sreejith1986
Contributor
Contributor

NSX Load Balancer Inline vs One Arm Mode

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Hi All,

Need your help on NSX Load Balancer Inline vs One Arm Mode. I understand the difference between these 2 modes, but trying to get from NSX perspective.

From the list of features listed below for NSX Load Balancer, What are the features available only with an " inline mode of Load Balancer" or " One armed mode"

Logical Load Balancer

Thanks in Advance.

Regards,

Sreejith

1 Solution

Accepted Solutions
mauricioamorim
VMware Employee
VMware Employee

There are no feature differences between the modes. Inline and One Arm are just related to the difference in positioning the LB. One important thing to note though that is a direct consequence of this is that if you want to preserve client IPs (transparent) when sending requests to servers in the pool you have to use inline. Only this way the LB is inserted so the traffic passes through the LB on the way back. One arm mode uses SNAT to make traffic go through the LB on the way back and you have to use features like x-Forwarded-For to send the client IP information to server.

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RaymundoEC
VMware Employee
VMware Employee

Hello, the simple answer could be inline is for symmetric network services and one arm could be for suitable for simple deployments ie. in same logical wire and no modification on main EDGE config.

+vRay
mauricioamorim
VMware Employee
VMware Employee

There are no feature differences between the modes. Inline and One Arm are just related to the difference in positioning the LB. One important thing to note though that is a direct consequence of this is that if you want to preserve client IPs (transparent) when sending requests to servers in the pool you have to use inline. Only this way the LB is inserted so the traffic passes through the LB on the way back. One arm mode uses SNAT to make traffic go through the LB on the way back and you have to use features like x-Forwarded-For to send the client IP information to server.

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sreejith1986
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Thank you guys for your help

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