On 12/1/09 2:32 PM, "Behcet Sarikaya" <[email protected]> wrote:
>>
>> We do not initiate tunnels from MAG to CGN. The gateway in the Gateway
>> initiated DS lite is not the first hop router, such as MAG, but a
>> router at the end of the mobility tunnel. We also dont initiate tunnels
>> from UE. And we dont require the CGN collocation with LMA, as we want
>> to support IPv6 core.
>
> As I said above, the gateway is not MAG, it is AR/GGSN/PGW or LMA.
> In -01 draft we also removed CGN or AFTR colocation with LMA.
>
You can make any changes you want in each of your iterations. But, if the
tunnel is initiated from the UE or MAG, and if CGN is not collocated, how
will the home agent see these IPv4 packets sent in a tunnel, or apply QoS or
other policies ? Where will the UE set up the tunnel to CGN or to HA ?
> But I am curious about tunnel initiation for the UE.
> Can you clarify that?
>
> Tunnel initiated by LMA, would it work for PMIPv6? Maybe it is an allowed
> feature, but restrict the operation into that specific choice?
>
No, it will work. We always initiate the CGN tunnel from LMA/HA/PDN GW/GGSN.
> I don't think it would work for GTP but I am not sure.
>
>>
>> We focus on the tunnel stitch and with requiring no changes to UE, or to
>> the access architecture.
>>
>>
>>
>>> The other observation I have is that there are merits in the access
>>> mode of DS-Lite. Access mode of DS-Lite matches well with DSMIPv6 where
>>> the host has exactly the same functionality of encapsulating v4 in v6.
>>> This is explained as DSMIPv6 mobility solution in Section 4 of the above
>>> draft.
>>>
>>
>>
>> It will add the extra tunnel over ahead and requires host changes for
>> supporting UE initiated mode. Instead we use the access tunnel and
>> stitch it with the CGN tunnel.
>
> Again, as I said above, DSMIPv6 UE already supports tunneling to HA and then
> you can stich it to AFTR.
>
Great. That's what I mean when I say tunnel stitching of mobility and CGN
tunnels.
> So previously called host based now is access mode I think has some uses.
>
You need DS-lite client on the UE. Like I said, we dont plan to change
access architecture.
Sri
> Regards,
>
> Behcet
>
>
>
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