IPv6 Router Advertisment flood causing 100% CPU usage
Description: When some evil on-link host starts flooding ff02::1 with ICMPv6 Router Advertisments, Illumos is using 100% CPU. This is caused by IPv6 suffix address generation of every received Router Advertisment.
Accept RAs only from gateway, turn off route discovery (will make SLAAC unusable), disable IPv6
Other operating systems discard RAs if threshold is reached. The example fix will be posted later.
How to reproduce:
1) spam ff02::1 with IPv6 RAs
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