Running the 21.02 rc3 build on wrt1200ac hardware, I noticed that only one of the switch's CPU port is supported. That is, the DSA ports lan1-lan4 and wan are all backed by the eth0 master port; the other master port on the SoC is not made available as a separate device.
Is there a way to change that, exporting the second master port, maybe with manually assigning which DSA ports should be controlled by it ?
My concerns are two fold:
- That the single CPU port could limit routing performance to essentially 1Gb/s half duplex, as the traffic in both directions has to traverse the CPU port, instead of 1Gb/s full duplex when separate CPU ports are available for both ends of the routed traffic;
- That the single CPU port makes it harder to shape traffic on the WAN port without adding overhead to traffic going to the LAN ports (as would be easy if we had separate master ports with independent qdisc configs).