Hi,
I have 951G-2HnD which I had setup as wireless repeater. Let’s call it AP3.
I first configured it over ethernet, assigned static IPv4 and IPv6 addresses and was able to access device over both protocols.
Then I set up wireless repeater mode and it works fine, but wirelessly I can access it only over IPv4.
I am curious to understand why I cannot access it over IPv6. Any thoughts?
I can post any part of configuration upon request.
hi,
if your repeater connects to a non-mikrotik AP - so you cannot use ‘proper’ bridge mode on wifi, but only the pseudo-bridge ones - you can run into problems. ipv6 “L3->L2 address mapping” relies on multicast, unlike ipv4 where ARP uses ‘just’ broadcast. if wireless frames have enough mac addresses in them (you need 4 addresses to have proper bridging) it should work properly. indeed you can run into problems with pure mikrotik gear: if you run capsman - as capsman doesn’t support bridge mode either.
check out https://wiki.mikrotik.com/wiki/Manual:Multicast_and_wireless to see how multicast traffic is regularly handled inside the AP, but there are ways to have multicast helper on wifi where the MC traffic is sent ‘as unicast’ to each STA on the AP. try setting it to “multicast-helper=enabled” on the AP.
i did not use pseudobridge setup with ipv6 so far, but pseudo bridge has enough limitations in itself even with ipv4.
btw, i fixed the capsman setup by using tunnels and run BCP over them: i just used WiFi STA on the device, and ran a tunnel from the STA to the AP via L2TP.
Hi,
thanks for reply.
Actually, AP2 in diagram above is also Mikrotik device. AP1 is OpenWRT.
If I set multicast-helper=full on AP2 for wlan interface that is bridging with AP3, then I lose even IPv4 connectivity with AP3. I get it back again if I set multicast-helper back to default.
I admit I feel poking in the dark with these settings anyway.
Br,
Ivars
If both AP3 and AP2 are mikrotik, then you can create transparent wireless hop if you set one of the two APs to mode=bridge or mode=ap-bridge (the former if both APs are used exclusively for point-to-point connection, the later if master AP should serve “normal” stations as well). The other AP should be configured to mode=station-bridge …
You can read about different modes in this article.
Such wireless hop should be L2 transparent so any of L3 (IPv4, IPv6, …) protocols should be working just fine.
Indeed, my AP3 wireless inerface was set to station-pseudobridge mode. As soon as I changed it to station-bridge, IPv6 address of AP3 came online and I could access it through IPv6 interface.
Thanks for all, everyone!
Ivars