I think some weard problems started around 6.33. There are posts of different topics about things like Winbox and VPN traffic not working but traffic through the device was fine. Some thought MTU changes but I'm not sure I saw concrete fixes. I know earlier versions don't do this.
> I recently upgraded one of those RouterMaxx 1106 routers from 5.2 to > 6.33.1 > (I actually configured a new router and swapped hardware). Ever since, I > have had performance problems with a couple ports that are connected to > radios with 100M Ethernet ports. The most obvious symptom is that Winbox > won't stay connected or can't download plugins, but I also see pings > dropped > even to the directly connected equipment. > > I was a bad boy making multiple changes at once, so I've been gradually > walking them back in the lab on the original router, I upgraded it to > 6.33.1 > and the problem appeared. I dropped back to 6.31 and it was still there, > but when I dropped back to 5.26 everything was fine again. I haven't > tried > earlier 6.x versions yet, 6.31 is the oldest x86 version I have handy. > This > is not a radio problem, I can reproduce it with a directly connected > laptop > if I force the laptop NIC to 100M FDX. > > Is anyone familiar with this problem? I can't find anything on the > Mikrotik > forums. I guess I can live with 5.26 if I have to, but I'd like to know > what is causing this. Do I just need to change some configuration > parameter? I know 6.x brought out hardware only queues, but I think > that's > for Routerboards, not x86. Is there a problem with the Intel NIC drivers > included with 6.x? Any chance that an earlier or later version of 6.x > will > work for me? I see nothing in the change logs about it. > >
