[ovirt-users] newbie questions on networking

[Dominik Holler]

On Thu, 3 May 2018 09:30:17 -0700
"Rue, Randy" <randyrue at gmail.com> wrote:

> Hi Again,
> 
> I'm not sure if my first post yesterday went through, I can see it in 
> the list archives but I didn't receive a copy and I've confirmed my
> list settings include me getting a copy of my own posts. In any case,
> nobody has replied and unless I'm the only guy that needs my VMs to
> talk to the rest of the world I assume someone else knows how to fix
> this.
> 
> I've read and re-read the Quick Start Guide, Installation Guide and 
> Administration Guide even though they appear to describe an earlier 
> version. If I've overlooked the answer and this is an RTFM issue,
> feel free to tell me so but I'd be grateful if you'd also tell me
> exactly which part of the FM to read.
> 
> Again, my VM is getting an IP address and nameserver settings from
> the DHCP service running on the server room subnet the oVirt host
> sits in. 

This looks like the oVirt setup is fine.

> From the Vm, I can ping the static IP of the host the vm is
> on, but not anything else on the server room subnet including the
> other hosts or the subnet's gateway. The "route" command sits for
> about 10 seconds before completing but eventually shows two rows, one

Maybe the route command tries to resolve hostnames using an unreachable
DNS server?

> for default with the correct local gateway and one for the local
> subnet. All appears to be well on the VM, the problem appears to be
> the host is not passing traffic.
> 

Maybe the host passes the traffic, but the network equipment outside
the host prevents IP spoofing of the host?
Can you check if the VM traffic is pushed out of the host's interface,
e.g. by tcpdump on the hosts outgoing interface?

To check if the problem is the network between the hosts, you can check
connectivity between two VMs on two different host connected via
an external network of the ovirt-provider-ovn. This way the VM
traffic will be tunneled in the physical network.

> The dialogue for the interface on the host shows some logos on the 
> ovirtmgmt network that's assigned to it, including a green "VM" tile.
> Is this the "outside" role for commodity connections to a VM?
> 
> I've also spent some time rooting around different parts of the admin 
> interface and found some settings under the ovirtmgmt network's vNIC 
> Profiles for the "Network Filter." Tried changing that to "allow
> IPv4" and then to "No Network Filter" with no change.
> 
> I hope to hear from you soon.
> 
> randy in Seattle
> 
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