The Long and Winding Road wrote: > > ""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 > >
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