Linux vacca.o2switch.net 4.18.0-553.123.2.lve.el8.x86_64 #1 SMP Thu May 7 23:17:13 UTC 2026 x86_64

//lib/firewalld/icmptypes/router-advertisement.xml

 <?xml version="1.0" encoding="utf-8"?>
<icmptype>
  <short>Router Advertisement</short>
  <description>This message is used by routers to periodically announce the IP address of a multicast interface.</description>
</icmptype>