爱达荷州立大学中国学生学者联谊会

Chinese Association of Idaho State University (CAISU)

How to decide on the Right 'cisco' Switches for Where You Live Network?

How to decide on the Right 'cisco' Switches for Where You Live Network?

Creating network designs for individuals isn't an easy task, for a lot of factors and needs need thinking about. It's the truth that most organizations don't upgrade their LAN to organize for future years many of them don not touch the network as lengthy because it is running correctly and supporting the user's applications. When beginning the look process for placing a secure voice system around the network,Switches that takes the network needs one step further.

There's much more to think about than QoS for putting voice around the LAN, although it is exactly what the discussion is generally focused on. The LAN also offers to have many other attributes:

Secure - with voice around the LAN, the switches should have security measures that may prevent them from getting attacked with MAC address floods, rogue DHCP servers, gratuitous ARP's altering the default gateway, along with other attacks that may be launched by adware and spyware.

Fast - If voice experiences multiple switches, each hop can also add latency. Rather of store and forward from the ethernet frames, switches should use cut-right through to move things along. Server and uplink speeds ought to be gigabit, while for many organizations 10/100 Mbsp towards the desktop is simply fine.

QoS - As discussed above. This is necessary mostly in uplinks. When remote access layer closets are connected to the distribution layer, there's a choke reason for the LAN. Any choke points require queuing you prioritized the voice.

Reliable - Lengthy Mean Time Between Failure, well tested code to limit bugs, good support in the manufacturer in situation there's an application or hardware issue.

Managable - The switches have so that you can be managed remotely, have SNMP information, have the ability to log, and become configurable. Graphical user interface interfaces are ok, but there's nothing beats a good command line interface for rapid configuration, troubleshooting, and repair.

Power Density- Switches have so that you can offer the power density from the planned devices. Most switches cannot power all ports in the greatest levels.

Power and Cooling Since IP phones are powered in the switches, all access layer switches will need correctly sized UPS's. A fundamental switch consumes about 60 Watts. A 48 port switch with 15 Watt phones connected to every port will need a minimum of 600 Watts. Place a couple of of individuals switches within the closet an you're searching at not just a larger UPS, but additionally better cooling.

Redundant Design The only real place that there must be just one reason for failure reaches the access layer within the closets. If your switch fails, just the devices linked to that switch should lose connectivity others should deal with the problem. Generally which means dual uplinks from each closet to some redundant distribution layer fundamentally.

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