Hi Kals, Path Segment can be used for identifying a LSP/SR Path in SR-MPLS networks.
With a path segment, use cases like passive Packet loss measurement, bidirectional path association can be done in SR-MPLS. You can read the document of Path Segment[1], which becomes a WG document recently. Basically, a Path Segment is inserted at the bottom of the label stack(as long as it can be read by the egress node). Also, for easier identifying an SRv6 SID list, SR candidate path, SR policy, an SRv6 Path Segment is proposed in [2]’ Hope my answers help you. [1]. https://tools.ietf.org/html/draft-ietf-spring-mpls-path-segment-00 [2]. https://tools.ietf.org/html/draft-li-spring-srv6-path-segment-00 Thanks, Cheng From: spring [mailto:[email protected]] On Behalf Of tech_kals Kals Sent: Friday, March 15, 2019 1:16 PM To: Stefano Previdi (sprevidi) <[email protected]>; Clarence Filsfils (cfilsfil) <[email protected]>; Ahmed Bashandy (bashandy) <[email protected]>; Les Ginsberg (ginsberg) <[email protected]>; Peter Psenak (ppsenak) <[email protected]>; [email protected] Subject: Re: [spring] How to support OAM on SR networks ? please ignore my previous email.. hi, can someone answer my question please ? thanks, kals On Fri, Mar 15, 2019 at 10:44 AM tech_kals Kals <[email protected]<mailto:[email protected]>> wrote: Hi, Can someone have a look at this issue ? thanks, __kals__ On Wed, Mar 13, 2019 at 10:49 AM tech_kals Kals <[email protected]<mailto:[email protected]>> wrote: Hi experts, Am so curious to know about how OAM can be supported on segment-routing networks ? I think, MPLS OAM is not possible with SR as network infrastructure doesn't have any LSP state. With SDN controller in place, do we really need traditional OAM ? Assume, SDN controller can identify the issue on the network, and it can configure an alternate path on the defected node. If SDN controller can do OAM, but at what cost (like BGP-LS) ? Thanks, __Kals__
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