Thoughts on breaking a design to accomodate a physical barrier.

Hey all -

Routed-access design. Phase 1 calls for a 3 switch triangle (collapsed-core, two access) using 10g OM3 backbone - lots of video being pushed around the campus, live streams and what not. Two legs of this triangle are not a problem but the third leg is obstructed and a cable run straight across 'as the crow flies' is not possible.

Only options I see:

-cable run the third leg down the path used for legs 1 and 2.

-break the design and don't run the third leg.

-Running the cable would require right around double that of legs 1 and 2.

-Breaking the design means I lose: fault tolerance, scalability - Anything else?

A planned Phase 2 will add 2 more switches - end result: collapsed-core with four access. There is limited projected growth after this.

How much pain will be had if we choose to ignore the third leg?