IPv6 Tunnel

The WAP device supports the Intra-Site Automatic Tunnel Addressing Protocol (ISATAP). The ISATAP enables the WAP device to transmit IPv6 packets encapsulated within the IPv4 packets over the LAN. The protocol enables the WAP device to communicate with remote IPv6-capable hosts even when the LAN that connects them does not support the IPv6.

The WAP device acts as an ISATAP client. An ISATAP-enabled host or router must reside on the LAN. The IP address or host name of the router is configured on the WAP device (by default, it is ISATAP). If configured as a host name, the WAP device communicates with a DNS server to resolve the name into one or more ISATAP router addresses. The WAP device then sends solicit messages to the routers. When an ISATAP-enabled router replies with an advertisement message, the WAP device and the router establish the tunnel. The tunnel interface is assigned a link-local and a global IPv6 address, which serve as virtual IPv6 interfaces on the IPv4 network.

When IPv6 hosts initiate the communication with the WAP device connected through the ISATAP router, the IPv6 packets are encapsulated into IPv4 packets by the ISATAP router.

  • ISATAP Status — Check Enable to enable ISATAP on the device.

  • ISATAP Capable Host — Enter the IP address or DNS name of the ISATAP router. The default value is isatap.

  • ISATAP Query Interval — Enter how often the WAP device should send queries to the DNS server to attempt to resolve the ISATAP host name into an IP address. The valid range is 120 to 3600 seconds. The default value is 120 seconds.

  • ISATAP Solicitation Interval — Enter how often the WAP device should send the router solicitation messages to the ISATAP routers. The WAP device sends the router solicitation messages only when there is no active ISATAP router. The valid range is 120 to 3600 seconds. The default value is 120 seconds.

  • ISATAP IPv6 Link Local Address— The IPv6 address used by the local physical link. The link local address is not configurable and is assigned by using the IPv6 Neighbor Discovery process.

  • ISATAP IPv6 Global Address— If the WAP device has been assigned one or more IPv6 addresses automatically, the addresses are listed.

Note

When the tunnel is established, the ISATAP IPv6 Link Local Address and ISATAP IPv6 Global Address fields appear on the page. These are the virtual IPv6 interface addresses.

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