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Configure the ISATAP Tunnel

Configuration Conditions

Before configuring the ISATAP tunnel, complete the following tasks:

  • Configure the IP address of the physical interface, making the neighboring nodes reachable at the network layer.
  • Create one tunnel interface, and configure the basic parameters (refer to the configuration manual of the tunnel interface).
  • Configure any unicast routing protocol, making the route at the two ends of the tunnel reachable.

Configure the ISATAP Tunnel

Table 11-5 Configure the ISATAP tunnel

Step

Command

Description

Enter the global configuration mode

configure terminal

-

Enter the tunnel configuration mode

interface tunnel tunnel-number

-

Configure the tunnel interface address interface address

Configure IPv6 global unicast address or anycast address or the local address of the site or auto get address

ipv6 address { ipv6-address/prefix-length [ anycast | eui-64 ] | autoconfig }

Mandatory

By default, do not configure the IPv6 address on the tunnel interface.

Configure the local address of the IPv6 link

ipv6 address ipv6-address link-local

Optional

By default, after enabling IPv6 on the interface, automatically generate the local address of the link.

Configure the tunnel interface mode as the IPv4 compatible IPv6 auto tunnel

tunnel mode ipv6ip isatap

Mandatory

By default, the tunnel interface mode is GRE over IPv4.

Configure the source address or interface name of the tunnel interface

tunnel source { ip-address | interface-name }

Mandatory

By default, do not configure the source address or interface name on the tunnel interface.

note


  • It is not necessary to configure the destination address for the 6to4 tunnel. The destination address used during tunnel encapsulation is automatically got from the imbedded IPv4 address in the 6to4 tunnel IPv6 address.
  • If adopting the interface mode when configuring the tunnel source, the source address of the tunnel is the master address of the source interface.
  • The two ends of the tunnel should be configured as the same tunnel mode. Otherwise, transmitting via the tunnel fails.
  • On one device, you cannot configure multiple ISATAP tunnels with the same source address at the same time.