Please i need help suddenly we removed the internet uplink from the core switch and connected still showing in blocking mode and it is not going to forwarding mode
I'm not going to analyze 2500 lines of config.... some comments:
- you seem to have a wild mix of stp enabled and disabled for several vlans,
- you use telnet,
- you use static agg,
- you disable vlan 1 (which afaik has created issues in the past).
Do you really need all vlans to the DHCP? why not dhcp-relay?
Just to note: with flat mode you have one stp instance, that means only one tree. if you have a secondary port/path between two switches (even with different vlans) at the end only one path will be unblocked (regardless of which vlans will be on the port)