The current behaviour for messages likeRFC 4443 specifies cases where certain packets, like those originating from local-scope addresses destined outside of the scope shouldn't be forwarded. The current practice is to drop them, send ICMPv6 message where appropriate, and log the message:
cannot forward src fe80:10::426:82ff:fe36:1d8, dst 2001:db8:db8::10, nxt
58, rcvif vlan5, outif vlan2 cannot forward src fe80:10::102a:79ff:fec7:61cf, dst
2001:db8:db8:a028::1, nxt 58, rcvif vlan45, outif vlan2
that are generated for packets that can't be forwarded is to log them.
At times,At times the volume of such messages can get very high, especially in environments that aim to implement BCP38 but are unable to enforce sane behaviour on the other side.
t get very high. Let's allow local admins to disable such messages on per vnet basis, keeping the current default (log).
Reported by: zarychtam@plan-b.pwste.edu.pl