I have such network:
all client were located in inter three 510t switch ,they were be stacked together, I purchase a cisco 3550-48(emi) switch as the layer 3 switch to make the different vlan can communicate each other.the 3550_48 only as a routing switch ,all the port in 3550 only connect to the trunk group to 510t or the lan server.
how can i configue the 3550 to make the inter-vlan routing come true.
I Know how to make standard 802.1q trunk and virtual interface , but in 3550 only when the special ethernet port were added to a svi the correspond vlan can be actived, how can i do?
server ip address 10.12.82.0/26
other client 10.12.82.63/26---10.12.82.254/26
another ip network 172.16.1.0/24
thanks so much for the help
Let's say you want to route between VLAN1, VLAN2 and VLAN3.
Just configure a 802.1q trunk port and add IP addresses to interface VLAN1, interface VLAN2 and interface VLAN3.
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 1,2,3
switchport mode trunk
no ip address
ip address 10.12.82.1 255.255.255.192
ip address 10.12.82.63 255.255.255.192
ip address 172.16.1.1 255.255.255.0
Also check with "sh vlan" and "sh int g0/1 switchport" that your VLANs and trunk port are running correctly.