sullinsm
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Contributor

Throughput on VM's (network devices) passing data on the same vDs, port group and VLAN

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Hello,

If I am asking questions in the wrong area, please direct me to the appropriate forum.

My questions relates to throughput with Cisco devices.

Question: If I have two VM's (network devices) passing data on the same vDs, port group and VLAN is the throughput limited by the license on the VM's which is 5GB.

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Texiwill
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Hello,

It is a little more complext than that.....

-- On the same VDS in the same host:  Virtual NIC in use (based on Guest OS Driver in use)

-- On the same VDS but different host (non-blade/UCS)/Different VDS: Network Driver in use, Physical NIC in use, Physical Switch in Use

-- On the same VDS but different host (blade/UCS)/Different VDS: Network Driver in use (Virtual NIC), Physical NIC in use, Physical Virtual Switch in use and its assigned speed, Physical Swithc in Use

Application: It may only be able to send X Gbps due to coding

Virtual NIC: E1000 (1Gbps), VMXNET3 (10Gbps)

Virtual Switch: not part of the decision there are no limits

Physical Virtual Switch: HPE Flex for example can be assigned an upper limit on speed per switch port, You may be able to do this with other similar systems not 100% sure.

Physical Switch: whatever the port speed is set to

If you are seeing a max of 5Gbps, I would investigate the entire networking stack virtual and physical as well as the appication in use.

Best regards,

--
Edward L. Haletky
vExpert XIV: 2009-2022,
VMTN Community Moderator
vSphere Upgrade Saga: https://www.astroarch.com/blogs
GitHub Repo: https://github.com/Texiwill

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rcporto
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What kind of license you are referring? Unless I'm missing something, if both VMs are on the same host, vDS, port group and VLAN, the throughput will be limited by the virtua network adapter in use on VMs, if using E1000, it will be 1Gbps, if using VMXNET3, the throughput will be 10Gbps. But if VMs are on different hosts, the bandwidth will be limited by the speed of host physical network cards used as uplink by your vDS.

---

Richardson Porto
Senior Infrastructure Specialist
LinkedIn: http://linkedin.com/in/richardsonporto
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Texiwill
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Leadership

Hello,

It is a little more complext than that.....

-- On the same VDS in the same host:  Virtual NIC in use (based on Guest OS Driver in use)

-- On the same VDS but different host (non-blade/UCS)/Different VDS: Network Driver in use, Physical NIC in use, Physical Switch in Use

-- On the same VDS but different host (blade/UCS)/Different VDS: Network Driver in use (Virtual NIC), Physical NIC in use, Physical Virtual Switch in use and its assigned speed, Physical Swithc in Use

Application: It may only be able to send X Gbps due to coding

Virtual NIC: E1000 (1Gbps), VMXNET3 (10Gbps)

Virtual Switch: not part of the decision there are no limits

Physical Virtual Switch: HPE Flex for example can be assigned an upper limit on speed per switch port, You may be able to do this with other similar systems not 100% sure.

Physical Switch: whatever the port speed is set to

If you are seeing a max of 5Gbps, I would investigate the entire networking stack virtual and physical as well as the appication in use.

Best regards,

--
Edward L. Haletky
vExpert XIV: 2009-2022,
VMTN Community Moderator
vSphere Upgrade Saga: https://www.astroarch.com/blogs
GitHub Repo: https://github.com/Texiwill
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sullinsm
Contributor
Contributor

Hello Rich,

Thanks for the input. To answer your question, Cisco sells it license base on features for some products. For example you can buy a 1Gbps, 2Gbps, 5Gbps and 10Gbps license for the ASAv.

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sullinsm
Contributor
Contributor

Thanks for the reply. The application maybe the issue.

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