The value of vRtrIfIcmp6OutErrors indicates the number of ICMP
messages which this interface did not send due to problems discovered
within ICMP such as a lack of buffers. This value should not include
errors discovered outside the ICMP layer such as the inability of
VRtr IPv6 to route the resultant datagram. In some implementations
there may be no types of error which contribute to this counter's
value.