2018-07-31 2018-10-30 Specification Required Unassigned 0x00 NO_ERROR No error 0x01 WRONG_IF Mtrace2 Request arrived on an interface to which this router would not forward for the specified group towards the source or RP. 0x02 PRUNE_SENT This router has sent a prune upstream which applies to the source and group in the Mtrace2 Request. 0x03 PRUNE_RCVD This router has stopped forwarding for this source and group in response to a request from the downstream router. 0x04 SCOPED The group is subject to administrative scoping at this router. 0x05 NO_ROUTE This router has no route for the source or group and no way to determine a potential route. 0x06 WRONG_LAST_HOP This router is not the proper LHR. 0x07 NOT_FORWARDING This router is not forwarding this source and group out the outgoing interface for an unspecified reason. 0x08 REACHED_RP Reached the Rendezvous Point. 0x09 RPF_IF Mtrace2 Request arrived on the expected RPF interface for this source and group. 0x0A NO_MULTICAST Mtrace2 Request arrived on an interface which is not enabled for multicast. 0x0B INFO_HIDDEN One or more hops have been hidden from this trace. 0x0C REACHED_GW Mtrace2 Request arrived on a gateway (e.g., a NAT or firewall) that hides the information between this router and the Mtrace2 client. 0x0D UNKNOWN_QUERY A non-transitive Extended Query Type was received by a router which does not support the type. 0x0E-0x7F Unassigned 0x80 FATAL_ERROR A fatal error is one where the router may know the upstream router but cannot forward the message to it. 0x81 NO_SPACE There was not enough room to insert another Standard Response Block in the packet. 0x82 ADMIN_PROHIB Mtrace2 is administratively prohibited. 0x83-0xFF Unassigned Specification Required Unassigned 0x00 Reserved 0x01 Mtrace2 Query 0x02 Mtrace2 Request 0x03 Mtrace2 Reply 0x04 Mtrace2 Standard Response Block 0x05 Mtrace2 Augmented Response Block 0x06 Mtrace2 Extended Query Block 0x07-0xFF Unassigned