ASCII.jp [30th] eliminates the wasted switches with sharp investment!

There is also a trend in how to choose the switch, which is the stall of a corporate network.If you are aiming for cost reductions, you can cut off unnecessary functions and respond with a sharp investment that leaves important functions.Here are some measures that will reduce costs.

How much is the Layer 3 switch function?

As you know, there is a difference between Layer 2 (L2) and Layer 3 (L3) in a word.Since the L2 switch only performs simple packets at the Ethernet level, it is used to bundle the host.On the other hand, the L3 switch is realized up to IP routing using VLANs as units.Therefore, when separating a different subnet in the LAN, an L3 switch is required naturally.

The difference between the switch and the L3 switch is the split of the broad cast domain

In the past, when purchasing a switch, it was good to have a simple choice of L2 switch or L3 switch.However, the situation is slightly different these days, and the boundary between L2 and L3 is ambiguous.Regardless of the box -type switches for individuals and SOHO, the multifunctional of the switches for companies is a glimpse, and it is equipped with a wide range of technologies such as packets and VLANs, as well as quarantine networks, QOS, and redundant protocols.In addition to these, the L3 switch is equipped with L3 redundant protocols such as routing, packet filtering, multicast, and VRRP.To be honest, it's difficult to master all the functions, and it's not necessary.Therefore, in order to reduce costs, it is necessary to devise a product selection.

First, aim for a low -cost L3 switch that has emerged in recent years.For example, switches such as BS-G3024MR, which cost less than 100,000 yen, and GSM7248R, which also have 48-port models, is a unique product that adds static routing to intelligent switches.Hardware routes between VLANs are possible and IP filtering can be performed, so this is often enough for inter -subnet communication in internal LAN.

In addition, there is an L3 switch like the "HP Procure 3500" that realizes a low price by dare to set 100Mbps instead of gigabit.Of course, it is difficult to introduce a company that anticipates Gigabit, but it is not a bad option if the purpose of L3 switch is clear at a small base.

Low price 100Mbps compatible L3 switch "HP Procurve 3500"

Find out the necessary options

One thing to keep in mind when introducing a switch is the cost of options.It is often the case that the body is not so much, but if you add an option, it will be expensive.

Options are software licenses that realize dynamic routing, IPv6, Radius server, multicast, etc.By introducing these functions wisely, it will reduce costs.

For example, OSPF often requires a separate license, but some L3 switches in the Alride Telesis do not require a future license up to 65 routes of OSPF V2.On the other hand, some models of net gears and H3C provide standard support for IPv6.When checking the price, I want to make sure that the function you want to use is not included in the options.

Also, be careful about interfaces and cables.For example, the GBIC required for connecting Gigabit and the cables for connecting them are surprisingly expensive.In particular, in the case of stackable switches that add ports by stacking multiple switches, the dedicated stack cable is quite expensive.In any case, if you want to consider future expansion or expansion, you should calculate the cost in advance.

The interface module such as GBIC for connecting optical fiber is surprisingly expensive

The core switch is also a box type

Corporate core switches are often reliable chassis.However, chassis -type switches, which are modularized with interfaces and packet processing engines, are generally expensive because they are reliable.There is also a problem that consumes space and power and complicates the configuration.

The concept of using a box -type switch as a core switch is to overcome these chassis -type switches.Arid Telesis's "CentRecom X900 Series", "APRESIA13000-24GX-PSR" on Hitachi Electric Wires, which appeals for BoxCore, and IRF (Intelligent Resilient Framework, etc., etc., which cluster multiple switches in a general-purpose network interface, etc.Is listed.These box -type switches are focused on the technology that makes the line, routes, and gateway itself easier to redundancy for chassis -type switches that redundant the components of the device.Compared to the chassis type, the housing is more compact and the price is low, so you may consider it when you replace.

"APRESIA13000-24GX-PSR" by Hitachi Electric Wire

See high -low comics

The high -low mix, which uses expensive and reliable products for core switches and reducing distributions and edges with inexpensive switches, is often used in cost reduction.The same vendor from the top to the bottom is no longer used as long as the cost advantage is not large in terms of maintenance.In the world of Ethernet, IEEE802.As long as it conforms to the 3 standard, it is natural to be able to connect to it.If so, it is better to summarize the edge with a cheap device.