There is no specific questionnie available AFAIK.
However you may use folloinwg point while discussing.
1. What is the planned usage of switches? Where they are deploying the switch? Core/Access or Dist.
2. Is there any increase in traffic any 1 or 2 fold in coming 3 years?
3. How many ports is the customer looking per switch?
4. How many of the switches to be brough in to single VC?
5. Type of ports PoE or Non PoE
6. Any requirements of multi-gig ports?
7. Any specific throughput related requirements?
8. Uplink types? Speed?
9. Fiber - MM or SM?
10. Features sets required (i.e. IGMP, PIM, MSDP, OSPF, MAC Sec etc)
11. Any requirements of managing all the switches in single control plane?
12. Any requirements of network management tool
13. Does customer require RPSU?
14. Type of Power cords