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IPv6 Tunnel Commands
Cisco Sx350 Ph. 2.2.5 Devices - Command Line Interface Reference Guide
Parameters
•
isatap—(Optional) Specifies IPv6 automatic tunneling mode as ISATAP to
connect IPv6 nodes (hosts and routers) within IPv4 networks.
Default Configuration
IPv6 tunnel interfaces are not configured.
Command Mode
Interface (Tunnel) Configuration mode
User Guidelines
IPv6 tunneling consists of encapsulating IPv6 packets within IPv4 packets for
transmission across an IPv4 routing infrastructure.
The IPv6 interface is automatically enabled on a tunnel when it is configured as an
IPv6 tunnel by the tunnel mode ipv6ip command and the local IPv4 is defined by
the tunnel source command.
The IPv6 interface on an IPv6 tunnel is disabled if the tunnel stops to be an IPv6
tunnel or the tunnel local IPv4 address is removed and the new IPv4 cannot be
chosen.
ISATAP Tunnels
Using this command with the isatap keyword specifies an automatic ISATAP
tunnel. ISATAP tunnels enable transport of IPv6 packets within network
boundaries. ISATAP tunnels allow individual IPv4/IPv6 dual-stack hosts within a
site to connect to an IPv6 network using the IPv4 infrastructure.
ISATAP IPv6 addresses can use any initial Unicast /48 prefix. The final 64 bits are
an interface identifier. Of these, the leading 32 bits are the fixed pattern 0000:5EFE;
the last 32 bits carry the tunnel endpoint IPv4 address.
Only the ipv6 address eui-64 command can be used to configured a global unicast
IPv6 on an ISATAP tunnel.
Examples
Example 1—The following example configures an ISATAP tunnel:
switchxxxxxx(config)#
switchxxxxxx(config-if)#
switchxxxxxx(config-if)#
interface vlan 1
ip address 1.1.1.1 255.255.255.0
exit
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