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docs: adding MTU note. #713

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May 12, 2017
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docs: adding MTU note. #713

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2 changes: 2 additions & 0 deletions Documentation/configuration.md
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Expand Up @@ -61,6 +61,8 @@ The following configuration illustrates the use of most options with `udp` backe
--version: print version and exit
```

MTU is calculated and set automatically by flannel. It then reports that value in `subnet.env`. This value cannot be changed.

## Environment variables

The command line options outlined above can also be specified via environment variables.
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