Back when I had this router (I sold it for reasons already elaborated), I tested both the stock openwrt witch driver without the MIB counters as well as qca8k. Both behaved the same.
The way I observed this was simply by replacing the R7800 with a different router and observing ping times that I was getting in-game. I did this twice (again, the R7800 has really good WiFi). In the end, I got fed up.
edit: I have a feeling that a driver for the NSS cores will fix this, but I have no patience.
That's true. Not really a problem though as long as you do not feed it jumbo frames (e.g. on WAN) because then it will Oops (a work-around though exists by UCI setting MTU to a high value and thus ensuring the DMA buffer is large enough).
Combined with a simple true VDSL modem you'll be able to throw a lot of data to this router. Netgear DM200 is one of the very few VDSL modems available and comes with full OpenWrt support as well.
Hi all again!
Thx for all your posts and answers! They really helped! Finally I bought a Linksys WRT3200ACM to do my first steps into the OpenWRT world. I think it is a good starting point as it is widely supported and it seems to be the one more "beginner's friendly"
I already read a lot of documentation and have a lot more to read...there is a router pending to be flashed this weekend!
At least for me, getting away from the router-grade switch chips is a big advantage.
In contrast to decent, managed switches, these chips often come up pre-configured to bridge the LAN ports, which can result in VLAN leakage until the switch is configured, and often every time the switch is reconfigured (most drivers I have seen reset the chip on re-configuration). There's also the annoyance that the current drivers for some (most) chips require specifying the VLAN and PVID if you use anything other than the low-numbered ones. You also don't have exposed control over ingress rules (such as "only allow tagged packets") and other configuration for "non-trivial" use cases.
For some home fun at home or doing some smaller projects, i guess some cheap no-name imports are okay for that
But when doing critical projects, yeah i agree there are better choices.
For the wireless part,
yeah too bad i can't find any dual band cards either...
But cards with atheros chipset should be okay? they can also be used in ap mode?
Seems like, they offers from alibaba have to two mini pcie slots,
(maybe the sim card reader needs to be disordered, but im not sure..)
so it should be possible to have
one wifi card (like Compex WLE200NX) to serve a/b/g/n on 2.4GHz band and
one wifi card (like Compex WLE600VX) to serve ac on the 5GHz band ?
Problem is, there are only two slots for the antennas.
Maybe a T-Spltiter/Adapter can be used to join the 2.4 and 5GHz signals into one and
then feed that into a dual band antenna?
And for storage the sata port can be used with a 2,5" hdd or sdd.
(The casing has mounting support i think..)
For home use that should be quite okay...
No, you can't "split" or "join" antennas like that. Be careful as very often one or both of the PCIe slots are crippled in one way or another. Be aware that many PCIe slots can't supply either or both the right voltages and enough current for higher-power wireless cards. You're really a lot better off with an AP.
Edit: To be fair, yes, there are ways to combine and split RF in the GHz range. However, purchase of such units with connectors is comparable to or in excess of the cost of high-end wireless cards / APs. Design and fabrication of such circuits is beyond the capabilities of most computer hobbyists.