Thank you for sharing, Sunil. Indeed I do not need most of the 3750 features such as power management, layer 3 capabilities. I just need the faster performance for my access layer and backbone switches. i.e 48Gbps back plane for 48 Gigabit ports.

Much thanks to you, Joseph.

We can achieve 32Gbps from stackwise feature. Am I correct?

I thought 3750X is specialized for fiber interface before. Sure, I'll look into this.

In fact we do not need stacking and if i m not wrong 3560 is going to EOL.That's why we consider the 3750G.

If we can have the real wire-speed, I'll choose cheaper 2960S.

Because I just want to improve the backplane speed for the access layer and backbone switch.

(i.e 48Gbps backplane for 48Gigabit port switch.)

Again, thank you.

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"We can achieve 32Gbps from stackwise feature. Am I correct?"

Yes and no.  The 32 Gbps Stackwise is two 8 Gbps duplex connections.  Original Stackwise floods everything on all switches across the ring and it's the sender that removes the frames.  Not an optimal design for high performance, such as in a core.  This architecture is sort of similar to an internal bus.

The newer Stackwise+, found on the 3750(E/X) uses two 16 Gbps duplex connections (AKA 64 Gbps).  Only unicast packets that are not local to the sending switch are placed on the ring.  The destination switch removes frames.  This architecture is sort of similar to Token Ring (w/o a token).

"Because I just want to improve the backplane speed for the access layer and backbone switch.

(i.e 48Gbps backplane for 48Gigabit port switch.)"

Typically, fabrics are given as 2x the port nominal bandwidths.  I.e., for 48 Gig ports you would want a fabric specification of 96 Gbps.  This because modern ports are almost always duplex.

For the 2960 series their performance specs are documented in Table 4 in:

http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps6406/product_data_sheet0900aecd80322c0c.html

Hi Leo,

I just want to improve my switching layer performance.

Mostly MS Windows 2000 ~ 2008 Server(32/64) and Ubuntus.

Multiple application servers and MS SQL servers.

Less than 15 and only 3 servers in the DMZ.

Thanks and rgds,

Y Z

1.  3560/3560G isn't going EoL, yet.

2.   What's your budget?  If you have more than 2 3750X switches in a stack then it's cheaper just to get a 4510 with Sup7E.

You want fibre support?  All the 3750X can support up to 4 1Gb SFP or 2 10Gb SFP+ or a combo of 1 10Gb SFP+ and 2  1 Gb SFP.  If you want more then 3750X-12S or 3750X-24S will fit the bill.