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update bird docs for interconnection

This commit is contained in:
Marek Küthe 2023-01-30 16:21:29 +01:00
parent 841bc38d90
commit eb2dcb1fbd
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1 changed files with 3 additions and 3 deletions
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docs/routing/bird/bird.md
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@ -61,7 +61,7 @@ function is_valid_network() {
}
function reject_default_route() {
if (net = fd00::/8 || net = ::/0) then
if (net = ::/0) then
reject;
}
@ -158,11 +158,11 @@ The CRXN network uses IP addresses in the ULA range (`fd80::/8`). Here it is che
```
function reject_default_route() {
if (net = fd00::/8 || net = ::/0) then
if (net = ::/0) then
reject;
}
```
If a router is misconfigured, it may happen that a default route is exported. A default route is `::/0` in the Clearnet and `fd00::/8` in the ULA range. If you propagate this, you say that you can reach any address. However, if an address is unknown, you want to get an ICMP unreachable or an ICMP No route. If you now import a default route, you would export the request to the peer that sends the default route, which would result in not getting an ICMP message.
If a router is misconfigured, it may happen that a default route is exported. A default route is `::/0` in the Clearnet and `fd00::/8` in the ULA range. If you propagate this, you say that you can reach any address. However, if an address is unknown, you want to get an ICMP unreachable or an ICMP No route. If you now import a default route, you would export the request to the peer that sends the default route, which would result in not getting an ICMP message. An exception is the ULA default route `fd00::/8`. This is used as a route to dn42.
Next we build the import and export filters: