# No traffic on eth0 **URL:** \ **Category:** Legato Linux distribution (Yocto project)\ **Created:** [September 20, 2024, 1:33pm UTC](https://forum.legato.io/t/no-traffic-on-eth0/6796 "2024-09-20T13:33:02Z")\ **Posts on this page:** 13\ **Page:** 1
**Author:** ![liem.le](https://avatars.discourse-cdn.com/v4/letter/l/278dde/32.png) [@liem.le](https://forum.legato.io/u/liem.le)\ **Post date:** [September 20, 2024, 1:33pm UTC](https://forum.legato.io/t/no-traffic-on-eth0/6796/1 "2024-09-20T13:33:02Z")
I have a custom board with WP7608 connected directly to LAN7850 using HSIC lines. eth0 is working fine with R16.0.1 and R16.3, but not R17. No packet can be sent or received on eth0. If you have the similar issue, please provide some hints. Thanks. ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex019/user_avatar/forum.legato.io/jyijyi/32/822_2.png) [@jyijyi](https://forum.legato.io/u/jyijyi)\ **Post date:** [September 20, 2024, 2:05pm UTC](https://forum.legato.io/t/no-traffic-on-eth0/6796/2 "2024-09-20T14:05:18Z")
You can see here > [@Otg issue in R17, host mode does not work](https://forum.legato.io/t/otg-issue-in-r17-host-mode-does-not-work/6589/4): > > Isn’t USB OTG always a host? currently i cannot find any workaround to use USB OTG on R17 ---
**Author:** ![liem.le](https://avatars.discourse-cdn.com/v4/letter/l/278dde/32.png) [@liem.le](https://forum.legato.io/u/liem.le)\ **Post date:** [September 20, 2024, 3:02pm UTC](https://forum.legato.io/t/no-traffic-on-eth0/6796/3 "2024-09-20T15:02:52Z")
Currently i do not have cable connecting to USB connector (connected to USB lines and USB\_ID). does it make WP7608 not a host? Sorry for my lack of understanding on this topic. ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex019/user_avatar/forum.legato.io/jyijyi/32/822_2.png) [@jyijyi](https://forum.legato.io/u/jyijyi)\ **Post date:** [September 20, 2024, 3:38pm UTC](https://forum.legato.io/t/no-traffic-on-eth0/6796/4 "2024-09-20T15:38:55Z")
Didn’t you say old firmware has no problem? So i believe it is not hardware issue ---
**Author:** ![liem.le](https://avatars.discourse-cdn.com/v4/letter/l/278dde/32.png) [@liem.le](https://forum.legato.io/u/liem.le)\ **Post date:** [September 20, 2024, 3:54pm UTC](https://forum.legato.io/t/no-traffic-on-eth0/6796/5 "2024-09-20T15:54:27Z")
Correct. it is working fine with R16.0.1 and R16.3. I applied the patch in the thread you mentioned, but ping to eth0 still does not work. ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex019/user_avatar/forum.legato.io/jyijyi/32/822_2.png) [@jyijyi](https://forum.legato.io/u/jyijyi)\ **Post date:** [September 20, 2024, 4:09pm UTC](https://forum.legato.io/t/no-traffic-on-eth0/6796/6 "2024-09-20T16:09:09Z")
Then this is not hardware issue if it works in old firmware Have you tried the usb otg with thumb drive first? ---
**Author:** ![liem.le](https://avatars.discourse-cdn.com/v4/letter/l/278dde/32.png) [@liem.le](https://forum.legato.io/u/liem.le)\ **Post date:** [September 20, 2024, 4:25pm UTC](https://forum.legato.io/t/no-traffic-on-eth0/6796/7 "2024-09-20T16:25:08Z")
All i see is the message: [1904.010758] usb usb2: runtime PM trying to activate child device usb2 but parent (msm\_hsusb\_host) is not active I may not have a correct OTG adapter for microUSB. But i have question, my Ethernet controller is connected directly to HSIC pins, not the USB pins. The OTG is connected to the USB pins. How does this test related to my current problem? ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex019/user_avatar/forum.legato.io/jyijyi/32/822_2.png) [@jyijyi](https://forum.legato.io/u/jyijyi)\ **Post date:** [September 20, 2024, 4:47pm UTC](https://forum.legato.io/t/no-traffic-on-eth0/6796/8 "2024-09-20T16:47:03Z")
then i think it is not related as the patch is for enabling USB OTG functionality in FW R17. If you suspect the HSIC has problem, you can test in mangoh green and mangoh red board. The USB port is connected to HSIC pins. ---
**Author:** ![liem.le](https://avatars.discourse-cdn.com/v4/letter/l/278dde/32.png) [@liem.le](https://forum.legato.io/u/liem.le)\ **Post date:** [September 20, 2024, 5:08pm UTC](https://forum.legato.io/t/no-traffic-on-eth0/6796/9 "2024-09-20T17:08:37Z")
i do not have any mangoh board at this time. is there a way to confirm that the HSIC is fine in the filesystem? any logs should i need to know to confirm if it is ok? [dmesg-r17.log](https://forum.legato.io/uploads/short-url/tgwKQ9yjf9ztHCm4ozla82jC5Hf.log) (72.7 KB) ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex019/user_avatar/forum.legato.io/jyijyi/32/822_2.png) [@jyijyi](https://forum.legato.io/u/jyijyi)\ **Post date:** [September 20, 2024, 5:33pm UTC](https://forum.legato.io/t/no-traffic-on-eth0/6796/10 "2024-09-20T17:33:00Z")
then is it ok to connect the HSIC to USB thumb drive? ---
**Author:** ![liem.le](https://avatars.discourse-cdn.com/v4/letter/l/278dde/32.png) [@liem.le](https://forum.legato.io/u/liem.le)\ **Post date:** [September 20, 2024, 5:47pm UTC](https://forum.legato.io/t/no-traffic-on-eth0/6796/11 "2024-09-20T17:47:29Z")
i do not think so. the HSIC is connected directly to LAN7850 and then to the Ethernet connector ---
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex019/user_avatar/forum.legato.io/jyijyi/32/822_2.png) [@jyijyi](https://forum.legato.io/u/jyijyi)\ **Post date:** [September 20, 2024, 6:06pm UTC](https://forum.legato.io/t/no-traffic-on-eth0/6796/12 "2024-09-20T18:06:06Z")
then i have no idea if you don’t want to do hardware debugging good luck! ---
**Author:** ![liem.le](https://avatars.discourse-cdn.com/v4/letter/l/278dde/32.png) [@liem.le](https://forum.legato.io/u/liem.le)\ **Post date:** [September 20, 2024, 6:15pm UTC](https://forum.legato.io/t/no-traffic-on-eth0/6796/13 "2024-09-20T18:15:59Z")
Thanks. i will try to get a MangoH board and try