Re: zte mf691 connects but shows destination host unreachable

[Dan Williams <dcbw redhat com>]

On Fri, 2012-09-07 at 00:20 +0800, ding dong wrote:
> I am using zte mf691 with ubuntu 12.04 64bit edition. The modem is
> detected and upon connecting ip  address are assigning. But ping to
> any extenal host showing Destination Host Unreachable. WVDIAL is
> working fine. A similiar problem is reported here
> https://answers.launchpad.net/ubuntu/+source/gnome-nettool/+question/196096

It works fine with wvdial, because wvdial is using PPP.  This device is
an Icera-based ZTE modem with an emulated ethernet port, which provides
much higher speeds than PPP can.  Unfortunately, we need to handle these
devices specially via some udev rules, like the K3805z, and it requires
the latest version of ModemManager (either 0.6.0, or 0.5.4).

I'm not yet comfortable making the change upstream to have this modem
use DHCP instead of static addressing, because when I added support for
the MF691 (T-Mobile Rocket 2) long ago, I verified it was working with
static IP addressing.  I'd like to figure out what changed between that
version and the generic version, perhaps a firmware update or something.

In any case, the real fix here involves changes to both NM and
ModemManager, but for the time being you can make things work if you
have the latest ModemManager by modifying
the /lib/udev/rules.d/77-mm-zte-port-types.rules file and adding your
device near the bottom in a line like:

ATTRS{idProduct}=="1203", ENV{ID_MM_ZTE_ICERA_DHCP}="1"


Dan

> uname -a 
> Linux etuwa-pc 3.2.0-29-generic #46-Ubuntu SMP Fri Jul 27 17:03:23 UTC
> 2012 x86_64 x86_64 x86_64 GNU/Linux
> 
> lsb_release -a
> 
> No LSB modules are available.
> Distributor ID:    Ubuntu
> Description:    Ubuntu 12.04.1 LTS
> Release:    12.04
> Codename:    precise
> 
> 
> lsusb
> 
> Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
> Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
> Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching
> Hub
> Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching
> Hub
> Bus 001 Device 003: ID 138a:003c Validity Sensors, Inc. VFS471
> Fingerprint Reader
> Bus 002 Device 003: ID 0461:4dc7 Primax Electronics, Ltd 
> Bus 002 Device 004: ID 0cf3:3005 Atheros Communications, Inc. AR3011
> Bluetooth
> Bus 002 Device 010: ID 19d2:1203 ZTE WCDMA Technologies MSM 
> 
> 
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