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Adding docs for calico MTU #8724

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Mar 11, 2020
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Adding docs for calico MTU #8724

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a352164
adding docs for calico MTU
vgunapati Jul 30, 2019
61c68a4
Add link to official calico docs
rifelpet Mar 11, 2020
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14 changes: 14 additions & 0 deletions docs/networking.md
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Expand Up @@ -218,6 +218,20 @@ When you enable cross-subnet mode in kops, an addon controller ([k8s-ec2-srcdst]
will be deployed as a Pod (which will be scheduled on one of the masters) to facilitate the disabling of said source/destination address checks.
Only the masters have the IAM policy (`ec2:*`) to allow k8s-ec2-srcdst to execute `ec2:ModifyInstanceAttribute`.

### Configuring Calico MTU

The Calico MTU is configurable by editing the cluster and setting `mtu` option in the calico configuration.
AWS VPCs support jumbo frames, so on cluster creation kops sets the calico MTU to 8912 bytes (9001 minus overhead).
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For more details on Calico MTU please see the [Calico Docs](https://docs.projectcalico.org/networking/mtu#determine-mtu-size).

```
spec:
networking:
calico:
mtu: 8912
```

#### More information about Calico

For Calico specific documentation please visit the [Calico Docs](http://docs.projectcalico.org/latest/getting-started/kubernetes/).
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