> You are lucky if 99.999% of the time network is not a problem.
This reminds me of one time I was having networking issues (around a CRUD GUI). Oddly, I identified the issue the (business) day before my users did. I was working on a rather large change (OS updates, 32->64 bit) and noticed that multicast updates broke. The timing was funny. I was working towards a minimal reproducible example already, and I had a small test app that showed that multicast was broke on my PC. So, I ran down and tried the app on their computers, and it worked... between the two of them, but not the company et large.
That's when I vaguely remembered an email for Network Ops about a router change on my user's floor over a weekend. I went by the Ops team (they didn't like email for some reason) and told them what I was seeing.
The short of it was, yeah, the router change screwed my 2 users on the floor (they got put on the printer VLAN by accident, which didn't receive multicast). Separately, the issue I saw was a bug in how we built a 3rd party lib on Windows that provided 64-bit multicast support.
This reminds me of one time I was having networking issues (around a CRUD GUI). Oddly, I identified the issue the (business) day before my users did. I was working on a rather large change (OS updates, 32->64 bit) and noticed that multicast updates broke. The timing was funny. I was working towards a minimal reproducible example already, and I had a small test app that showed that multicast was broke on my PC. So, I ran down and tried the app on their computers, and it worked... between the two of them, but not the company et large.
That's when I vaguely remembered an email for Network Ops about a router change on my user's floor over a weekend. I went by the Ops team (they didn't like email for some reason) and told them what I was seeing.
The short of it was, yeah, the router change screwed my 2 users on the floor (they got put on the printer VLAN by accident, which didn't receive multicast). Separately, the issue I saw was a bug in how we built a 3rd party lib on Windows that provided 64-bit multicast support.