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

2. 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“)

3. 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 |

4. 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

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

6. 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