[c-nsp] auto-backup tunnels

[Oliver Boehmer (oboehmer)]

Aleksey,

> So, as it could be seen from the config above, both NHOP and NNHOP
> backup tunnels are setup. But when I crash the network like to
shutdown
> R2 and R3 I can see that, for example, R1 builds a backup tunnel from
R1
> to R4 which is neither NHOP nor NNHOP tunnel. So here is my question
why
> it happens? Is it expected behaviour or not?

It is not expected, the PLR should only build NHOP and NNHOP.. If there
is indeed a tunnel from R1 to R4 in your topology, something went wrong,
or your topology is indeed different.
Can you check if this tunnel protects any LSP?

	oli