In the following example, a bidirectional LSPs is configured between Dut-A and Dut-C.
Dut- A ----------------- Dut-B ------------------ Dut-C
(leaf) (bud) (root)
The IGP shortcut behavior is as follows:
In the upstream direction, if ldp-over-rsvp on the LSP is disabled from Dut-A to Dut-C (ldp-over-rsvp exclude), the FEC is signaled upwards using the LSP. This is because it is a shortcut-based LSP and the ldp-over-rsvp disable configuration has no effect on it.
In the downstream direction, if ldp-over-rsvp on the LSP is disabled from Dut-C to Dut-A, the bindings are removed on Dut-C even if the tunnel is a shortcut tunnel.