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still good reasons to choose IS-IS for greenfield :) hell, they took IS-IS and did TRILL with it for DC (rip TRILL).

but yeah, I saw one piece of SONET crap hanging off a ctunnel that spoke CLNP back in maybe 2012 or 2013? haven't seen much of it, but still learned the ctunnel stuff back in '09 because it still could occasionally rear its head.

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Worked for an old ISP in 2012 (it started when the state owned telco was privatized). Also had the ctunnel to manage old SONET crap, still had modem pools running, racks full of purple Sun machines still running, vax, hpux, as400, etc. Even the old smsc that was 5 racks of dec servers was still there, was never removed as they didn't need the space because modern equipment was using all the available power anyway (was also in a mountain so a bit of a hassle to remove).

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