Issues with a 40G network
Bajet €30-250 EUR
I had a 1Gb network which I upgraded recently to 40Gbps.
I have DELL servers with ESXi7 installed.
When I run iperf between two virtual machines, I get a bandwitch ranging from 6Gbits/sec to 10Gbits/sec.
When I copy files with scp I getting a transfer speed of about 110-120MB/s which is very far from the theorical bandwitch of 1GB/s x 4 ~ 4G/s for a 40G network.
Recently I discovered that encryption reduce transfer speed so, I setup FTP server. Transfer speed doubled with FTP. I got a transfer rate about 240-280 MB/s.
I also updated MTU to 9000 on both hosts and VMs but transfer rates are still the same.
I am looking for an Cisco/VMWare expert who can identify and solve the issue.
I need 40G Network bandwidth as configured in Switch to be reflected in Virtual machines
I also need the transfer speed to reflect as close as possible transfer speed of 40G network (~1250 MB/s x 4).
You will need to connect remotely using TeamViewer.
This is the current architecture details:
- Cisco Nexus 9396PX Switch with 40G module
- 4 Dell PowerEdge R930 Servers (VMware ESXi7 hosts)
- NVME disks on each server
- 40 Gbps Mellanox NIC on ESXi7 hosts
- QSFP+ DAC cables to connect servers to switch
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Hi, I am Data Center Specialist having 10 years of experience in managing network and system administration. I am VMware VCP-DCV certified professional and also CCNP Certified. I have strong working experience on Vmwar Lagi
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Hi there, Based on the information you have provided, it seems like you have already taken some troubleshooting steps, such as setting up an FTP server and updating the MTU to 9000 on both hosts and VMs. However, you a Lagi
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