Anyone ever seen strange partial connectivity?
What could explain this strange connectivity matrix:
| Ping from/to | 1.1.1.1 | 8.8.8.8 |
|---|---|---|
| Lan A (vlan 48) | Works | Unreachable |
| Lan B (vlan 49) | Works | Works |
| Firewall | Works | Works |
| Lan A host 1 | Lan A host 2 | |
| Firewall | Unreachable | Works |
| Firewall | ||
| Lan A host 1 | Works | |
| Lan A host 2 | Works |
A reboot of the router solves it... but I still think this kind of strange state is something unique I haven't ever seen before. What could this be?
I see a one-way ping to (some of) the hosts on one network. There's multiple LANs, all with configurations that only block traffic to each other. Yet for some reason one of these LANs cannot communicate with the outside world.
It can't be google DNS blocking this location, as it all works just fine from the other VLAN.
Most of what I see with partial internet is DNS issues, but here it's even pinging specific IPs where you see some are reachable and others are not. It's also not the internet provider, as the problem is also contained to one specific VLAN.