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<p class="MsoNormal"><span style="font-size:11.0pt">Hi<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">I am struggling with the following configuration on my
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">I have a Beaglebone running libqmi, Debian Jessie and dhclient to bring up the cdc-wdm0 device .<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">I am using libqmi 1.16 <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">It all worked perfectly and the wwan0 is giving me a great throughput.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">I have spent around 3 days on this issue exploring DNS/ARP/DHCLIENT and various options. Reached a brick wall<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">I am now trying to bring up the eth1 interface (as a dongle).<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">I have read an unfortunate note from Nimbelink regarding this issue where they say:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">“A QMI connection requires that any existing Ethernet connection be taken down. This is required so that the DHCP client serving the cellular link can correctly configure the system gateway and DNS resolver.
“<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><a href="http://nimbelink.com/Documentation/Development_Kits/NL-SWDK/30052_NL-SWDK_SkywireQMIAppNote.pdf">http://nimbelink.com/Documentation/Development_Kits/NL-SWDK/30052_NL-SWDK_SkywireQMIAppNote.pdf</a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">And unfortunately as soon as (around 5 seconds after ) I restart the eth1 interface, the system loses track of arp tables, so that the arp table goes from<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">(working)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">arp-v<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Address HWtype HWaddress Flags Mask Iface<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">233.sub-166-250-218.myv ether 02:50:f3:00:00:00 C wwan0<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Entries: 1 Skipped: 0 Found: 1<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">To<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">>arp -v<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Address HWtype HWaddress Flags Mask Iface<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">233.sub-166-250-218.myv ether 02:50:f3:00:00:00 C wwan0<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">192.168.0.2 ether 00:04:4b:5a:be:f6 C eth1<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">which works for about 5-10 seconds<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">and then degrades to:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">>arp -a<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">? (166.250.218.233) at 02:50:f3:00:00:00 [ether] on wwan0<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">? (192.168.0.2) at 00:04:4b:5a:be:f6 [ether] on eth1<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">and then rapidly degrades to a DELAY in the arp entry and then FAILED.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">And the ping google.com, DNS resolution etc all fails completely.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">I do not use modem manager or network manager – just the simple /etc/network/interfaces with eth1 configured as static.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Is there any fix /workround to this.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">I saw that ip tables might have some solution /idea to separating the icmp or arp packets out so that the interfaces are separate.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">My aim is to have the eth1 as hotspot connected to the 4G but I can’t even get to stage 1!<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Many thanks <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:7.5pt;font-family:Arial;color:black;mso-fareast-language:EN-GB">Mark Wyllie<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
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