[Users] Re: Hosts not responding

[Gregor at HostGIS]

> Are you using the veth or vnet drivers?  If it's vnet, I don't have a
> clue.  I depend on IPv6 for a lot of things and vnet is not IPv6

veth
Though it's IPv4, not 6. And it's very vanilla: static IPs in all VEs, 
no DHCP or SMB services at all.


> Often it's very transitive.  Bridges tend to
> "stall out" as things get added to them and they relearn their MAC
> deliveries, but that's usually only seconds.

Hrm. I'm seeing minutes sometimes, in this case hours until I stumbled 
across pinging out.

So far I've not seen a pattern; different VEs on different HNs, 
sometimes the same one 2-3 times in a night, sometimes 2-3 different 
ones over a week, sometimes only 1 in a week. This is the first time 
though, where it lasted more than 10 minutes.


Like I said, I'm wondering whether it's some ARP announcement issue with 
the veth, the Ethernet bonding, and the 2 switches.

I'm also wondering whether switching to venet could solve this, as well 
as provide other benefits such as performance and security. We do not 
use DHCP, SMB, or other MAC-based services, nor IPv6, so these omissions 
from venet would be acceptable.

-- 
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