Ive got several buildings connected by fibre optic. Each building is connected to the fibre optic by a layer 3 switch. There are several VLANS connected to these switches to form different departments of the business.
Is it true that without a router behind the layer 3 switch, a vlan in building 1 wont be able to communicate with another vlan in building 1?
Can't layer 3 switches route the information between VLANS?
thanks in advance
2007-01-09 04:32:27 · 3 answers · asked by Alex M 1 in Computers & Internet ➔ Computer Networking
VLANs operate at Layer 2 of the IP model. Regardless of initial or eventual physical location, each computer in the VLAN can access the same data. Those Layer 3 switches need to be configured correctly to tag or untag information for different VLANs. Ports on those switches can belong to only one untagged VLAN but may belong to multiple tagged VLANs. You may need a device that handles VLAN membership which take multiple VLANS and push them through the same pipe without them touching one another. You can't do that with limited VLAN switches that are port based only (not 802.1q).
Hope that helped.
2007-01-09 05:33:26 · answer #1 · answered by Angie 5 · 0⤊ 1⤋
VLAN's communicate with each other via IP routing. doesn't matter if it's with a traditional IP router or an Layer 3 switch with IP routing enabled...
2007-01-09 04:42:38 · answer #2 · answered by lv_consultant 7 · 1⤊ 0⤋
an LAN can work withput a router. if u want to connect to internet then u would certainly need a router.
LAN's can be connected to form a network without a router also.it depends upon the design.againd read first line.
2007-01-09 04:59:08 · answer #3 · answered by dhamas 3 · 0⤊ 2⤋