1. Diagnostic tool-test for MPLS transport profile
draft-flh-mpls-tp-oam-diagnostic-test-00
Feng Huang
Lieven Levrau
Alcatel Lucent
Han Li
China Mobile
Ruiquan Jing
China Telecom
76th IETF – Hiroshima, Japan, November 2009

2. Authors/Contributors
Feng Huang (Alcatel-lucent Shanghai Bell)
Lieven Levrau (Alcatel Lucent)
Han Li (China Mobile)
Ruiquan Jing (China Telecom)
76th IETF – Hiroshima, Japan, November 2009

3. What’s diagnostic tools
Diagnostic tools are used for diagnose error and performance measurement, which including :
Loopback-looping the traffic at an Intermediate Point or End point back to the originating end Point-loopback.
Bandwidth or throughput estimating or verification
Frame loss measurement
Frame delay measurement
76th IETF – Hiroshima, Japan, November 2009

4. What’s diagnostic tools -TST
Diagnostic tool-TST is used for verifying throughput one-way or two way on-demand in-service or out-of-service.
Throughput is a capacity in terms of line rate; it is the amount of bits observed passing a point during a time interval.
76th IETF – Hiroshima, Japan, November 2009

5. 76th IETF – Hiroshima, Japan, November 2009
Out of service test
Client data traffic is disrupted in the diagnosed entity by LCK function.
The source MEP transmits TST packets to the target MEP ,and gradually increase TST packet bandwidth until hitting a threshold TST packet traffic loss rate.
76th IETF – Hiroshima, Japan, November 2009

6. 76th IETF – Hiroshima, Japan, November 2009
In service test
Used for:
Especially emulation working service in protection path when 1:1 protection in order to verify protection path or
Monitor or verify service bandwidth in line
Data traffic is not disrupted
The packets with MPLS-TP test information are transmitted such that a limited part of the service bandwidth is utilized. This rate and QoS of transmission for TST packets is pre- determined for in-service MPLS-TP test function. The maximum rate at which TST packets can be sent without adversely impacting the data traffic for an in-service is should be calculated carefully.
Observe TST packet that are transmitted, delivered, and or rejected on a PW, LSP or Section. When detect threshold of packet loss rate, calculated the throughput.
76th IETF – Hiroshima, Japan, November 2009

7. 76th IETF – Hiroshima, Japan, November 2009
TST frame
TST frame including:
Performance counter such as send time, received time, send packets, received packets.
TST TLV such as test pattern such as PBRS, RFC2544
76th IETF – Hiroshima, Japan, November 2009

8. 76th IETF – Hiroshima, Japan, November 2009
Discussion
Is there need throughput test tool (TST) for MPLS-TP?
In service test without impacting data traffic in details, how to set up test packet’s QoS?
76th IETF – Hiroshima, Japan, November 2009

9. 76th IETF – Hiroshima, Japan, November 2009
Next Steps
Update it to be version 01 according comments
76th IETF – Hiroshima, Japan, November 2009