These are the base configs I have used in my lab for all the Nexus switches. It’s enough for me to get SSH access and to use the API.
Spine1
hostname Spine1
feature nxapi
cfs eth distribute
no password strength-check
username admin password 5 $5$QDwTbb5f$OCKK.qhqrVz//MtyaZ4fqPLR9/i.f6D8vpD.fGooh9
2 role network-admin
ssh key rsa 2048
no ip domain-lookup
copp profile strict
snmp-server user admin network-admin auth md5 0xcdcfc90136e8b28ad99067d84b2b8a9b
priv 0xcdcfc90136e8b28ad99067d84b2b8a9b localizedkey
vlan 1
vrf context management
ip route 0.0.0.0/0 172.16.1.254
interface mgmt0
vrf member management
ip address 172.16.1.101/24
line console
line vty
Spine2
hostname Spine2
feature nxapi
cfs eth distribute
no password strength-check
username admin password 5 $5$gSLV65HY$bEJq/lmE6pRDXdgRGIvRRe7Ryi/PuIZbI2QDqN6aaJ
5 role network-admin
no ip domain-lookup
ip domain-name ansible.lab
crypto key param rsa label DC2.ansible.lab modulus 2048
copp profile strict
vlan 1
vrf context management
ip route 0.0.0.0/0 172.16.1.254
interface mgmt0
vrf member management
ip address 172.16.1.102/24
line console
line vty
Leaf1
hostname Leaf1
feature nxapi
no password strength-check
username admin password 5 $5$XBbGp.7c$6WfsTS5FsIDzhp.ks/H45DWg584mh/6g9WodoyR2vu
7 role network-admin
no ip domain-lookup
ip domain-name ansible.lab
crypto key param rsa label DC3.ansible.lab modulus 2048
copp profile strict
snmp-server user admin network-admin auth md5 0x09e9cc1f8de03ad855f6ebce0b990acf
priv 0x09e9cc1f8de03ad855f6ebce0b990acf localizedkey
vlan 1
vrf context management
ip route 0.0.0.0/0 172.16.1.254
interface mgmt0
vrf member management
ip address 172.16.1.103/24
line console
line vty
Leaf2
hostname Leaf2
feature nxapi
no password strength-check
username admin password 5 $5$I1zLnHIU$DPsGNg43XxL5rq2oiGOuUyzOxKmGlzOp2EOLEXOAF7
3 role network-admin
no ip domain-lookup
ip domain-name ansible.lab
crypto key param rsa label DC4.ansible.lab modulus 2048
copp profile strict
snmp-server user admin network-admin auth md5 0x3c1e293961b1a29af1c41ce25233ebfa
priv 0x3c1e293961b1a29af1c41ce25233ebfa localizedkey
vlan 1
vrf context management
ip route 0.0.0.0/0 172.16.1.254
interface mgmt0
vrf member management
ip address 172.16.1.104/24
line console
line vty