VLAN Trunking 1

[viper77]

Is it possible for example VLAN1 on switch1 to communicate with VLAN1 on another switch2 with both switches trunk using VTP. Or do I need a router? This has always confuse me.

I thought in order for 2 different VLANS to communicate with one another for example VLAN1 on SWITCH1 wants to talk to VLAN2 on SWITCH2 you would need a router but if VLAN1 on SWITCH1 wants to talk to VLAN1 on SWITCH2 you don’t need a router as long as the 2 are trunk. Can some one please clear this up.

 

[pmesjar]

Trunk connection is for carrying traffic from at least two VLANs accross one physical connection. If you have just one VLAN, communication does not require any trunking.

Peter Mesjar
CCNP, A+ certified
pmesjar@centrum.sk

"The only true wisdom is in knowing you know nothing.

 

[vipergg]

Your understanding is correct , if you trunk a vlan across a link to another switch you will be able to communicate with clients in the same vlan . you can run 20 vlans across that trunk and if you are talking to clients that are in the same vlan they will be able to talk to each other . If you need to talk between vlans then yes you do need a layer 3 routing device .