The following info was taken from page 242 of the user guide: [URL] "Dell Networking OS provides 40000 entries that can be divided between leased addresses and excluded addresses. By extension, the maximum number of pools you can configure depends on the subnet mask that you give to each pool. For example, if all pools were configured for a /24 mask, the total would be 40000/253 (approximately 158). If the subnet is increased, more pools can be configured. The maximum subnet that can be configured for a single pool is /17. Dell Networking OS displays an error message for configurations that exceed the allocated memory." Hopefully this helps answer your question. 
hello What is the maximum pool number on the S3100 serial switches and the maximum number of addresses that the dhcp server can provide. regards
S3100 and DHCP limits