troubleshooting Question

Experiencing network problem with HyperV on Windows server 2012 R2

Avatar of Dextro666
Dextro666Flag for Belgium asked on
Windows Networking
5 Comments1 Solution1019 ViewsLast Modified:
Hi,

I recently installed a Windows 2012R2 Server on a Power edge T620 with HyperV role.
There are 2 network cards available on the physical server. One intel Gigabit I350-t LOM with 2 ports and the second is the same with 4 ports.
The HyperV is on the network via the NIC1 form the first Nic, with a fixed IP.

NIC available
Then, I have configured a NIC Teaming on the server. The team is for external access of VM. SLOT port 3 and port 4 from the second NIC are member of this team.
In additional properties: Teaming mode: Switch independent – Load balancing mode: Hyper-V Port – Standby adapter: None (all adapters Active)

NIC TEAMING
Then, I have created a Virtual switch for external access, which refer to the NIC TEAM.

vSwitch
Finally, in the settings of VM, the network adapter was set on the created virtual switch.

NIC for VM
Connexion to LAN and WAN are working from HyperV and from VM.
In the beginning, I was thinking that all was working properly.

However, if I wait about 2 minutes, the networks speed for external access , I mean for WAN, will become very very slow.
For example, a ping to google.com will answer with a time of 1500-2000ms…

- If I unplug the second cable of the Nic team AND the cable of the HyperV, then, the network speed is ok…
- If I plug again a cable from the Nic1, or the second cable from the team, it will work normally for 2 minutes, and then the speed will go down again…

The topology of the network is simple :
Physical Hyper-V is connected to a 24P switch.
The switch is connected to a Firewall.
Firewall is connected to Router/modem.

It seems that only one cable can be connected to the switch from the physical server, otherwise the speed for WAN is going bad.

I hope someone can help me or have already experienced this..

Thank you very much.
ASKER CERTIFIED SOLUTION
Join our community to see this answer!
Unlock 1 Answer and 5 Comments.
Start Free Trial
Learn from the best

Network and collaborate with thousands of CTOs, CISOs, and IT Pros rooting for you and your success.

Andrew Hancock - VMware vExpert
See if this solution works for you by signing up for a 7 day free trial.
Unlock 1 Answer and 5 Comments.
Try for 7 days

”The time we save is the biggest benefit of E-E to our team. What could take multiple guys 2 hours or more each to find is accessed in around 15 minutes on Experts Exchange.

-Mike Kapnisakis, Warner Bros