Hi Ondrej, > On 6. Feb 2024, at 19:33, Ondrej Zajicek <santi...@crfreenet.org> wrote: >> >> I would like to use dynamic bgp (using a range for neighbour) with >> auto-configured LL IPv6 adresses. This doesn't work, of course, if I need >> to statically configure the source address, which I am forced to with the >> strict bind option. I am wondering, is this restriction really needed? > > Hi > > You are right, this is something that could be easily changed. Will look at > it.
That would be awesome :) >> In addition, it would be great if a strict bind option could be added for >> the babel protocol. > > Babel (and OSPF, RIP) already uses one socket per interface. Such socket > is not bound to specific IP address using bind(), but is bound to the > specific interface using setsockopt(SO_BINDTODEVICE), at least in Linux. > > We cannot use bind() with local IP address for multicast sockets, as they > would reject multicast packets (as they have different dst address as one > the socket is bound). > > Anyway, it should not be necessary. AFAIK, setups that require strict > bind in BGP should work out of the box in Babel. Or what specific setup > does not work for you? Oh, I think I was confused by the output of netstat. Using ss instead, I can see that bird correctly binds to just the devices specified in the configuration. I had previously assumed it was binding to all interfaces. Very sorry for this basic mistake. Thanks! Sebastian
