I have switched network and on all access ports I've configured
spanning-tree portfast edge
When I enable
spanning-tree portfast networks
on trunk ports 1/0/51-52 every access port is blocked.
Do I have a loop?
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spanning-tree portfast network configures an interface for a neighbor network device (switch/bridge) - this likely isn't what you'd expect for
portfast mode since the port starts up in blocked state.
portfast network also uses UDLD/Bridge Assurance to protect against unidirectional links.
spanning-tree portfast edge is the "normal" portfast mode for end-node (access) ports. It skips the initial blocked state to provide L2 connectivity more quickly after "link up". Note that loop protection is temporarily compromised when a link starts up in the forwarding state, until the tree is converged.