OpenWrt doesn't care whether it's RJ-45 or SFP; it's the same driver interacting with the same NIC. If you have a cartridge compatible with the port, the connection will be operational.
And over a year later I find this thread. I am running into the same problem that âUltraschorschâ had with not being able to connect to the internet to download and install the OpenWrt.
I have a XG 115w that came with Pfsense 2.7.2 installed on it. I was able to get it working and updated to 2.8.1 and it seems to be working just fine but I think it is a bit overkill for my home.
Are the steps listed above still valid with the latest version of OpenWrt â24.10.4â?
Which revision of XG 115w do you have? Revision 3 has a port layout thatâs different from Revisions 1 and 2. See my mea culpa earlier in this thread:
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Ver 3. I figured out the ports but for some reason it just wont connect to internet. I just finished setting up OPNsense on it to see how it runs and it installed fine with no issues. Not sure why OpenWrt is giving me such a hard time. 
Please post your /etc/config/network. Letâs see whatâs holding you backâŚ
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I have made some progress! I had to edit the /etc/config/network to change LAN port IP as 192.168.1.1 was already being used by my current router. vi editor is a nightmare to use! Key strokes donât seem to register via serial connection or direct connection with HDMI and USB keyboard so that took a bit if fuzzing around to get it changed but after that following the instructions when very smoothly.
I ran the automated script and got all the disc space back but I am not sure about the ports. I should have 4 ports, 1 WAN and 3 LAN ports correct? Can I set those up in the Network Interfaces or does that have to be done via the console?
Check if they've been added to br-lan, if not, add them, if available.
You might need to modify /etc/board.json too.
don't post screen shots, they're useless.
keep adding list ports lines in the br-lan section to add any extra ports to lan.
you were told the same thing 6 hrs ago.
All very new and Greek to me, but I think I am picking-up what you are putting down.
Edit the /etc/config/network and under the config device section, add 2 more lines with the list ports of the other 2 available ports.
Like this:
config device
option name 'br-lan'
option type 'bridge'
list ports 'eth0'
list ports 'eth1'
list ports 'eth3'
(above list for future me when I need to do this again)
This seems to be the fix as I now shows 3 lan ports in the Interfaces section all grouped in br-lan and I plugged into those ports and they all seem to work now with internet access.
Thanks for everyoneâs help on this! I think I am ready to swap out the old Linksys EA6900 router with the Sophos SG115w.
Once youâve done this, does it create any issues when you upgrade?
Since this thread started, there was a development; @vgaetera has made a script that makes the repartitioning process much less labor-intensive:
https://openwrt.org/docs/guide-user/advanced/expand_root
I, in turn, have made a Web page about repartitioning and its persistence across upgrades that draws on that script:
https://ncbase.net/notes/openwrt-persistent-repartitioning
Hope this helpsâŚ
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Thanks. Separate question, has anyone on this thread successfully managed to reset the bios on one of these devices - one of the ones I got had a drained bios battery, and it wonât post to console/HDMI so I suspect it may have a corrupt bios.