Hi, folks. I’m activating the NANOG brain trust here because I’ve exhausted (and am exhausted from) efforts so far to seal the deal on what is probably simple stuff to y’all. TL;DR: I think I’m missing some specific glue to make my backbone data plane forward CE IPv4 traffic into a simple PE-to-PE node SID path. I’ve tried both SRv6 steering IPv4 encap in IPv6 GRE (due to lack of End.DX4 or End.DT4) and SR-MPLS. Anonymized and scrubbed topologies and configurations attached — Plan E for SRv6, Plan F* for SR-MPLS. Using Junos 23.4R2-S5.6, looking for the magic “you forgot this part” for either way (though SRv6 + IPv6 GRE preferred). Details: I have a video partner with CEs at two sites on my internal WAN using SMPTE 2022-7 to generate two identical video streams. I receive those on physically diverse links from his CEs to my PEs, then ideally carry them over diverse paths, which I need TE to do. A path of node SIDs satisfies (for now) proof that I can do this (adjacency SIDs later). Everything I’m doing passes Junos CLI syntax checking and “commit check” semantics, but when the change is complete, neither I nor my partner sees this work doing ... anything. I should see his video test patterns having a significant bump in the “blue” path transcontinental end-to-end latency because I’m heading towards Canada then heading towards Mexico on my way between coasts. The “red” path is almost a straight shot. My PEs do not run BGP, so I need to do all of this entirely within IS-IS. I believe my use of “color” in these configurations is a distraction that sounds like it should work but is misguided being a BGP knob. I believe I’ve identified that IPv6 GRE on Junos will only use inet6.0 and will not get steered by the SID path in other tables despite my trying mechanisms like resolution-ribs. I prefer to have this work with SRv6 because I’m greenfield and it’s kind of a moonshot. But at this point I’ll defer to something more tried-and-true like SR-MPLS just to get things working. Direct responses are great, public responses are cool if there are helpful learnings for others where my self-esteem in this space is fragile but sacrificial :-) -dp * Yes, “F” now stands for what you think it does