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New Member

VLANs Communications

Anyone please help out how do I enable the communications among VLANs such as "File Sharing", "Pinging" , etc ?

Is it true that after I trunk those VLANs to a Layer 3 switch by either "ISL" or "dot1q" then those VLANs can communicate each other for what were stated above ?

If I am using few stacked 2950 switches and with fiber backbone to the 3550, in command wise, how do I trunk those 2950 to the 3550 ?

Please help out.

  • Other Network Infrastructure Subjects
Cisco Employee

Re: VLANs Communications

If you have a router with Fastethernet interface, plug it into the switche and configure the port on switch as trunk port. Then on the router, create sub-interfaces on this fastethernet and configure ISL encapsulation with appropriate VLAN numbers and IP address.

This is called inter-VLAN routing.

configuring inter-VLAN routing using an eternal router.



New Member

Re: VLANs Communications

Instead of using a router, can I use a Layer 3 switch (e.g. a 3550) to implement the VLAN communications ?

New Member

Re: VLANs Communications

Yes, just trunk those VLANs from the access switches to a 3550 and give the necessary IP addresses to VLAN interfaces in the 3550.