On Sun, 2 Feb 2020 at 17:22, Aaron Gould <aaron1 at gvtc.com> wrote: > is there a reason why ? I think you got a bunch of replies, but I'm not sure if the specific reason was addressed. TLV137 is part of LSP PDU and the neighbour is seen at one of the three possible Hello PDU, which does not yet contain TLV137. -- ++ytti