Re: Any 1U - 2U Ethernet switches that can handle 4K VLANs?

[Mikael Abrahamsson <swmike () swm pp se>]

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: swmike () swm pp se