Err_Msg_Size_Dst_Unreach_4.seq - check Message Processing Rules (ICMPv6 Destination Unreachable , link local address)
Host/Router
Err_Msg_Size_Dst_Unreach_4.seq [-tooloption ...] -p Err_Msg_Size_Dst_Unreach_4.def
When test starts, states of Neighbor Cache Entry for TN's addresses are reachable.
This test verifies that the message processing rule , Every ICMPv6 error message (type < 128) includes as much of the IPv6 offending (invoking) packet (the packet that caused the error) as will fit without making the error message packet exceed the minimum IPv6 MTU [IPv6].
TN NUT
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1. === UDP packet ===> port number is not used in NUT packet size is 1280 octets 2. << JUDGMENT >>
<=== ICMPv6 Destination Unreachable === Code is 4 packet size is 1280 octets
<< PASS >> NUT send ICMPv6 Destination Unreachable.
<< FAIL >> NUT do not send ICMPv6 Destination Unreachable.
perldoc V6evalTool