Tunnel Commands
Page 316
Command Mode
Interface Tunnel Configuration mode.
User Guidelines
•
The system can be enabled to an ISATAP tunnel. When enabled, an automatic tunnel interface is created on
each interface that is assigned with an IPv4 address.
On a specific interface (that is port/ VLAN), both native IPv6 and transition mechanisms can coexist. The
host implementation chooses the egress interface according to the scope of the destination IP address
(for example ISATAP/ Native IPv6).
Example
The following example configures an IPv6 transition mechanism global support mode.
tunnel isatap router
The tunnel isatap router Interface Tunnel Configuration mode command configures a global string that
represents a specific automatic tunnel router domain name. Use the no form of this command to remove the string
associated with the router domain name and return to the default.
Syntax
tunnel isatap router router_name
no tunnel isatap router
Parameters
•
router_name — A string representing the router’s domain name.
Default Configuration
By default, the ISATAP string represents the corresponding automatic tunnel router’s domain name.
Command Mode
Interface Tunnel Configuration mode.
User Guidelines
•
The ipv6 tunnel routers-dns command determines the string that the host uses for automatic tunnel router
lookup in an IPv4 DNS procedure. By default, the string ISATAP is used for the corresponding automatic
tunnel types.
• Per tunnel, only one string can represent the automatic tunnel router name. Using this command overwrites
the existing entry.
console(config)# interface tunnel 1
console(config-tunnel)# tunnel mode ipv6ip
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