We discussed the following interpretation request in the Interworking meeting, this morning, and came up with this resolution: STANDARD: IEEE Std. 802.1ag-2007 SUBSECTION: 20.3.2 Linktrace Message reception, forwarding, and replying APPLICABLE CONDITIONS: If an Up MEP, as shown in Figure 20-13, case 8, transmits a Linktrace, the Linktrace Responder should see it, decrement the TTL field, respond (to the MEP) and forward the LTM out the appropriate port, as shown in that diagram. However, according to point f) of 20.3.2 on page 144, the LTM would not be forwarded; it must have been received by an MHF in order to be forwarded. The case of an LTM generated by an internal Up MEP seems to have not been taken into account when writing point f). Clearly, an LTM generated by an Up MEP should be forwarded. Point f) now reads: f) The LTM was received by an MHF, not a MEP; This should perhaps be changed to read: f) The LTM was received via an MHF Linktrace SAP or a MEP LTI SAP, and not a MEP Linktrace SAP; RESOLUTION: The document is in error; we agree that an LTM generated by an Up MEP should be forwarded. The error will be addressed in the next revision of IEEE Std 802.1Q.