Posted on April 28, 2015 2:46 pm
 |  Asked by Nicholas Kasioulis
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i have a setup with two 7050X in MLAG Domain. I have most of my Physical servers connected to the two Switches 10G interfaces with LACP and LAG and everything works great. However, i have a few specific servers that needs to be connected to the two switches( one server port to first switch and second server port to the second switch) but without LACP(the servers will be in a Hyper-v Cluster with software defined nic teaming). The question is, do i need to create a LAG without LACP in order to connect the server to the switches or do i need to just have the two ports on the same VLAN.


Thanking you in advance

Posted by Alexis Dacquay
Answered on April 28, 2015 3:23 pm

Hi Nicholas,

Can you clarify why not LACP ? Is that related to your servers version ?

Under Windows servers you can choose ”switch independent” for active-passive connectivity to the switches. In this scenario the links are connected to standard ethernet switching port, without forming a joined-up MLAG among the switches. This is not ideal because you don’t utilize your backup link and failovers can be a bit longer. This is the least desirable option, I think

Without LACP, you can still use ”Static Teaming / LAG”. Is that the option you are talking about with ”software defined NIC teaming ?” You can have an MLAG with static port-channel/LAG just like you would have with LACP LAG.

So if possible, do build a static LAG with MLAG. This is preferable to ”switch independent





Posted by Nicholas Kasioulis
Answered on April 29, 2015 6:45 am

Hi Alexis,

The reason we want o build a switch independent teaming and not switch dependent(LACP or Static) is because of some issues we faced with the Driver of the server’s 10G Nic cards. For now my only option is to go with switch independent.

Thank you for your clear answer. I will leave my config as is, without forming a lag and just have the two ports on the same VLAN and have switch independent teaming.




Posted by Nicholas Kasioulis
Answered on April 29, 2015 6:46 am

forgot to put that this issue has been resolved on my previous post.

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