Well, I picked up a second NIC yesterday and got everything working again with a static IP. (I may play "network administrator" with IGMP snooping next year, but for now I would rather focus on radio. )
Anyway, thanks for your wonderful support, very much appreciated.
73 John VE6EY

Hi Scott, thanks, you were right on the mark.
I disconnected the Telus router from the switch. Then, I ran my ANAN 7000 at the highest streaming rate for 20 minutes: NOT A SINGLE SEQ ERROR! Reconnected the Telus router and the problem returned. So, it looks like some sort of broadcast traffic ...

My original setup used XFinity XFI Advanced Gateway (cable co supplied). Setup was:
cable -> Gateway -> Netgear Switch -> everything else (radio, PC)
This worked well for ANAN on Protocol 2.

Last month I switched to a telco fiber connection which uses Telus NH20A (Arcadyan). Setup is:
fiber ...

Yes, throttle index activated.
This is frustrating because everything was perfect before the two changes noted above.
I have also substituted a different CAT7 cable, and done a firmware update on the Netgear switch, to no effect. Also, I completely shut down my infrastructure and brought it back up ...

No change after updating to Thetis 2.9.0.6 and firmware Metis_Orion_MkII_Protocol_2_v.2.1.18.rbf
Sequence errors continue as described earlier.

After a year of great performance, my ANAN7000 DLE MKII Black has started issuing frequent SEQ errors again (around once a minute). Nothing changed at this end, except:
* Windows 10 Updates :(
* Changed to a different ISP and my LAN now runs on 192.168... local addresses rather than 10.0... with ...

I have done extensive work with both analog and digital diversity reception over the past few years, particularly for simple beamforming and interference cancellation. You can find tons of information and videos about these through my blog Making It Up (at http://play.fallows.ca

In addition to ham ...

Thanks, will give that a try.

I can't get my ANAN to provide data beyond 192,000 sample rate and get occasional dropout during listening.

I got my 7000 DLE MKII during summer 2021. Running it with Thetis 2.8.11. Radio shows in H/W Select as Ver 2.7. Radio is connected to Gigabit Switch (Netgear GS308e). While my computers and ...