[Users] ovirt & iscsi mulitpath
Dear all, After some problems I have my ovirt setup running now. But I run into a new problem with the network configuration. We have a quad nic with 4 gigabit connections over 2 switches (2X2) and an active/passive iscsi SAN. The first is connected to switch 1 and the second to switch 2 with a 10Gbe link. Now I would like to use iSCSI multipathing instead of bonding but I cannot use the same vlan for multiple storage networks and I cannot assign the same storage network to several nic's. I could use bonding, but we use 4 links over 2 switches and if I read everything correctly bonding only works through a single switch. How do other people achieve this? -- Kind regards, Netbulae Jorick Astrego
----- Original Message -----
Dear all,
After some problems I have my ovirt setup running now. But I run into a new problem with the network configuration.
We have a quad nic with 4 gigabit connections over 2 switches (2X2) and an active/passive iscsi SAN. The first is connected to switch 1 and the second to switch 2 with a 10Gbe link.
Now I would like to use iSCSI multipathing instead of bonding but I cannot use the same vlan for multiple storage networks and I cannot assign the same storage network to several nic's.
multipathing is not iSCSI specific. i.e. if you setup multiple connections which expose the same device then multipathd will automatically work. If I understand your setup correctly then all you have to do is connect to all the targets and then use the device exposed. You will see in the GUI that the device is reachable from multiple targets.
I could use bonding, but we use 4 links over 2 switches and if I read everything correctly bonding only works through a single switch.
How do other people achieve this?
-- Kind regards,
Netbulae Jorick Astrego
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2012Jorick Astrego:
Dear all,
After some problems I have my ovirt setup running now. But I run into a new problem with the network configuration.
We have a quad nic with 4 gigabit connections over 2 switches (2X2) and an active/passive iscsi SAN. The first is connected to switch 1 and the second to switch 2 with a 10Gbe link.
Do you mean you have a host(ovirt node) with a quad nics conneting to switches? And one SAN connecting to the switch 1 in another side, the other SAN conecting to switch 2 with a 10Gbe lnk? I think a picture will make the text description more comprehensive.
Now I would like to use iSCSI multipathing instead of bonding but I cannot use the same vlan for multiple storage networks and I cannot assign the same storage network to several nic's.
I could use bonding, but we use 4 links over 2 switches and if I read everything correctly bonding only works through a single switch.
How do other people achieve this?
-- --- 舒明 Shu Ming Open Virtualization Engineerning; CSTL, IBM Corp. Tel: 86-10-82451626 Tieline: 9051626 E-mail: shuming@cn.ibm.com or shuming@linux.vnet.ibm.com Address: 3/F Ring Building, ZhongGuanCun Software Park, Haidian District, Beijing 100193, PRC
On 10/21/2012 04:09 PM, Shu Ming wrote:
2012Jorick Astrego:
Dear all,
After some problems I have my ovirt setup running now. But I run into a new problem with the network configuration.
We have a quad nic with 4 gigabit connections over 2 switches (2X2) and an active/passive iscsi SAN. The first is connected to switch 1 and the second to switch 2 with a 10Gbe link.
Do you mean you have a host(ovirt node) with a quad nics conneting to switches? And one SAN connecting to the switch 1 in another side, the other SAN conecting to switch 2 with a 10Gbe lnk?
You are right, that's our test setup.
Now I would like to use iSCSI multipathing instead of bonding but I cannot use the same vlan for multiple storage networks and I cannot assign the same storage network to several nic's.
I could use bonding, but we use 4 links over 2 switches and if I read everything correctly bonding only works through a single switch.
How do other people achieve this?
The problem I had was that I could't put all the storage nic's in the same vlan using the ovirt interface. But I talked to our networking guy and he said just use an untagged vlan instead of trying to put all the storage nics in the tagged vlan. I have to brush up my networking knowledge. Thanks for replying though. And thanks to Ayan too, multipath is now working fine. Regards, Jorick
participants (3)
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Ayal Baron -
Jorick Astrego -
Shu Ming