[ovirt-users] No traffic on dummy interface

[Alan Murrell]

OK, don't worry about this ticket.  It seems to be resolved now.  I 
noticed I was in fact missing "PROMISC=yes" in the ifcfg-dummy_* files, 
but even after adding, it I still needed to reboot the host for it to 
seemingly take effect (a simple "systemctl restart network" didn;t do 
the trick)

Weird :-(

-Alan


On 30/01/2016 10:03 AM, Alan Murrell wrote:
> Hello,
>
> I am running Ovirt 3.6.1 on CentOS 7.1 in a single server, hosted engine
> setup.
>
> I have created 10 dummy dummy interfaces names 'dummy_[0-9]'.  Ovirt
> sees them, and in "Networks" for my cluster, I created 10 10 "internal"
> networks called 'Internal_[0-9]'.
>
> In the "Hosts" tab, in the "Network Interfaces" tab for my host, I
> assigned the 'dummy_*' interfaces tot he appropriate 'Internal_*'
> network (i.e., dummy_0 -> Internal_0, dummy_1 -> Internal_1, etc.)
>
> I have create two VMs and assigned a NIC interface on each attached to
> the 'Internal_0' network.  I gave the interfaces on the gusts an IP int
> he same subnet, but they cannot talk to each other.
>
> When I try to ping one from the other, here is the response I get
> (public IPs redacted):
>
> --- START ---
> C:\Users\Administrator>ping 192.168.100.12
>
> Pinging 192.168.100.12 with 32 bytes of data:
> Reply from 192.168.100.20: Destination host unreachable.
> Reply from XX.XXX.XX.XX: TTL expired in transit.
> Request timed out.
> Reply from XX.XXX.XX.XX: TTL expired in transit.
>
> Ping statistics for 192.168.100.12:
>      Packets: Sent = 4, Received = 3, Lost = 1 (25% loss),
> --- END ---
>
> The IP of the PC I am pinging from is '192.168.100.20'
>
> I have been able to setup internal networks like this before, but seem
> to be missing something and I am not sure what?
>
> Here is what the dummy_0 interface shows when I run 'ip addr show':
>
> --- START ---
> 7: dummy_0: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue master
> Internal_0 state UNKNOWN
>      link/ether 0e:a2:6b:54:1a:91 brd ff:ff:ff:ff:ff:ff
> --- END ---
>
> and Internal_0 looks like this:
>
> --- START ---
> 20: Internal_0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue
> state UP
>      link/ether 0e:a2:6b:54:1a:91 brd ff:ff:ff:ff:ff:ff
>      inet6 fe80::dc07:84ff:fe1b:60cb/64 scope link
>         valid_lft forever preferred_lft forever
> --- END ---
>
> I am not sure what other info you need, so please do let me know.
>
> I did see this:
> <http://blog.duderamos.com/internal-isolated-networks-on-ovirt/> and
> except that I use 'dummy_*' instead of 'dummy*', my setup is the same.
>
> Thanks, in advance, for your help on this.
>
> Regards,
>
> Alan
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