[support] [supprt] How do I get the CN address?

[Romain KUNTZ]

Hello,

On 2010/03/09, at 11:17, rohit gupta wrote:
> Scenario you are asking is that of route optimization.  we can maintain authorized CN's list in the configuration file of MR/MN and it updates in Home agent  the CN's address by appending a extension containing CN's address in the registration request. So that HA sends binding update messages to the CN's mentioned in the registration request during every time MR/MN registers. CN make direct tunnel to the POA instead of sending packets to Home Agent.

I'm not sure what protocol you mention here but this is not supported in UMIP. 
Route optimization can be enabled in the MR and CN configuration file (see mip6d.conf), and route optimization will automatically be triggered if some flow exists between the MR and the CN.

How to get the CN address is out of scope of MIPv6/NEMO. You can use a DNS and use a FQDN on your MR to contact the CN (similarly to what one usually does when contacting peers in the Internet) or directly use the CN IPv6 address on the MR.

Note that Route optimization only works for the traffic originated from the MR. Packets from the mobile network will not take the route-optimized path.

Cheers,
romain

>  
> -> another thing which could be done & is also a integral part of Mobile IPv6. That MR/MN picks up the CN's IP address from any running/establish session & update the CN's communicating with its current point-of-attachement whenever it changes its POA.
> 
> Regards,
> Rohit Gupta.
> 
> 
> On Tue, Mar 9, 2010 at 3:01 PM, tony chen <aoc90058 at gmail.com> wrote:
> hello! everyone!
> 
> 
> I am wirting a NEPL-like program, but I have a problem about communication between CN and MN.
> The following figure, Time1 and Time2, is the motion I consider.
> 
> Time1 :
> CN------HA---(Internet)--AR
>     │
> MR------┘
> 
> MR is under the home network, so MR use a home address in the home network to communicate with CN.
> 
> Time2 :
> CN------HA--(Internet)--AR
>             │
>             └--MR
> The MR do handover from home network to AR(foreign network), and MR gets a CoA in foreign network. At the time, MR must tell CN about MR's CoA, so CN can commucation directly with MR instead of transporting by HA.The quetion is how do I get CN's address and continue to communicate with CN.
> 
> Thanks everybody!
> 
> 
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