>Hi > >OK I'll bite... > >Yes there is a difference. It gets a little convoluted, but there is a >difference. > >L3 switching: Think of a L3 switch as a multi port router that operates at >wire speed. The 2948G-L3 is an example. It is just a 50 port Ethernet >router. So L3 switching is routing traffic at wire speeds. You could use one >of these to route between VLANs, or route between networks. > >Inter-VLAN routing: This is a technique, technology that is only used to >route traffic from one VLAN to other VLAN(s). It generally takes place at >wire speeds inside a Cat switch with a L3 switch option, but is often see >with routers that do not work at wire speeds. > >So the bottom line... think of a L3 switch as a device, and Inter-VLAN >routing as a technology. > >HTH >-- >John Hardman CCNP MCSE Your bottom line is a nice way to distinguish, one I don't usually use but one that makes sense. My biggest problem with some of these terms is that they really don't have any technical meaning. They may have product family connotations, but they are often no more than salesspeak. Routing is routing, whether inter-VLAN or not. Routing is relaying based on layer 3 information. There are separate control planes (path determination) and forwarding planes (packet forwarding) in any router of reasonable performance. Layer 3 switches and routers are different names for a device that does the same thing. It might be argued that an inter-VLAN switch/router has to understand VLAN trunking protocols as well as layer 3 headers. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=6125&t=6125 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
