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add hint to iso osi modell 

Signed-off-by: Marek Küthe <m.k@mk16.de>
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Marek Küthe 2023-01-03 11:45:38 +01:00
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docs/tunneling/iptunnel.md
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@ -60,9 +60,12 @@ GRETAP tunnels operate on layer 2 of the ISO/OSI model. To use a GRETAP tunnel,
## Simple Internet Transition (SIT)
SIT tunnels can be created in the same way as GRE tunnels. The difference is that you write `type sit` instead of `type gre`. SIT tunnels are designed to encapsulate IPv6 packets, so a SIT tunnel must be established over IPv4.
SIT tunnels on layer 3 of the ISO/OSI model.
## VXLAN
VXLAN tunnels on layer 2 of the ISO/OSI model.
For VXLAN the type is changed to `vxlan`. Furthermore there are two additional parameters:
```
ip link add <interface> type vxlan id <vni> remote <remote> local <local> dstport <dstport>