You are setting up an IS-IS IGP network, but the IS-IS adjacencies are not establishing.
In this scenario, which two reasons could cause this issue?
Junos IS-IS hello PDUs are padded to 1492 bytes, so the connecting interface must support at least that MTU for adjacency formation. The loopback interface (lo0) must also be included in the IS-IS configuration because it provides the router’s NET; IS-IS does not function correctly when it is omitted. Level 2 routers do not need matching area addresses, and the IPv4 subnet prefix length is not an IS-IS adjacency requirement.
lo0
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