4 ms·

I'm the owner of the modem. I've found about this a couple of months back when I moved the modem to its own vlan and noticed the broadcast frames. I did some re

I'm the owner of the modem. I've found about this a couple of months back when I moved the modem to its own vlan and noticed the broadcast frames. I did some research into the author of the poem on Twitter (https://twitter.com/riojot/status/1268821579724541954 https://twitter.com/riojot/status/1268821579724541954), but nothing fruitful. If anyone knows how the poem ended up in my modem, or even just what's ethertype 0x8300 all about, please comment!

tifan 6y ago
See my comment below :)
Randor 6y ago
Hmmmm, Looks like ethertype 0x8300 is covered in this Chinese patent titled "Access-network looped network monitoring method" https://patents.google.com/patent/CN102263658B/en https://patents.google.com/patent/CN102263658B/en Chinese version: https://patentimages.storage.googleapis.com/a3/f8/5e/8a9fcd4b702191/CN102263658B.pdf https://patentimages.storage.googleapis.com/a3/f8/5e/8a9fcd4...
- Jon_Lowtek 6y ago
  The type 8300 is not a registered standard and the patent includes a payload description: "mac, port-info, vlan-info" (yes some is redundant to the headers, that is explicitly mentioned) and that doesn't fit the data. Maybe "Huawei compatible" in the meaning of "can be understood by their devices, but not exactly as patented by them". If a ring with a second such device is formed, it might respond with a different poem.
  - Randor 6y ago
    Yeah, There are dozens of ether-types that are not standardized. There is also 0x8899 which is Realtek Remote Control Protocol (RRCP) https://en.wikipedia.org/wiki/Realtek_Remote_Control_Protocol https://en.wikipedia.org/wiki/Realtek_Remote_Control_Protoco... There are many more but I don't remember them off the top of my head. I probably need more coffee.