Command Reference Guide Tunnel Configuration Command Set
61200510L1-35E Copyright © 2005 ADTRAN 1157
tunnel destination <ip address>
Use the tunnel destination command to specify the IP address to use as the destination address for all
packets transmitted on this interface. Use the no form of this command to clear the tunnel destination
address.
Syntax Description
<ip address> Specifies the IP address in dotted decimal notation to use as the destination
address for all packets transmitted on this interface (for example: 192.22.73.101).
Default Values
By default, no tunnel destinations are defined.
Applicable Platforms
This command applies to the NetVanta 300, 1000R, 2000, 3000, 4000, and 5000 and Total Access 900
Series units.
Command History
Release 9.1 Command was introduced.
Functional Notes
Until a tunnel interface has a destination IP addr ess defined, it is not operational.
The tunnel destination IP address will be the value put into the destination field of the outer IP header af ter
GRE encapsu lation of the original packet. A route must be defined for the destination address. Be certain
there are no recursive routes by ensuring that a tunnel’s destination address will be routed out a physical
interface. There is a possibility of creating a routing loop when tunnel interface traffic gets routed back to
the same tunne l interface or to ano ther tunnel in terface, which in tur n, does not have a route o ut a physical
interface. In either case, the tunnel will go down for a period of one minute, after which it will come back up
to determine if the recursive routes have been resolved. This allows time for routing protocols to converge
on a valid route. If a static route has caused the recursive routing loop, the tunnel status may oscillate until
the route is chang e d.
Usage Examples
The following example sets the tunnel destination IP address to 192.22.73.101:
(config)#interface tunnel 1
(config-tunnel 1)#tunnel destination 192.22.73.101