Hello guys, I’m new to using mikrotik. I have the following network topology.
2 mikrotik an 2 antennas of another brand. When to do ping beetween Mk_1 and Mk_2 I have a loss 23% packets, but I ping the antennas it works fine. I think the problem is between Sta and mk_2, but the link is runnig (link-on) the negotation is 100Mbps. How to know if the problem is in the cable?what tests can I do?
Thanks
Nice diagram, but lots of missing detail. I assume MKT1-AP as 100 Mb ethernet, just as station-MKT2 is.
How is the connection between AP and station? Wifi of course but what protocol ? Is this bridged? How does your wifi (station) support bridging? (normally this does not work). Are you using WDS or other bridging protocol? Or is your station just a wifi station, and do you route to the MK2?
What are the ping results between MKT2 and station? And between MKT2 and AP? MKT1 - AP, MKT1- station etc etc …
In the Mikrotiks you also have throughput tests between Mikrotiks (Tools → Bandwidth test). You need to fill in IP address, Username and password of the other Mikrotik.
Devices send as a certain modulation rate, in the case of ethernet this is not variable its fixed at 10/100/1000mbit. It can’t drop its speed down to say 800mbit/s if the cable is a little wonky. It can drop down to 100mbit if the NIC detects a missing pair or a poor enough signal ratio, it will never go up to 1000mbit unless reconnected or manually told to do so
If it links up at 1000mbit it WILL send at that speed. Now the question is does the receiving side get all of those packets? The ethernet standards are very forgiving, they don’t run at the bleeding edge of whats possible. Even a somewhat questionable cable run should see 100% perfect packet transmission with zero corrupted packets. EMI, really poor termination, bad NIC etc can cause this but the good thing is you can monitor for it, every packet has a Frame Check Sequence attached to it. The NIC will report on every packet it receives and it will increment the FCS counter when it receives a corrupt one. Just look in the ethernet Rx stats tab of that interface and see if there’s any FCS errors. If there’s just a couple then fine, if you are seeing hundreds/thousands then the cable has issues
Note that this is the ‘Received’ corrupted packets, as such you need to check it on both devices in a link as its entirely possible that A->B is fine but B->A has issues