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BIRD: Added filters section

This commit is contained in:
Tristan B. Velloza Kildaire 2022-12-06 10:41:52 +02:00
parent 19d7538784
commit 8984c4925b
1 changed files with 14 additions and 0 deletions
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docs/routing/bird/bird.md
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@ -76,6 +76,20 @@ ipv6 table crxn;
You can choose any name for the table you want but you will just need to remember it such that you can refer to it later when it is needed. You can choose any name for the table you want but you will just need to remember it such that you can refer to it later when it is needed.
### Filters
We need to define a filter which will be used to filter out any incorrect routes we want to advertise _to_ the network but also prevents any incorrect routes that are being propagated _from_ any misconfigured BIRD instances on the network:
```
filter crxnFilter
{
if (net ~ fd00::/8) then accept;
reject;
}
```
TODO: Add a check about not installing RTD_UNREACHABLEs which babel will generate sometimes and which BIRD reportedly has undefined behaviour with
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