2011年4月28日 星期四

cisco 3750 switch

In addition to IP-base and IP services feature, the Cisco 3750,3560-X and 3750-X series are supplied with a new LAN Base feature set. The role of three groups available to all Cisco Catalyst 3750-X, 3560-X Series switches are the following:
LAN Base: Improving Intelligent IP services
Baseline: IP Services Business Services: Business Services
Cisco StackWise Plus technology has built a great success, StackWise technology is a leader in the industry, which is a premium stacking architecture optimized for GbE. StackWise technology is designed to respond to additions, deletions while keeping the performance constant. Stack operates as a single switching unit that is managed by a master switch elected from the member switches. Master switch automatically creates and updates all the switching and optional routing tables. The working stack can accept new members or remove existing ones without service interruption. StackWise creates a very flexible system with up to nine individual switches provide simplified administration of a single IP address, a telnet session, a command line interface, the automotive version of the amendment, automatic configuration, and more.
StackWise Plus supports all the features of StackWise and provides backward compatibility with the Cisco Catalyst 3750 Series while improving the turnover of the system up to 64 Gbps. StackWise Plus also allows for local switching in the Cisco Catalyst 3750-X series. Local switch packets coming into a port in the Cisco Catalyst 3750-X series or 3750-E Series Switches for another port on this switch do not have to traverse the stack ring, which will increase the transmission capacity of the switch. Cisco Catalyst 3750-X Series stacks up to nine switches as a single logical unit for a total of 432 Ethernet 10/100/1000 ports with 18 10 GbE ports. Individual 10/100/1000 units can be assembled in any combination to evolve with network needs.
The Cisco Catalyst 3750-X series StackPower Cisco introduces technology, innovation capacity of the interconnection system that allows the power supply in a cell as a common resource shared by all switches. StackPower Cisco unifies the individual power switches installed and creates a group of power to direct that power when necessary. This feature is only available in the Cisco Catalyst 3750-X series switches or IP based IP services feature set. Up to four switches can be configured in a stack StackPower special connector in the back of the switch with StackPower cable, which is different from the StackWise cables available in all Cisco 3560g models.
StackPower can be set to power-sharing arrangements or termination. In a power-sharing state power, all power supplies stacked together and divided by switches in the stack. In redundant mode, where the budget for the total power, calculated on the stack, the maximum power output is not included. This power is in reserve and used to keep the power switches and attached devices, if a power failure occurs, the network operates without interruption. After the failure of a power supply, changes in your StackPower will become power sharing.
StackPower allows customers to simply add additional power to a position in the stack, or to provide redundant power for a member of the battery or simply to add more power to the pool. StackPower eliminates the need for an external redundant power system or the installation of dual power in all stack members.
Catalyst 3750-X and the cisco 3560 Series switches support a voluntary network module uplink ports. The switch configuration by default does not include the uplink module, you can choose four GbE ports (3kx-NM-1G) or network module with two 10 GbE ports (3kx-NM-10G) at the time of purchasing the power switch. 10GbE uplink module has four physical ports and two SFP + ports and two SFP standard. SFP + connector supports both 10GbE and GbE ports, allowing the customer to use the investment SFP GbE and 10 GbE update when business requirements change, without having to do a complete upgrade of an access switch. Uplink module is hot-swappable.

2011年4月15日 星期五

Cisco Ditching Flip - Another Chance for iPhone / iPad to Expand?

On Tuesday, networking giant Cisco, made an official announcement that they are going to stop making their small-sized video camera Flip, which could open the door of opportunity for Apple and other smartphone and tablet makers to fill the void.

The Flip camera came with the acquisition of Pure Digital for $590 million, though it doesn't seem to have fitted well into the company’s business strategy.

"We are making key, targeted moves as we align operations in support of our network-centric platform strategy," used Cisco CEO John Chambers explained.

 "As we move forward, our consumer efforts will focus on how we help our enterprise and service provider customers optimize and expand their offerings for consumers, and help ensure the network's ability to deliver on those offerings."

Apple products, especially the iPhone and iPad, may have contributed towards the downfall of the Flip, as we observe the global tendency of having an all-in-one device that could do all the “tricks”: music, video, entertainment, work, personal life.

Apple could well take advantage of this market opening and put more emphasis on the video capabilities of its devices. With iPhone or iPad, every millimeter or ounce counts, so Apple engineers will have to figure out the perfect way to integrate advanced video hardware; and still to maintain the stylish look that Apple has been boasting over the past years.