[Users] How do Networks and Vlan-tagging work in oVirt ?

[Moti Asayag]

On 02/13/2013 12:40 AM, Matt . wrote:
> Hi guys,
> 
> Thanks, this clears it more why we have VM and display options and how
> it's used on the nics.
> 
> What hapens with me on a 3.2 installation when I want to attach a
> network without IP (VM option or not) to a Nic I get the noticed error
> like I told before:
> 
> Error while executing action Setup Networks: Illegal or Incomplete IP
> Address
> 
> 
> Here is the error from the log:

Could you attach the rest parameters of this command ? (grep for all the
lines from the log that include the string: 7289062c)

> 
>         eth2 {id=713f2687-6d84-4010-9076-fbfc67cf6831,
> vdsId=033febb8-4f52-4253-bb6d-a8807816affd, name=eth2,
> macAddress=00:1c:c4:d8:cb:36, networkName=LAN_TEST, bondName=null,
> bootProtocol=NONE, address=, subnet=, gateway=null, mtu=0,
> bridged=false, speed=1000, type=0, networkImplementationDetails=null}],
>     removedNetworks=[],
>     removedBonds=[]), log id: 7a99dbd1
> 2013-02-12 23:31:08,783 INFO 
> [org.ovirt.engine.core.vdsbroker.vdsbroker.SetupNetworksVDSCommand]
> (ajp--127.0.0.1-8702-10) [7289062c] FINISH, SetupNetworksVDSCommand, log
> id: 7a99dbd1
> 2013-02-12 23:31:09,796 ERROR
> [org.ovirt.engine.core.vdsbroker.vdsbroker.BrokerCommandBase]
> (ajp--127.0.0.1-8702-10) [7289062c]
> org.ovirt.engine.core.vdsbroker.vdsbroker.VDSNetworkException:
> VDSGenericException: VDSNetworkException: Specified netmask or gateway
> but not ip
> 2013-02-12 23:31:09,797 ERROR
> [org.ovirt.engine.core.vdsbroker.VDSCommandBase]
> (ajp--127.0.0.1-8702-10) [7289062c] Command SetupNetworksVDS execution
> failed. Exception: VDSNetworkException: VDSGenericException:
> VDSNetworkException: Specified netmask or gateway but not ip
> 2013-02-12 23:31:09,798 ERROR
> [org.ovirt.engine.core.bll.network.host.SetupNetworksCommand]
> (ajp--127.0.0.1-8702-10) [7289062c] Command
> org.ovirt.engine.core.bll.network.host.SetupNetworksCommand throw Vdc
> Bll exception. With error message VdcBLLException:
> org.ovirt.engine.core.vdsbroker.vdsbroker.VDSNetworkException:
> VDSGenericException: VDSNetworkException: Specified netmask or gateway
> but not ip
> 
> 
> Why does this happen on None Bootproto or DHCP ?
> 
> 
> 2013/2/12 Moti Asayag <masayag at redhat.com <mailto:masayag at redhat.com>>
> 
>     On 02/11/2013 12:37 PM, Matt . wrote:
>     > I'm struggeling setting up my network in oVirt at the moment as I
>     would
>     > like to seperate specific VM's from other devices/clients in my
>     network.
>     >
> 
>     You should define the 'logical networks' which describe the networks of
>     your setup.
>     See the response to Nicolas on this thread of the steps to achieve it.
>     If wish to create a network dedicated to storage which shouldn't allow
>     VMs to use it, it should be defined as non-vm network.
>     Once the network is assigned to a cluster, you can add new network
>     interface to your VMs which defines to which bridges (vm networks) they
>     are connected: hence, segregating the VMs is done by the vlan-id of the
>     bridge the VMs are connected to.
> 
> 
>     > I have decent setup switching network using Vlans, this is also
>     the fact
>     > for ovirt and the storage nodes where teh ports are seperated between
>     > storage and management.
>     >
>     > Because I want to manage which client can acces which VM I need Vlan
>     > tagging. The question is where are we going to do this, on the VM
>     itself
>     > or on the network I attach the VM's Nic to.
>     >
>     > Because of the lacking documentation at this point it's not clear,
>     so I
>     > would like to figure out and maybe change the wiki there.
>     >
>     > I also cannot understand why I can set an IP to a network and only the
>     > subnet where I also can set DHCP which puts also the gateway.
>     >
> 
>     The default gateway can be provided for the management network only. You
>     can define its IP address either as static by providing its known IP
>     address or letting it determine the address from the DHCP server.
>     You cannot select 'None' as boot-protocol for the management network
>     since then the engine will not be able to communicate with the host.
> 
>     However you can select 'none' boot-protocol to any other networks if
>     wishes.
> 
>     > I'm not able to set None or DHCP and can only add a network with
>     IP, but
>     > what IP and why ? Or just a 192.16.x.0 with a 255.255.255.0 subnet ?
>     >
>     > I hope someone can clear this a little bit more out.
>     >
> 
> 
> 
>     > Thanks!
>     >
>     >
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> 
>