Point to Point interface over qmi_wwan device

[Tang Nguyen]

--------------------------------------------
On Tue, 10/4/16, Dan Williams <dcbw at redhat.com> wrote:

 Subject: Re: Point to Point interface over qmi_wwan device
 To: "Tang Nguyen" <tang_nguyen at yahoo.com>, "Bjørn Mork" <bjorn at mork.no>
 Cc: "libqmi (development)" <libqmi-devel at lists.freedesktop.org>
 Date: Tuesday, October 4, 2016, 1:17 PM
 
 On Tue, 2016-10-04 at
 16:28 +0000, Tang Nguyen wrote:
 > Hi
 all,
 > I have tested /32 mask on wwan
 without running dhclient. but seems
 > not
 working .  The  packet connection successfully connected
 but it
 > would be dropped after a
 while.  Looks like Sierra firmware waits for
 > dhclient discovery request from host, and
 after a while it would
 > disconnect the
 data link.
 > My module is MC7354 (ATT)
 > What I did as below:
 >
 1. start network connection.  Verify connection status with
 command:
 > qmicli  -d /dev/cdc-wdm3
 --wds-get-packet-service-status2. Send AT
 > command to modem to show assigned IP
 address3. Using ip command to 
 >
 >Why use the AT command?  Why not:
 
 >qmicli -d /dev/cdc-wdm3
 >--wds-get-current-settings --client-no-release-
 >cid --client-cid=<cid from start
 >network>
 
 >I seem to
 >recall we've had devices before that didn't fully
 >set up the
 >WAN interface until they got
 >asked for the IP details, and I wouldn't
 >necessarily trust the AT interpreter to do the
 >same thing.  But the QMI
 >GetCurrentSettings
 >request might.
 
 >Dan
Thank you Dan.  I am running  libqmi v.10.2, so that command is not available - will try to update now
Tang


 
 > set ip address from step
 #2 for wwan interface4. Set default route to
 > wwan interface5.  Ping outside faild with
 error: "Destination Host
 >
 Unreachable"
 > Other running PPPd
 over serial USB port, is there any way we can
 > force cellular interface to be a
 point-to-point interface ?
 >
 ThanksTang 
 > 
 >
     On Saturday, October 1, 2016 1:11 PM, Tang Nguyen
 <tang_nguyen at ya
 > hoo.com> wrote:
 >
  
 > 
 >  Thank you
 Bjorn.  I will try to set it as your suggestion to see
 how
 > it works.
 > 
 > Our customer designs their network running
 out box as one of
 > gateway.  They
 don't want to advertise their network behind the box,
 > so they require cellular link as a point
 to point interface- not
 > sending
 broadcast.  It works well evdo modem, which is a PPP
 link
 > over cellular network.
 > Thanks again Bjone.
 >
 
 > Tang
 > 
 > Sent from my iPhone
 >
 
 > > 
 > > On Oct
 1, 2016, at 12:39 PM, Bjørn Mork <bjorn at mork.no>
 wrote:
 > > 
 > >
 Tang Nguyen <tang_nguyen at yahoo.com>
 writes:
 > > 
 > >
 > 
 > > > Hi,
 > > > I am working on the feature of
 setting a netmask of /32 for  wwan
 >
 > > network interface.  Usually, dhclient would get a
 /29 netmask 
 > > > from mini
 dhcpserver in modem.  The wwanX ethernet-line interface
 > > > and /29 netmask has affected to
 OSPF network design over LTE
 > > >
 modem.  We need to have a Point-to-Point interface and
 /32
 > > > netmask on wwan to solve
 this problem. 
 > > > I can open a
 PPP pver serial ttyUSB serial oport, but doing that
 > > > we loose the AT command port and
 too much PPP overhead. 
 > > > Can
 we have anyway to force wwanX to have  /32 netmask 
 over
 > > > libqmi - I intend to use
 "ip or ifconfig" command to change
 > > > netmask of wwan, but not sure it
 is the right way or not.  
 > > 
 > > Setting a /32 mask manually should
 not be a problem as long as you
 > >
 don't
 > > use DHCP.  You'll
 just have to configure routing manually too.  But
 > > since you are running OSPF, I guess
 that's not a problem.
 > > 
 > > I must admit I'm a bit curious
 about the OSPF part. Don't think it
 >
 > is
 > > very common to run routing
 protocols over LTE links.  But I cannot
 > > think
 > > of
 any reason why it shouldn't work. IS-IS won't work,
 though :)
 > > 
 >
 > 
 > > Bjørn
 >
 > 
 > >
 _______________________________________________
 > > libqmi-devel mailing list
 > > libqmi-devel at lists.freedesktop.org
 > > https://lists.freedesktop.org/mailman/listinfo/libqmi-devel
 > 
 >    
 >
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