[j-nsp] GRE tunnels on a QFX10002-60C

[Jon Lewis]

I've got an open support case with Juniper, but as it's gotten nowhere 
since opening it last night, I figured I'd try some crowdsourcing :)

Does anyone have working GRE tunnels terminated to a QFX10002-60C?  We've 
got a GRE tunnel mesh of several dozen sites, using a mix of Arista 7280s 
and Juniper QFX5120s to terminate the tunnels.  We're trying to add a 
couple of new sites to the mesh where the tunnels will live on 
QFX10002-60C.  What we're seeing with the QFX10002-60C is, locally 
generated traffic (i.e. ping from the QFX10002-60C to an IP reachable via 
a gr-0/0/0.XX interface) works, but traffic from another device in the POP 
that needs to transit a QFX10002-60C which should then route the traffic 
via a gr-0/0/0.XX interface is dropped.

I'm trying to figure out if there's something special about the 
QFX10002-60C that requires some config knob not needed on QFX5120 or if 
GRE is just broken on the QFX10002-60C.  The QFX10002-60C are running 
20.4R3.8.

----------------------------------------------------------------------
  Jon Lewis, MCP :)           |  I route
  StackPath, Sr. Neteng       |  therefore you are
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