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

[Julián Tete]

I found the reason of my Problem: the virtual machines can't write the ARP
table ¡¡¿?!!

When I manually use the command:

arp -s 192.168.XXX.XX 00:09:XX:XX:XX:XX

I can reach the gateway

I can't reach anything from my net segment but i can reach Internet (Double
¡¡¿?!!)

For the moment I wrote a script, but is awful to do this.

Any idea ?

Thanks in advance :)

2015-07-10 11:26 GMT-05:00 Julián Tete <danteconrad14 at gmail.com>:

> Perhaps us are affected by the following error :
>
> http://h20564.www2.hp.com/hpsc/doc/public/display?docId=emr_na-c04267968
>
> I will keep you informed
>
> Thanks Friends
>
> 2015-07-06 12:06 GMT-05:00 Julián Tete <danteconrad14 at gmail.com>:
>
>> 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
>>>
>>>
>>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.ovirt.org/pipermail/users/attachments/20151008/cd403bae/attachment.html>