How can enable Inter VLAN routing in Cisco 3750 Switch without router?
3750 is L3 switch so its no big problem..
You need to ensure ip routing is enabled with command
Create vlans between you want to route
ip address 192.168.1.1 255.255.255.0
This IP address would be the default gateway for users in VLAN 10
ip address 192.168.2.1 255.255.255.0
This IP address would be the default gateway for users in VLAN 20
Now users in VLAN 10 can communicate with users in VLAN 20
Check this link for me info
Hope that helps rate if it does