Good info Rubens. Thanks! On Thu, Apr 15, 2010 at 11:40 PM, Rubens Kuhl <rube...@gmail.com> wrote: > On Thu, Apr 15, 2010 at 10:34 PM, RickG <rgunder...@gmail.com> wrote: >> Thats leads me to a question. I note RB's website specs for the 450G says: >> Actual tested throughput Ether1 <-> Ether2 = 1Gbps > > For large-large-large packets, as these boards are pps limited. > >> Ether2 <-> Ether3 = 650Mbps 1Gbps throughput on ports 1-2 > > That's because Ether 2 to 5 are connected to a single gigabit CPU > port. It should read 500 Mbps and not 650 Mbps, as 650 Mbps would > imply a 1.3Gbps port. > > >> Is the 750 the same? > > THe RB750 don't use the RB450G and RB750G switch chip. > (http://wiki.mikrotik.com/wiki/Manual:Switch_Chip_Features) > >> Also, what does "optional Switch Chip functionality for wire speed >> Gigabit throughput." mean? > > It means if you configure switching instead of CPU-forwarding on these > ports, they will get wire speed throughput. But it will be limited > layer-2 and may be tag insertion/removal, some L3/L4 ACLs if they are > small. > >> This is interesting as well: >> "Comparing to RB750, the G version adds not only Gigabit capable ports, but >> a new 680MHz Atheros 7161 CPU for increased throughput. Up to 580Mbps >> throughout with larger packets, and up to 91500pps with small packets!" > > According to the page above RB750G doesn't have the "all-port-switch" > option of RB450G, which suggests it only has one gigabit connection to > the CPU. The fact that all RB750G ports have the same MTU > (http://wiki.mikrotik.com/wiki/Manual:Maximum_Transmission_Unit_on_RouterBoards), > when RB450G Ether1 has a slightly larger MTU than RB450G Ether2-5 > suggests that as well. > > > Rubens > > > -------------------------------------------------------------------------------- > WISPA Wants You! Join today! > http://signup.wispa.org/ > -------------------------------------------------------------------------------- > > WISPA Wireless List: wireless@wispa.org > > Subscribe/Unsubscribe: > http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ >
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