I have two RB260GS connected by fibre (mikrotik SFP). This is done because the cable to the third floor is vertical and in the neighbourhood we have a lot of lightning (the RCD often trips in the house)
Normal ADSL setup. Modem (provided by ISP)—> RB260–> fibre—> RB260----> Omnitik + Ubiquity + FON.
ADSL is also the DHCP server. DG: 192.168.1.1. Scope: 192.168.1.10 —> .200
The weirdest thing: The Omniktik and other devices are reachable by their IP. Omnitik has a fixed IP: 192.168.1.243.
Omnitik is set as an AP, in bridge mode. All ethernet and WiFi is in the bridge. I can reach the Omnitik with Winbox.
The clients connected to the Omnitik, rarely get an IP from the modem, and if they do, the default gateway is not mentioned, and if it is mentioned it is not reachable.
When I go in Winbox, and ping the default gateway FROM the Omnitik, I get timeout. When I ping 8.8.8.8 or any other website (like nu.nl or mikrotik.com), it DOES reply with the ping.
Because the default gateway is not pingable, I almost cannot use the internet when connected to the Omnitik by WiFi or when I plug in the cable into one of the ports.
I started the simple “trouble shooting”.
Plug in the laptop by cable directly into the modem. No problem, within 3-4 second an IP, and internet runs perfectly.
Plug in the laptop into the RB260 (which is next to the modem), I get problems. IP received after 30-50 seconds, and also no internet traffic possible. Gateway is not reachable (no ping reply).
I CAN ping google DNS (8.8.8.8 ), but not the gateway!
I checked the settings in the RB260, nothing special. I do not use VLAN’s. I updated the SW to 1.13. No change.
IP on the RB260:
192.168.1.240
192.168.1.241
(both visible in Winbox and as neighbours in Omnitik)
What is the problem? How does the RB260 change the packets? I thought it was a “simple” switch with fibre capabilities… I could have used a media converter…
Have anyone seen this behaviour?
Haik