MPLS TE

Fri Nov 4 16:09:44 UTC 2011

TE lab testing flushing out how TE works, configured a primary and backup
tunnel between PEs, both directions.
Primary is dynamic and backup is explicit, initially priorities were the
same, I then choose
to make one tunnel preferred over the other adjusting the priorities, I
choose the tunnel that was backup
to become primary to watch the traffic shift. (primary path was P1-P2-P3,
backup path P1-P3). However,
the traffic did not shift, a manual shut on a P3-P2 interface made the
traffic shift, reintroduction
kept the traffic on P1-P3,  then a "mpls traffic reoptimize" moved the
traffic back to P1-P2-P3.

Obviously the preferred MPLS tunnel is still  P1-P2-P3 even though I
configured "tunnel mpls traffic-eng priority 1 1"
on P1-P3 and "tunnel mpls traffic-eng priority 7 7" on P1-P2-P3. What am I
missing here?

My setup:

CE-----PE-----P1----------P3-------PE----CE
                     \          /
                      \        /
                          P2

Mike