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Tristan B. Velloza Kildaire 2022-12-08 12:48:24 +02:00
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Radv
====
This document is for setting up radv on Bird 1.6.
# General syntax
You will want to add one of these to one of your Bird configuration files:
```
protocol radv
{
# Stuff goes here
}
```
## Advertising your prefix
If you would like to advertise your prefix to hosts on your LAN that have set their address acquisition for IPv6 to _'Automatic'_ such that they will assign themselves an address within that prefix then you will want to add a `prefix` block as so:
```
protocol radv
{
# Advertise your prefix
prefix fd40:ec65:5b4c::/64 {
# TODO: Add anything that needs to be in here
};
# Interfaces to run radv on
interface "eth0";
}
```
In the above example I am advertising a `/64` within my `/48`/ULA (`fd40:ec65:5b4c::/48`), `fd40:ec65:5b4c::/64`, and only on interface `eth0` will radv run.
## Advertising route(s)
You can advertise a default route, to `fd00::/8` or simply all routes in your router's routing table, to your hosts using the following:
### Advertising a single `fd00::/8`
TODO: Add this as I normally don't do this even though one should as it means less memory consumption and advertisement updates
### Advertising all known routes
This will advertise all the routes your Bird router knows (those in the `crxn` table) such that your, laptop for example, will add all of them to its routing table.
```
protocol radv
{
# Enable propagating of routes exported to us via radv to hosts
propagate routes yes;
# Export all your routes into the radv advertisement
export filter crxn6;
table crxn;
# Interface to run radv on - only eth0 (change to what you want)
interface "eth0" {
# Advertise your prefix
prefix fd40:ec65:5b4c::/64 {
# Defaults are fine
};
# Prevent advertising of default route
default lifetime 0;
};
}
```