-* Ensure that multicast works in general and a high package rates. This can be
- done with the `omping` tool. The final "%loss" number should be < 1%.
-+
-[source,bash]
-----
-omping -c 10000 -i 0.001 -F -q NODE1-IP NODE2-IP ...
-----
-
-* Ensure that multicast communication works over an extended period of time.
- This uncovers problems where IGMP snooping is activated on the network but
- no multicast querier is active. This test has a duration of around 10
- minutes.
-+
-[source,bash]
-----
-omping -c 600 -i 1 -q NODE1-IP NODE2-IP ...
-----
-
-Your network is not ready for clustering if any of these test fails. Recheck
-your network configuration. Especially switches are notorious for having
-multicast disabled by default or IGMP snooping enabled with no IGMP querier
-active.
-
-In smaller cluster its also an option to use unicast if you really cannot get
-multicast to work.
+CAUTION: You can still enable Multicast or legacy unicast by setting your
+transport to `udp` or `udpu` in your xref:pvecm_edit_corosync_conf[corosync.conf],
+but keep in mind that this will disable all cryptography and redundancy support.
+This is therefore not recommended.