Handling MPLS-TP OAM Packets Targeted at Internal MIPs draft-farrel-mpls-tp-mip-mep-map-03 A. Farrel, H. Endo, R. Winter

MIP types (as per OAM fmwk) Per node MIPs Resides in an uspecified location within the node Per interface MIPs Resides on the interfaces Up-MIP & Down-MIP ------------------------ | | |----- -----| | MIP | | MIP | | | ---- | | ----->-| In |->-| XC |->-| Out |->---- | i/f | ---- | i/f | TTL expiry alone is not enough („addresses the node“)

Things we thought about... Use TTL field in GAL to address per-interface MIP GAL an PWs still in discussion Does not work for P2MP case to address one out of many interfaces One solution for all TP constructs (P2P, P2MP) is desirable -------------------------- | | | -----| | | MIP | | ->-| |->---- | | | Out | | | | i/f | | | -----| |----- | -----| | MIP | ---- | | MIP | | | | |- | | ----->-| In |->-| XC |--->-| Out |->---- | i/f | | |- | i/f | |----- ---- | -----| | | | MIP | | | | | | ->-| Out |->---- | | i/f |

Solution (LSP) No forwarding beyond this node ----------------- | Label=x | TTL=1 |--- |-----------------| | | GAL | TTL=m | | | ACH Type = OAM | | ----------------- | <------ ------------------ | Label=x | TTL=1 |--- |------------------| | | GAL | TTL=m | | | ACH Type = OAM | | |ACH TLV=in/out-MIP| | ------------------ | This is OAM Per node MIP/ In-MIP OAM type IN-MIP/ Out-MIP OAM recipient

Solution (PW) ------------------ | Label=x | TTL=1 |--- |------------------| | | PWACH Type = OAM | | ------------------ | <------ |ACH TLV=in/out-MIP| |

Future Open Issues Where should this work go Feedback welcome What if a packet with TTL=0 manages to leave a node? Where should this work go Stay where it is Move to another document (identifiers draft) Bin Feedback welcome Some received