Hi,
I am interested by the CCR2004-1G-2XS-PCIe.
I see there a pass-through mode. What is the network chip used ? Which driver is used on the Linux side ? Will it be usable with another OS ?
Thank you in advance.
Since it’s Marvell-based, I guess that will be some Marvell NIC?
Very cool product.
…but there is a switch with SFP28 ports misssing in the asssembly/line-up, isn’t it?
No use buying, when the only switches available are non-MT 
https://www.youtube.com/watch?app=desktop&v=GT1EWteOpTc&feature=emb_logo
Yep I expect it with big interests as well (also the price 
)
Mikrotik team, please be sure at leas https://help.mikrotik.com/docs/display/ROS/Controller+Bridge+and+Port+Extender work with this PCIe cards
Why this is important .. I will not mention a company from San Francisco and Fabric Extenders for HP servers .. for example … 
I believe CCR2004-1G-2XS-PCIe is a good candidate for similar setups but on steroids \m/
Recent Linux patches suggest it will use the Atheros atl1c driver on the host side:
If it is going to work well with Linux and Open/FreeBSD it would give us more flexibility and a lower price point than some Intel 10G!
I don´t yet really have a need for 25G, but the cheapest Intel 10G X520-DA2 would cost me around 120EUR.
W
Well, of course it is important that it works with VMware ESXi and other hypervisors, nobody would put such a card in a system running native Linux (or Windows)…
Fortunately, the startup delay would not be an issue then. This system boots so incredibly slowly that RouterOS has booted 10 times by then.
Agreed, but that is not my point.
Assuming you put one of these in a Linux box…how do you connect to the rest of your infrastructure (LAN / WAN). IMHO SFP28 is single-line…no way for a breakout cable
There is no MT switch out there with SFP28 ports.
My guess for the price point of this card would be more like $500… check the other CCR2004 devices.
But of course you can put in an SFP+ module or DAC.
And MikroTik have switches with QSFP+ so you could make an optical link with the appropriate modules.
…it’s around a 180USD/170EUR…you can place pre-orders already for that price.
Although pinouts are matching, whether these will actually work needs to be seen.
With the recent problems on CRS models with ports flapping on v7 even more so, I’d say…
And MikroTik have switches with QSFP+ so you could make an optical link with the appropriate modules.
so I get 2x10G out of 2x25G … bad trade…I’d rather invest in a proper switch
Well, lets hope you’re wrong 
:
https://www.ip-sa.com.pl/ccr2004-pcie-p-6525.html
Its price is 141,26EUR. Im not so sure if it stays at that price point, but I hope it wont get much more expensive.
Woland
Native Linux is interesting as a hypervisor itself (like for Proxmox or container, or just plain KVM). Native BSD is interesting by itself, as Opnsense or pfSense is running a BSD kernel. My plan is to put such a card into my Opnsense boxes.
That would be like a never dreamed of, best of both worlds, firewall/router combination.
Still agree, that ESXi support would also be important. Windows server ? Nah…
W
Btw ESXi is not the only popular virt solution .. proxmox is 100% pure debian also vm windows do not care for hypervisor nic drivers ..
I am amazed by this price… let’s see what we get (and if it becomes available instead of postponed due to “chip shortages”)…
And MikroTik have switches with QSFP+ so you could make an optical link with the appropriate modules.
so I get 2x10G out of 2x25G … bad trade…I’d rather invest in a proper switch
You can buy 25G optical transceivers both for SFP28 and QSFP+ so it should be possible to link at 25G.
Any idea what this passthrough actually 'look"?
Phisical port and pcie port are 2 separate ports in ros?
What I understand is that RouterOS internally sees 7 different interfaces, 3 physical ports to the outside and 4 virtual interfaces towards the PCIe, and there by default are 3 bridges that bridge between the 3 physical ports and 3 of the virtual interfaces. Or maybe a new feature allows for an even faster bridge for that purpose.
But, unless I am mistaken, the admin can remove that bridge configuration and have the card function as a normal MikroTik router.
I really hope this is the case 
I really hope that the card does not consume 22W of power (without attachments) - that would be way to much.