Add OpenBSD-specific information
@@ -40,6 +40,28 @@ multicast routing support, including PIM support. See your respective
documentation, or consult the web for help!
+OpenBSD
+-------
+
+PIM support was removed from the multicast stack in OpenBSD 6.1 (https://marc.info/?l=openbsd-cvs&m=148240469327159)
+
+For instructions on installing pimd on OpenBSD 6.0, you can use the HOWTO page at http://troglobit.com/howto-run-pimd-on-openbsd.html, taking into account the following:
+
+1. Additional prerequisite: The MROUTING option is enabled by default in the kernel, but the PIM option is not. In /src/sys/conf/GENERIC, uncomment the following line and rebuild the kernel:
+
+ ```
+ options PIM # Enable for pimd
+ ```
+
+2. Change: the multicast configuration option in /etc/rc.conf.local now only consists of one line instead of the two mentioned in the HOWTO document:
+
+ ```
+ # Multicast routing configuration
+ # Please look at netstart(8) for a detailed description if you change these
+ multicast=YES # Reject IPv4 multicast packets by default
+ ```
+
+
Cross Compiling
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