Did you change the port number on the RRC's web page? If you did, you need to append the URL with
a colon followed by the port number, i.e. 10.10.10.8:1234.
Otherwise, use the Microbit Setup Manager to search for the RRC's on the network. If they are there, then
it will find them. You can then click on the "browse" button to get on the web page.
Make sure that your two sets of RRC's use different port numbers, otherwise it won't work once installed.
If you want my networking checklist that walks you through the installation process, drop me a short mail
at dj0qn (at) darc.de and I will send it to you.
73,
Mitch DJ0QN / K7DX