Re: Strange networking behavior
Florian Götz <f.goetz@hs-mannheim.de> wrote:
> I got a network problem with one of my Debian VMs. The VM runs on an
> ESX Host (5.1) with several other VMs (SLES11).
> It´s a Debian 6 (can´t upgrade due to errors with the other running
> software at the moment) which hosts a Network Management System
> (Opsview) based on nagios.
> If I disconnect a network switch in another building several other
> hosts get unavailable (are not pingable anymore). If I try to ping
> these hosts from one of the SLES machines on the same ESX host they
> are reachable. So it isn´t a failure in ESX Network Configuration
> etc.
> It takes about an hour before the hosts get back to state "pingable"
> on the Debian machine. So for any reason the debian host can´t get to
> these hosts, but after a sort of random amount of time everything is
> fine again.
How are your ESXi connected to your network? Single links from their
network cards to one or more switches or do you use a trunk/etherchannel
to connect them? Do you use normal vSwitches or a Distributed vSwitch in
your ESX servers?
Do you use STP or any variant of it to create redundant failover
datapaths in your network?
Does the situation (not pingable from Debian VM) still happen, after
you shutdown the Debian VM and restart it? Or if you vmotion it to a
different ESX server?
Grüße,
Sven.
--
Sigmentation fault. Core dumped.
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