italobusi
commented
2 weeks ago 2024-06-18 ACTN POI bi-weekly call
Reviewed slides in poi-failure-scenarios-00.pptx
The scenarios are assuming grey interfaces between the routers and the optical nodes
- [ ] @italobusi : add a note to the slides clarifying these are grey interfaces
Gabriele volounteered to provide an ASCII art version of the slides for inclusion in the draft
The issue can be cause by a failure on the router port, on the fiber between the router and the OTN node or on the OTN node port
The O-PNC and P-PNC should provide the MDSC all the information which is needeed to allow the MDSC to locate the root case of the failure on the link
Comment: change PE1 and PE2 to NE1 and NE2 to avoid misunderstanding that they are IP routers
The target is to reduce the amount of alarms sent by O-PNC and P-PNC to the MDSC by having some intelligent tool for root cause analysis. The challenge in this scenario is that the link is not under the control of a single PNC
This issue should be further investigated in details
In scenario 2, reporting the down status on the optical tunnel is sufficient to allow the MDSC to perform the multi-layer correlation and discover which IP links, LSPs and VPNs are affected by the failure
Jeff: the RCA is performed by the O-PNC and the result can be passed to the MDSC together with the information that the Optical tunnel is done. It could be useful to show on the MDSC which fiber is broken and the appoximate location of the failure on the fiber (as provided by the O-PNC)
- [ ] @prmanna @manzoro check whether the LOS alarm for grey interfaces on the routers is standardized
Initial set of slides analysis some failure scenarios relevant for POI assurance: poi-failure-scenarios-00.pptx