Nikolay,

I am no expert on posting youtube.(hence button +18).

The video is a demonstration of MPLS (multi path label switching) style of Network , using the developer version of Visio (professional).

From a transmission/network/bandwidth perspective the following abstract applies:

Evolution of topology PDH -> SDH-> MPLS.

PDH linear by nature, its bandwidth could be readily drawn on paper.

SDH non linear, its bandwidth is "static" and configurable. When a link is impacted, alternate routing paths pre configured by human hand.

MPLS non linear , its bandwidth is dynamic . Alternate bandwidth is automatically configured using an algorithm based upon shortest path(least number of nodes).

The algorithm is very similar to Dijkstra's shortest path algorithm.

Regards the image interpretation.

the circles ostensibly represent Routers, the lines represent the physical connections between the routers. ( transmission links)

the numbers on the line represent how much bandwidth is spare on the link.

regards the audience.

a demonstration to show the possibilities, using the Visio platform, issues of MPLS bandwidth design and control.

any feedback appreciated.

regards

Cliff A.