On 05.04.20 23:08, Fabiano D'Agostino wrote:
Good evening,
could someone explain me the meaning of these lines?
function bgp_out(int peeras)
{
if ! (source = RTS_BGP ) then return false;
if peeras > 65535 then return true; ### communities do not support AS32
if (0,peeras) ~ bgp_community then return false;
if (myas,peeras) ~ bgp_community then return true;
if (0, myas) ~ bgp_community then return false;
return true;
}
Thanks,
Fabiano
Morning,
I can not cover the whole section but as a start...
* if the route does not come from BGP then false (routing table source?)
* if the remote AS Number is greater 65535 (16 Bit) then "just" return
true (see AS 32 Bit Numbers, and the non-support of older
devices/implementations)
* For the next 3 I'm not 100% sure how to read but I found
https://bird-users.network.narkive.com/3uDbo6H9/any-ix-willing-to-share-their-config
```
0:XXXXX - Do not announce route to peer XXXXX
0:MyASN - Do not announce route to all peers
MyASN:XXXXX - Announce route to peer XXXXX only
MyASN:MyASN - Announce routes to all peers. This community is
automatically added to all routes that are not
tagged with any of MyASN:XXXXX communities.
```
Maybe this helps a little bit.
Bernd
