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Add config documentation for VXLAN tunnels

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Pim van Pelt
2022-04-03 14:44:50 +00:00
parent 720f581e47
commit dc3fb57274
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docs/config-guide.md
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@ -156,4 +156,35 @@ bondethernets:
### VXLAN Tunnels
VXLAN Tunnels are required to be named `vxlan_tunnelN` (note the underscore), where N in
[0,2G). The configuration allows the following fields:
* ***description***: A string, no longer than 64 characters, and excluding the single quote '
and double quote ". This string is currently not used anywhere, and serves for enduser
documentation purposes.
* ***local***: A required IPv4 or IPv6 address for our (source) side of the tunnel.
* ***remote***: A required IPv4 or IPv6 address for their (destination) side of the tunnel.
* ***vni***: A _Virtual Network Indentifier_, a required integer number between [1,16M).
Local and Remote sides of the tunnel MUST have the same address family.
*Caveat*: VXLAN tunnels are currently only possible as unicast (src/dst), with static source
and destination ports (4789), and with a `decap-next` of L2. Also, VNIs must be globally unique.
In a future release of `vppcfg`, these fields will be configurable, and VNI reuses will be
allowed between different dst endpoints.
Examples:
```
vxlan_tunnels:
vxlan_tunnel0:
description: "Some IPv6 VXLAN tunnel"
local: 2001:db8::1
remote: 2001:db8::2
vni: 100
vxlan_tunnel1:
local: 192.0.2.1
remote: 192.0.2.2
vni: 101
```
### Interfaces