

Shortened representation of the IPv6 address used to connect to the gateway (:: on it),  for instance XXXX::XXXX:XXXX:XXXX
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.