Admittedly.. I’m sort of a Mikrotik noob. I just starting using the products about a year ago when I obtained a position with an ISP who uses Mikrotik routers and switches almost exclusively. It’s been about a year-long crash course in learning and trying to diagnose systems and a platform that I’ve never used before.. It’s been thrilling…
But I’ve found myself in a situation. I’ve found that my previous home networking equipment had come to lack the features I’ve grown accustomed to while working with Mikrotik systems, and I needed ditch the pretty lil “Apple” of networking products,coughunificough in favor of something that admittedly doesn’t have as pretty of a UI, but has a ton more features.
I just purchased the new CCR2004 and already had a CRS238-24P. I switched the CRS238 into SwOS and set the CCR2004 up as my primary router. I connected the two with a 10GB SFP+ DAC cable.
On the surface, everything seemed to be fine. Then I run a speed test from one of my systems and found it getting just horrible speeds, compared to another system on the same switch. I’ve got a 1Gb down and 100Mb up WAN connection, and the system in question was pulling about 2-5Mbps up and down, and the other system about 600Mbps and near full upoad speeds.
However.. When I remove the DAC cable, and uplink the switch to the router in the router’s 1gb management port.. Everything works as normal and the server is able to pull about a 700Mbps speed test…
Why are speeds being throttled over a 10GB DAC, and not with a 1GB ethernet port?
Am I missing some configuration options?
Do I need to do anything special for the 10GB uplink?
The router and switch configs are pretty bare-boned at the moment.. Just basic port forwards for a few services and all the ports bridged. No vlans or anything like that.
If anyone can help me out, I’d greatly appreciate it.
Oh and the DAC is a ipolex CAB-10GFTP-P0.5M.. Passive.
Could be that either of Mikrotiks is not really compatible with DAC you’re using. Mikrotik devices (and SFPs for that matter) seem to be notorial about incomplete SFP/DAC compatibility (even Mikrotik’s own SFPs and DACs are compatible with all of their devices). So you may want to try different brand of DAC cable, possibly a Mikrotik one (their DAC cable is marked as supported on both of your devices).
Well the Official MikroTik DAC cable made no difference what so ever…
I will point out that every other device connected to this switch is performing wonderfully and as expected, however, as soon as I plug my server into it, the switch throttles it, and only it’s connection down to nothing. The only thing I can think is there is some odd conflict between the particular network card that’s in this server and the switch.
The server’s nic works find on the router. Exactly as intended.
I can think of no other explanation.
lspci shows the card as being a:
Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 06)
No clue as to why the switch hates it but not the router.