Cisco Cisco Packet Data Gateway (PDG)
FA Service Configuration Mode Commands
▀ reverse-tunnel
▄ Command Line Interface Reference, StarOS Release 16
4948
reverse-tunnel
Enables the use of reverse tunneling for a Mobile IP (MIP) sessions when requested by the mobile node (MN).
Product
PDSN
ASN-GW
GGSN
Privilege
Security Administrator, Administrator
Mode
Exec > Global Configuration > Context Configuration > FA Service Configuration
configure > context context_name > fa-service service_name
Entering the above command sequence results in the following prompt:
[context_name]host_name(config-fa-service)#
Syntax
[ no ] reverse-tunnel
no
Indicates the reverse tunnel option is to be disabled. When omitted, the reverse tunnel option is enabled.
Usage
Reverse tunneling involves tunneling datagrams originated by the MN to the HA via the FA service.
When an MN arrives at a foreign network, it listens for agent advertisements and selects an FA that supports
reverse tunnels. The MN requests this service when it registers through the selected FA. At this time, the MN
may also specify a delivery technique such as Direct or the Encapsulating Delivery Style.
The advantages of using reverse-tunneling:
When an MN arrives at a foreign network, it listens for agent advertisements and selects an FA that supports
reverse tunnels. The MN requests this service when it registers through the selected FA. At this time, the MN
may also specify a delivery technique such as Direct or the Encapsulating Delivery Style.
The advantages of using reverse-tunneling:
All datagrams from the mobile node seem to originate from its home network
The FA can keep track of the HA that the mobile node is registered to and tunnel all datagrams from the
mobile node to its HA
Use the
no
option of this command to disable reverse tunneling. If reverse tunneling is disabled, and the
mobile node does not request it, then triangular routing is used.
The system defaults to reverse tunnel enabled.
The system defaults to reverse tunnel enabled.
Important:
If reverse tunneling is disabled on the system and an MN requests it, the call will be rejected with a
reply code of 74H (reverse-tunneling unavailable).
Example
The following command disables reverse-tunneling support for the FA service:
no reverse-tunnel