[ovirt-users] Can´t use a VM Network VLAN, because the Virtual Machines inside can't reach the Gateway

[Julián Tete]

Hi Friends of oVirt

This the data required:

I have a HP Enclosure with a HP SAN.
I can't change the net settings in the switch because we have VMware
Virtual Machines in production in the same enclosure.
The switch is in Trunk Mode and all the traffic are in Tagged VLAN's with
ID's: 1,50,90,91 and 100.
I can play with 6 blades.
I in the first Blade I installed oVirt in hosted engine mode.
The only S.O is CentOS 7.1

I used inxi to brig the data for you:

My First Host is the only host until now (SPM) is the first data domain
(NFS) and contains the hosted engine machine.
I installed oVirt with ovirtmgmt in VLAN 1, over the interface eno1,
without any VLAN Tagged configuration.

This the data for my first host:

http://pastebin.com/dfC0XTQM

This the data for the Engine:

http://pastebin.com/JdrMSbj0

This the data for the Virtual Machine created in VLAN 50:

S.O : CentOS 7.1
SELinux: Permissive
IP ADDRESS: 192.168.50.8
PREFIX: 27
GATEWAY: 192.168.50.1
Interface: eth0

The Virtual Machine hasn´t any VLAN configuration.

In the 3 S.O, Network Manager is stopped and disabled, connectivity is
managed by the network daemon.

This is the data for the Networking in the admin interface:

http://postimg.org/image/lbypejxrh/

http://postimg.org/image/jtkyhqs8f/

http://postimg.org/image/7dwf1nb9f/

http://postimg.org/image/6i9t75g33/

http://postimg.org/image/sm8e6lecv/

http://postimg.org/image/cvig7rjuv/

http://postimg.org/image/fxcthsrtl/

http://postimg.org/image/o6xjwwvyz/

http://postimg.org/image/pv5ar5v3j/

http://postimg.org/image/dx8br0gq7/

http://postimg.org/image/baixp4b0j/

This the case

With No IP in the VLAN, and IP in the Virtual Machine, From the Virtual
Machine can ping myself (192.168.50.8) but I can't reach the gateway, can't
reach the host, can't reach Internet.

Any help is appreciated

Thanks Friends of oVirt








2015-07-06 7:51 GMT-05:00 Soeren Malchow <soeren.malchow at mcon.net>:

> Hi,
>
> To make it easier to understand what the situation is, it would help to
> see your bridging configuration and your interface configration.
>
> Something like:
>
> #> ip addr
>
> And
>
> #> brctl show
>
> Regards
> Soeren
>
> On 06/07/15 13:30, "users-bounces at ovirt.org on behalf of Dan Kenigsberg"
> <users-bounces at ovirt.org on behalf of danken at redhat.com> wrote:
>
> >On Tue, Jun 30, 2015 at 03:48:49PM -0500, Julián Tete wrote:
> >> Hi Friends of oVirt
> >>
> >> I'm trying to migrate my company from VMware to oVirt.
> >
> >We'd like to help you do this!
> >
> >> In my final tests, I set up 2 more VLANs in oVirt, (VM VLANs)
> >> The Virtual Machines in these VLANs, can be reached from the external
> >>IPs
> >> from the net range,
> >> but from the Virtual machines only can ping the Host with the Bridge and
> >> itself, can't reach the gateway. ¿?
> >>
> >> I configured a IP Forwarding in the Host with the virtual machine, and
> >> nothing changes...
> >>
> >> Any idea ? This is the last duty before embrace oVirt in the company.
> >>
> >> Look to the VLAN 100 configuration (My desired VM Network):
> >>
> >> http://postimg.org/image/7hrog0a2n/
> >>
> >> http://postimg.org/image/68b40i1vr/
> >>
> >> http://postimg.org/image/lu6mlshgp/
> >
> >I must admit that I don't understand your problem yet. When you ping
> >from inside your guest, where are your packets dropped?
> >
> >I'd like to point that your "Hosting" network, as most VM networks, is
> >better off left without an IP address. The benefit of this is better
> >security (host TCP stack is not accessible from VMs) and less chances of
> >routing collisions from the host.
> >
> >So unless you need to use the same network for something other than VM
> >communication, try to clear its address.
> >
> >Regards,
> >Dan.
> >_______________________________________________
> >Users mailing list
> >Users at ovirt.org
> >http://lists.ovirt.org/mailman/listinfo/users
>
>
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