DHCP example

Question

Hi, We’re evaluating the W6100 and were able to integrate the io6Library (GitHub - Wiznet/io6Library: io6Library is the integrated library for dual TCP/IP statck contorller such as W6100.) and loopback example (GitHub - WIZnet-ioLibrary/W6100EVB-Loopback: The Loopback Example for W6100 using io6Library) on a Cortex-M4-based development board. This example works using static IP addresses, but we’d like to see an example using DHCP. We’ve implemented the auto-configuration example (GitHub - WIZnet-ioLibrary/W6100EVB-AddressAutoConfiguration: The AddressAutoConfiguration Example for W6100 using io6Library), but there is no documentation explaining how it works or how to interpret what’s happening. The example compiles and runs, and this is outputted to stdout (from printf): Duplicate_Address_Detection Wait RQIR… Timeout !!! DAD SUCCESSED flags = 0x80 Address_Auto_Configuration Start getICMP6BLKR() = 0x4 getSn_PROTOR(7) = 0x3a Sn_SR : 33 getSLRTR() = 0xfa0 getSLRCR() = 0x0 getSLCR() = 0x0 getSLIR() = 0x0 Wait SLIR… getSLIR() = 0x80 getSn_RX_RSR(7) = 0x1a size : 4 recvfrom IP : (IPv6 address from a router on our network)

lawrence · Answer

Hello, @derrick The example’ follows W6100 DAD commands to set W6100’ IPv6 address. (you can get more info, what DAD is, from here, IPv6- Duplicate Address Detection (DAD) | by Geeky much! | Networks & Security | Medium) In datasheet, 6.6.5 DAD(Duplicated Address Detection) discribes DAD commands W6100 supports, https://docs.wiznet.io/img/products/w6100/w6100_ds_v104k.pdf Could you check this docs once ? And if you get more info and work follow, please let me know explain the details. Thank you.

lawrence · Answer

Hi @derrick This is basic IPv6 DHCP github.com io6Library/Internet/DHCP6 at master · Wiznet/io6Library master/Internet/DHCP6 io6Library is the integrated library for dual TCP/IP statck contorller such as W6100. You can run this code on your existing project. Thank you