[CentOS-virt] KVM networking issue
Mike - st257
silvertip257 at gmail.com
Thu Mar 24 16:35:44 UTC 2016
On Tue, Mar 22, 2016 at 1:57 PM, Kevin Ross <sedecim at gmail.com> wrote:
> Hi Mike,
> Thanks for the info. I'd rather run monitoring such as tcpdump from
> the VM if possible and not the host as a simulation of a network
Then run tcpdump on the VM. Same command or commands you'd have ran on the
> appliance and with the intent eventually of giving others access to
> the VM and not the host. Here is the xml file for the private network:
> WARNING: THIS IS AN AUTO-GENERATED FILE. CHANGES TO IT ARE LIKELY TO BE
> OVERWRITTEN AND LOST. Changes to this xml configuration should be made
> virsh net-edit virbr1
> or other application using the libvirt API.
> <forward mode='nat'/>
> <bridge name='virbr1' stp='on' delay='0' />
> <mac address='52:54:00:##:##:##'/>
> <ip address='192.168.100.1' netmask='255.255.255.0'>
> There are two VMs connected to this interface, and the monitoring or
> "appliance" VM is connected to both this and the external interface.
I take it you've tried testing basic connectivity from the VMs to whatever
default gateway is in place?
I see Spanning Tree is enabled, so you might check that an interface isn't
in the blocking state.
brctl showstp <BRIDGE_INT> | egrep '^(em|eth|vnet)|state'
I don't use the NAT network mode for KVM, so hopefully someone else can
chime in on that piece.
// SilverTip257 //
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