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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: Any 1U - 2U Ethernet switches that can handle 4K VLANs?
On Mon, 26 Jan 2004, Alexei Roudnev wrote: > PS. How much ethernet ports do you have in the office? Do you have 100 K > ports? If not, why do you need 128K MAC's? (I know only one case, when I > need so much - some kind of DSL service... I guess you're not into metro networking. > (just as performance - it have _enough_ performance). Btw, I believed that > catalist swithes have not any limitations for the MAC tables (because they > use memory _on demand_); where did you get this limitations? /I may be wrong > here/ <http://www.cisco.com/en/US/customer/products/hw/switches/ps646/products_tech_note09186a0080094bc6.shtml> You have something like 16-24.000 entries which are shared between routes, QoS, mac adress table size etc. Default is 5k mac adress size on the 3550-24/48. For metro applications, this is not enough. > PPS. I do not know for sure, but 3550 should support traffic shaping, which > makes bufferring. Technically, yes, CEF (with packet dropping) is not good > to provide 2 Mbit by 100 Mbit link. The 3550 doesnt support shaping of any kind, only policing (dropping packets, never buffer them). How can you advocate a switch which you seem to know so little about? -- Mikael Abrahamsson email: [email protected]
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