Originally Posted by
marks
Hi Kamilleri
Are you saying that this is always happening (when someone on your same rack modified the vMAC you have a problem?)? if it's your case, let us have a look at your server.
I would say that's not the case at all, it doesn't happen as a rule. there can be the occasional bug, but generally speaking, even modifications done by yourself are put through without any problem. We just recommend not to do it on a live server, but it's not a problem that happens all the time.
Actually it has nothing to do with my server
at all.
This is what's happening:
1. You buying a server. Setting a bunch of virtual machines.
2. You ordered and configured all your failover IPs. Everything is perfect, all of IPs are online and working. No letters from OVH about misconfiguration.
3. You are not touching Control Panel anymore (as you don't need to change already existing vMACs).
4. After some time, let's say month or a two, all your failover IPs (except main IP) suddenly becoming unavailable in the same time. You were asleep at that moment. They are not receiving any input connection at all, nor ICMP nor service. Nothing.
5. You are trying to reboot virtual machines, reenable their network, recheck all firewalls, disable firewalls. Nothing helping, all IPs from your account is not available to connect.
6. Since nothing helping, you just remembering that switching anything in "IPs" tab at Control Panel actually doing some heavy operation that's locking the whole IP manager for 20-40 seconds for all failover IPs.
7. You are trying just to create or remove any vMAC, for example for not yet used failovered IP.
8. The whole IP manager is locked. Something is happening at the backend, you are waiting and watching at those AJAX loading animations.
9. Network is back. All failover IPs that was unavailable became available. By all means it looks like I fixed this issue by triggering any action in IP Manager.
At the moment when every failover IP became unavailable at the same time, I wasn't managing my server.
It also couldn't be software problem on server because nothing helped but triggering action in IP Manager. I really tried everything. There was some production stuff going on, and this network shutdown was unexpected to me.
I experienced this already 3 times.
Are you saying that this is always happening (when someone on your same rack modified the vMAC you have a problem?)? if it's your case, let us have a look at your server.
I don't know the way to reproduce this issue.
For me, it looks like sudden network shutdown on all failovered IPs. I'm not changing or managing anything at that moment.
This makes me think that MAC routing issue appearing after some other customer starting to change something at his Control Panel, or maybe when two of them changing something at the same time. I don't know when and why this is happening, I'm even not sure if this appearing after some other customer starts to change anything. Network just disappearing, and I'm forced to go to Control Panel and retrigger any action to make failover IPs go back online again. This is rather strange and annoying behavior.
I left a TICKET#2015042819005231 with logs and graphs on all our servers when we experienced our previous network loss, but didn't get any useful feedback at all.