<div dir="ltr">Thanks Bjorn for the details, Have tried the option you have mentioned and thats when am getting POlicy mismatch error. I have to try the ModemManager to verify it.</div><div class="gmail_extra"> <div class="gmail_quote">On Wed, Feb 8, 2017 at 2:57 AM, Bjørn Mork <<a href="mailto:bjorn@mork.no" target="_blank">bjorn@mork.no</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Balaji Sivakumar <<a href="mailto:shivbalaji1985@gmail.com">shivbalaji1985@gmail.com</a>> writes: > Thanks Bjorn for the reply, I got the idea and it works for me well. > > Do you have any suggestions/ idea on creating dual stack connections on > single /dev/cdc-wdm device ? we are getting 'Policy Mismatch error'. I wonder if that is caused by trying to "convert" a single stack connection to dual stack? QMI is (or was? this might be fixed in newer versions?) weird wrt dual stack. There is no way to request an IPV4V6 context when connecting, since you can only specify a single family per connection request. But only the first connection request will actually create a network context. The second one, for the second family, will simply return the family specific data from the existing dual-stack connection. Or fail, if that connection is single stack. One way to make the first connection dual stack is to predefine a dual stack profile matching the APN. I don't think this is supported in qmicli yet, but you can use AT commands to do it: at+cgdcont=1,"IPV4V6", "yourapn" You should check your list of configured profiles first, to make sure you don't mess up a profile you want to keep and also make sure you don't have any other (single family) profile for the same APN. If you have then that might be selected instead and you end up with a single family connection. Then issue the two family specific connection requests referring to this apn: qmicli -d /dev/cdc-wdm0 --client-no-release-cid --wds-start-network=apn=yourapn,ip-type=4 qmicli -d /dev/cdc-wdm0 --client-no-release-cid --wds-start-network=apn=yourapn,ip-type=6 Don't know if this was what you already tried. It's been a long time since I did anything like this manually. ModemManager tends to DTRT nowadays, so I just lean on that. If you are still having problems then you should study what ModemManager does to initiate a dual stack connection. Bjørn </blockquote></div> </div>