The value of vRtrIfIcmpOutErrors indicates the number of ICMPv4 messages which this interface did not send due to problems discovered within ICMPv4 such as a lack of buffers. This value should not include errors discovered outside the ICMPv4 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.