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Type 9

As explained in Acing the CCNA Exam: Volume 2 Advanced Networking and Security

A type 9 password is a Cisco IOS password stored using an scrypt-derived hash representation.

A type 9 password is a Cisco IOS password stored as an scrypt-derived hash representation. The algorithm identifier appears before the hash in the saved configuration. section 11.3.1

Configure an enable secret

Use `enable algorithm-type scrypt secret CiscoCCNA` in configuration mode. Verification displays `enable secret 9`, followed by the stored hash. section 11.3.1

SW1(config)# enable algorithm-type scrypt secret CiscoCCNA                    #1
SW1(config)# do show running-config | include enable
enable secret 9 $9$h.p1X8KVxbaILq$pNEykQjoAJbKCYfmBL9Hq8yPU/EqDGpoBkCIZ.s9GJA #2
#1 Configures an enable secret and hashes it with the scrypt algorithm
#2 The enable secret is saved as a hash, with the algorithm type indicated before the hash.

Shows the Cisco IOS command and running-configuration output, including the type 9 algorithm marker. section 11.3.1

How Acing the CCNA Exam: Volume 2 Advanced Networking and Security covers it

How deep it goes
Defines the hash representation and algorithm marker, but does not explain scrypt internals or attack resistance.
Examples
Uses an `enable algorithm-type scrypt secret` command and verifies the resulting `enable secret 9` line.
What you can do after
Operate/configure a Cisco IOS enable secret with scrypt and recognize its type 9 running-configuration representation.
How it connects
Connects password authentication, enable secrets, Cisco IOS configuration, and scrypt.
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Related concepts

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