We are forwarding all traffic onto TE tunnels. the issue we are having is that we have redundant routers at every edge on the network, running VRRP for gateway protection.
We build tunnels from the BGP edge (also redundant) to each edge device that is 2 x 2 = 4 tunnels in each direction.
Now we setup static routes on the bgp edge and forward the traffic onto a tunnel, with a second tunnel as backup gateway. we have "disable running check=no" set on the tunnels.
if one of the edge routers dies for any reason (bgp or customer edge) it can take between 120 - 165 seconds for the other end to realize the tunnel is no longer live.
I read another post that said this timeout is determined by refresh-time * k-factor, where can i change these settings and what is the absolute lowest these values should be set to in order to have a stable setup that will survive normal packet loss?