On 5/12/23 08:53, Chris Adams wrote:
I have a couple of these, one in my home server (which includes NFS) and
one in my primary desktop, connected through a Mikrotik CRS305 switch,
and the setup works fine. I am using bridging on both systems (for
VMs), and that works fine as well. Checking my interfaces, it looks
like LRO is already disabled (I'm guessing by the "atlantic" kernel
driver, as I haven't set any ethtool options).
I have experienced a couple of issues, both related to putting my
desktop to sleep when I'm not using it:
- Every once in a while, when I resume, the network is dead. There's a
kernel oops (that's kind of vague) and I have to reboot. This isn't a
huge problem, because it only seems to happen after a bunch of
suspend/resume cycles, and I typically reboot for updates more often
than it happens.
- I also run jumbo frames, and after a suspend/resume cycle, the MTU on
the NIC resets to 1500 (while the bridge interface stays jumbo). This
breaks communication. I don't know if the driver is expected to
restore the MTU and isn't, but NetworkManager also doesn't seem to
handle bridge+suspend/resume right; NICs show "connected (externally)"
in nmcli after a suspend/resume, like NM loses management of them.
I've just hacked around this by adding a dispatcher script to reset
the MTU.
Do you just use a copper SFP+ module like
https://www.ebay.com/itm/164322691847 in the Microtik? I'd love to know
what you use.
I was leaning towards this switch:
https://www.amazon.com/TP-Link-TL-SX105-Wall-Mount-Protection-Auto-Negotiation/dp/B09CYNHL4S.
It looks super simple, it already has the copper interfaces so I don't
need SFP+ modules.
My preference is to use plain old cat7 ethernet, like 10 foot cables or
so:
https://www.amazon.com/AmazonBasics-High-Speed-Gigabit-Ethernet-Internet/dp/B07ZTQY9DD/
Thomas
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