Anker USB ethernet does not DHCP

Message

grant123 · Post by **grant123** » Mon Sep 19, 2022 11:01 pm

I have several different USB ethernet adapters and all work fine to DHCP from my ISP except for the Anker adapters. They work fine when manually specifying an IP for the LAN connection but when they try to DHCP from my ISP they set an IPv4LL address instead which doesn't work. I have 2 of these

https://www.amazon.com/gp/product/B00NOP70EC

and 1 of these:

https://www.amazon.com/gp/product/B08CB1QNLT

and they all behave this way.

Post by **NeddySeagoon** » Tue Sep 20, 2022 12:54 pm

grant123,

What are the Vendor and Device IDs for these dongles. We need to know what is on the inside :)

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lsusb

should be enough.

dhcp messages are Ethernet packets, so it sounds a bit odd.

I wonder if you are hitting a timeout for some reason then your system gives up and helps itself to a link local address, which as you say is not useful.

grant123 · Post by **grant123** » Wed Sep 21, 2022 6:26 pm

Here's that info:

idVendor 0b95
idProduct 1790
bcdDevice 2.00

I'm using gentoo-kernel with default config.

I do see a lot of "Failed to read reg index" and "Failed to write reg index" messages associated with the adapter in dmesg.

Post by **NeddySeagoon** » Wed Sep 21, 2022 7:00 pm

grant123,

Those are AX88179 Gigabit Ethernet USB3 to Ethernet converters, like by router.

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pi_router ~ # lsusb
Bus 003 Device 002: ID 0b95:1790 ASIX Electronics Corp. AX88179 Gigabit Ethernet
Bus 002 Device 003: ID 0b95:1790 ASIX Electronics Corp. AX88179 Gigabit Ethernet
Bus 003 Device 003: ID 0b95:1790 ASIX Electronics Corp. AX88179 Gigabit Ethernet

They have a MaxPower 496mA, which is just 4mA under the USB2 root hub limit for all devices powered by the hub.

Please put the the output of

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lsusb -vvv

onto a pastebin, so that we can see your USB bus power arrangements.
Its possible that using different USB ports or a powered USB hub (to overcome the power limit) will fix it.

I would not be surprised to learn that the devices that work are USB2 to 100MBit/sec. I would expect them to use less power.
lsusb will show them as Fast Ethernet adaptors.

grant123 · Post by **grant123** » Wed Sep 21, 2022 7:27 pm

I'm using an Anker powered USB hub and the same USB port on it for the working adapters and for the Ankers. One of the working adapters is this one:

https://www.amazon.com/Plugable-Etherne ... B00AQM8586

Post by **NeddySeagoon** » Wed Sep 21, 2022 7:40 pm

grant123,

What is its Vendor and Device ID?
What does lsusb -vvv say about its MaxPower?

Your entire

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lsusb -vvv

will still be interesting

grant123 · Post by **grant123** » Wed Sep 21, 2022 11:22 pm

It looks like they're actually the same for the working adapter:

idVendor 0b95
idProduct 1790

MaxPower is 496mA. I'd prefer not to dump the entire lsusb -vvv in here but happy to pick out what you need.

Post by **NeddySeagoon** » Thu Sep 22, 2022 7:20 am

grant123,

All of

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lsusb -vvv

probably won't fit in a post, hence pastebin.
The output of

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lsusb.py

would do, if its still a thing.
It shows the device tree, the drivers and power requirements for every connected device.

That some devices work and some don't with the same Vendor and Device IDs does not rule out power.
Manufacturing tolerances mean that they are not all the same.
It does rule out USB quirks, since that uses Vendor and Device IDs for a lookup, to know which quirks to apply.

dmesg, showing the errors, on a pastebin would be good too.