Huawei/Vodafone K5160 in MBIM-mode, problems with dualstack

[Dan Williams]

On Tue, 2016-06-14 at 21:42 +0200, Thomas Schäfer wrote:
> Hi,
> 
> the good news first. The modem works under linux in both modes
> (cdc_ether and 
> mbim).
> 
> cdc-ether-mode works well in dualstack too without special treatment.
> 
> I have some problem with dualstack in mbim-mode.
> Using just the Networkmanager it only uses ipv4. If I use the
> ModemMananger 
> manually with dhclient(and slaac) afterwards, I get dualstack
> working. 
> 
> But the ModemManager doesn't know about it:
> 
> mmcli -b
> 3                                                                    
>                                                                      
>   
> Bearer '/org/freedesktop/ModemManager1/Bearer/3'
>   -------------------------
>   Status             |   connected: 'yes'
>                      |   suspended: 'no'
>                      |   interface: 'wwan0'
>                      |  IP timeout: '20'
>   -------------------------
>   Properties         |         apn: 'internet.telekom'
>                      |     roaming: 'allowed'
>                      |     IP type: 'ipv4v6'
>                      |        user: 'none'
>                      |    password: 'none'
>                      |      number: 'none'
>                      | Rm protocol: 'unknown'
>   -------------------------
>   IPv4 configuration |   method: 'static'
>                      |  address: '10.24.226.116'
>                      |   prefix: '29'
>                      |  gateway: '10.24.226.113'
>                      |      DNS: '10.74.210.210', '10.74.210.211'
>                      |      MTU: '1500'
>   -------------------------
>   IPv6 configuration |   method: 'unknown'
>   -------------------------
>   Stats              |          Duration: '539'
>                      |    Bytes received: 'N/A'
>                      | Bytes transmitted: 'N/A'
> 
> 
> 
> On the other hand, when using an older mbim-modem (K5150) it works. I
> tested 
> with master of libmbim and master modemmanager.
> 
> Any ideas where I should continue to search?

As always when there are questions, MM debug logs are usually necessary
:)  We're looking for the lines like "IPv4 configuration available:
xxx" and "IPv6 configuration available: xxx" and stuff around those.

Dan