It seems we are having bit flips inside of packets coming into Azure (Germany West Central) via our Express Route. Anyone else seeing this?
by dharmab on 10/28/23, 10:05 PM
I did back in ~2017 or so while I was working at $BIGAZURECUSTOMER. It was tough getting a hold of the right person in support, so we pulled some backchannel strings. Turns out an update to their hardware had disabled ECC on some switches.
by klaas- on 10/28/23, 2:29 PM
So it seems this is their software defined network, the packets still look good when entering via the microsoft edge routers and they get bitflips on their way into our express route
by shrubble on 10/28/23, 6:52 PM
Can you do Wireshark style packet captures somewhere that show it? Very likely that would be what support would ask for.
by klaas- on 10/30/23, 12:13 PM
I also have a follow up to this topic. I would say it looks like in Azure nobody is verifying TCP checksums. A bitflip in tcp payload should have been noticed at the NIC/tcp level but it reaches my application with corrupted data.
by johnwheeler on 10/28/23, 9:01 PM
Like from neutrinos?