- Encapsulation:
(for your eyes only)
- How a message is
tunneled:
click here
- How a tunneled message is decapsulated: click here
Please read the notes on tunneling if you need a reciew.....
- How a message is
tunneled:
click here
-
Example:
- Suppose host (11.0.0.7)
sends an IP message
(maybe an TCP message) to the
mobile host
(10.0.0.4):
The message is routed (as usual) using the destination IP addr (10.0.0.4) towards the home network (10.0.0.xx)
- When the
home agent
receives the
IP packet:
- The virtual forwarding entry:
Dest | Output -------------+--------------- 10.0.0.4 | 12.0.0.1will cause the home agent to tunnel the IP packet to the foreign agent
Graphically:
- The virtual forwarding entry:
- When the
foreign agent
receives
the tunneled message:
- It's own IP address will cause the message to be de-capsulated
Graphically:
- New ::
- The
CareOf entry
in the Foreign agent will:
- Treat the host 10.0.0.4 as a node on its own network !!!
- Result:
- The
Foreign Agent
will
ARP
the host 10.0.0.4
to find its
physical (Ethernet/wireless) address
- And send the send the IP packet to (10.0.0.4) in a Ethernet/wireless frame
- The
Foreign Agent
will
ARP
the host 10.0.0.4
to find its
physical (Ethernet/wireless) address
Graphically:
- The
CareOf entry
in the Foreign agent will:
|
|