""Priscilla Oppenheimer"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > The router is probably in the same rack as the switch. The cable is probaby > very short. The fact that electrons have to travel across it is not a > consideration. They travel at about 2/3 the speed of light.
I was being half facetious while referring to the fact that router on a stick has to do things with the L2 headers as it forwards, while an intergrated L3 switch does not. Along with the CPU interrupt times and issues. Agreed - this "might" be a factor only on high end equipment passing zillions of packets and frames. > > Priscilla > > The Long and Winding Road wrote: > > > > wrote in message > > [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > > > Dear All, > > > > > > Need your advice on the following scenario: > > > > > > I am using VLANs to provide the partitons for the traffic > > (voice and data) > > > from various departments. In order to provide routing between > > various > > > VLANs, I would need a router to do so. > > > > > > Please advice if there are any difference in the > > functionalities etc. if I > > > use > > > > > > 1) a L3 switch for routing between VLANs, > > > 2) a L2 switch followed by a router for routing between VLANs. > > > > > > > 1) define "functionality" > > > > 2) define "difference" > > > > in either case, the net result is the same. for inter-vlan > > forwarding on the > > same box, the integrated L3 switch will be faster because a) > > electrons don't > > have to travel as far and b) the stripping and rewriting of L2 > > headers can > > be more efficiently done ( if it is necessary at all ) on the > > integrated L3 > > switch. > > > > once in a while this group has entertained the discussion of > > the relative > > merits of L3 switches versus routers. it occurs to me that at > > the electron > > level integrated L3 switching is indeed superior to routing, or > > at least > > inter-vlan routing versus router on a stick. Howard - care to > > offer your > > insight here? I'm talking about things as they happen at the EE > > level. > > Router on a stick has to be "slower" and "less efficient" than > > integrated L3 > > for inter-vlan routing. OTOH, I don't see any advantage for an > > integrated L3 > > switch acting solely as a router, forwarding traffic from > > itself to another > > router down the wire, all other things being equal. > > > > > > > > > > > > > Thanks in advance! > > > > > > Maurice Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=62206&t=62166 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
