I have a customer whose two HP ProCurve 2910al PoE switches have failed. This was backing a VoIP deployment for a small call center. They are interested in replacement PoE switches, but there's a concern about the stack design.
This is primarily voice traffic, with PCs connected inline with phones running at 100Mbps. The replacement switches will be HP ProCurve 2920-48G PoE devices.
There will only be two switches here. There is no plan for growth in port count. The switch ports will be less than 50% utilized.
- For a two-switch setup, does it make sense to stack these switches via the stacking modules (additional $900 per-switch, plus stacking cables)?
- If I do stack, should this be done with a single link between stack members or a dual-cable link topology (shown below)?
- Or, given the cost impact of the stacking modules + interconnects, does it just make more sense to run a trunk between a few Gigabit ports on each device?