IPv6 support on Wireless AP and controllers
Ipv6 is currently not support on any of the Cisco AP's in autonomous mode. However, they will be able to pass ipv6 traffic. This feature is on the roadmap to be implemented in future, however, it not yet clear as to when it will be added.
Regarding ipv6 support on controllers, ipv6 is not supported on 2100 Series Controllers. However, 4400 Series WLC's and Lightweight AP's support ipv6 in a pass through mode. Pass through mode means that even though there will be no actual implementation of ipv6 on the controller, the WLC will be able to bridge the ipv6 packets from one connected device to the other.
Prior to WLC 6.0 release, IPv6 pass-thru is only supported but no L2 security can be enabled on IPv6 WLAN. With WLC 6.0 release, IPv6 pass-thru with Layer-2 security supported. Same WLAN can support both IPv4 and IPv6 clients. IPv6 pass-thru and IPv4 Webauth is also supported on same WLAN.
IPv6 is not supported with guest mobility anchor tunneling
In order to enable IPv6 on the WLC, check the IPv6 Enable check box on the WLAN SSID configuration under the WLAN > Edit page. Also, Ethernet Multicast Mode (EMM) is required to support IPv6. If you disable EMM, client devices that use IPv6 lose connectivity. In order to enable EMM, go to the Controller >General page and from the Ethernet Multicast Mode drop down menu, choose Unicast or Multicast. This enables multicast either in Unicast mode or Multicast mode. When multicast is enabled as multicast unicast, packets are replicated for each AP. This can be processor intensive, so use it with caution. Multicast enabled as multicast multicast uses the user assigned multicast address to do a more traditional multicast out to the access points (APs).
WLC release 6.0 onwards
- Same WLAN can support both IPv4 and IPv6 clients.
- IPv6 pass-thru and IPv4 Webauth is also supported on same WLAN.
- IPv6 is not supported with guest mobility anchor tunneling.