2012年10月11日星期四

What Router-switch.com Prepared for Its 10th Anniversary?



During the past ten years, from 2002 to 2012, router-switch.com has grown up into a global leading Cisco supplier. Indeed, it has experienced several vital moment. Here let’s share some router-switch.com’s big events:
2002, Router-switch.com was founded.
2003, Router-switch.com has experienced a rapid development.
2004, CCIE technical support team was built.
2005, The sales volume maintains 70% growth per year.
2006, Staff in company increased to 20.
2007, Router-switch.com established its marketing department. It attained its reputation in providing timely information of Cisco for clients and Cisco users.
2008, Router-switch.com adopted necessary advanced management tools to improve its service for clients.
2009, Router-switch.com upgraded warehouses in Hongkong and Mainland China. Its inventory is worth over $5 million.
2010, The sales of Router-switch.com have zoomed to $ 30 million.
2011, Router-switch.com released the new version to update service. It supplies free CCIE support. Social network platforms were opened to communicate with customers and clients well.
2012, New Office of router-switch.com landed in US to offer professional local service.

Nowadays, router-switch.com is becoming the world’s largest Cisco reseller online.  It believes that router-switch.com will bemore professional, more reliable and stronger with your support.
Note:A letter from CEO of router-switch.com to thank its customers and sharetheir progress.

More about Router-switch.com:
Router-switch.com, also called YejianTechnologies Co., Ltd, is the worldwide leader in delivering new, used, refurbished Cisco hardware, including Cisco routers, Cisco switches, firewall security, Cisco IP Phones VoIP, wireless AP, Cisco modules & cards, memory, and optical cables, SFP, GBIC, XENPK , etc. It carries over $5 million in inventory of Cisco hardware and Cisco equipment that can meet SOHO, small, midsized and large businesses of all sizes. Also Router-Switch.com owns more than 8,000 customers worldwide, not only because of its original Cisco products with reliable quality and competitive price, but also due to professionalservice, huge inventory, flexible payment and shipment. More information about router-switch.com can be found at http://www.router-switch.com/. For ongoing Cisco info, please go to
Blog.router-switch.com---News, tutorials, tips, info & thoughts on Developments in the Cisco, Cisco network, IT, Software & Network Hardware Industry

More Related Router-switch.com News:
Router-switch.com Announced Its Newly Redesigned Website
“Router Switch”, Our New Company Landing in U.S.—Professional Cisco Supply Service is Around You
Router-switch.com: A Batch of New Cisco Network Equipment Surprises the Coming Christmas Day
Router-Switch.com Uploaded Thousands of New Cisco Products

2012年3月14日星期三

Benefits of Cisco Supervisor Engines

Supervisor Engine is a module that is installed in the used network hardware Chassis-based Catalyst Switches or Routers. Supervisor engine contains nearly all the same components of a fixed Cisco Switches or Routers. These Supervisor engines come in a variety of different types with different functionalities and are installed in the Switches/Router Chassis as per requirements of the network types.

Benefits of Supervisor Engines
•    By installing Latest Supervisor Engines in your existing investments (Switches and Routers) you can scale system performance and integrate next-generation services into your Networks.
•    Within a single multilayer switch chassis, two supervisor modules with integrated route processors can be used to provide hardware redundancy. If an entire supervisor module fails, the other module can pick up the pieces and continue operating the switch

The supervisor engine contains the following integrated daughter cards that perform forwarding and routing and provide the cisco used equipment protocols supported on the router.

Policy Feature Card (PFC) is the forwarding plane and does the following:
•    Performs Layer 2 and Layer 3 forwarding.
•    Enforces access control list (ACL) functions.
•    Performs policing and marking for quality of service (QoS) traffic.
Multilayer Switch Feature Card (MSFC) is the control plane and does the following:
•    Performs routing for the chassis. The MSFC contains the route processor (RP) and Switch processor (SP) for the router.
•    Runs Layer 2 and Layer 3 protocols, such as the Spanning Tree Protocol (STP) and others.

You can View a 3D model of Catalyst 6500 Switch, here you can see how the Catalyst Switch 6500 looks like, Mount/Demount Supervisor engines, and other inserted modules, view short details of them by demounting from Chassis.

The Cisco Supervisor Engine is the heart of many of  cisco used equipment  switches. The Supervisor Engine has evolved several times. While it is the management segment of many routers, the power of the switch is often much greater than that of the Supervisor Engine because one of the features of many switches is that dozens of the functions are accelerated by ASIC chips.
Abridged list of features:
    802.1q VLAN
    Spanning Tree Protocol
    Ether Channel
    Jumbo Frames
    (E)IGRP, OSPF, RIP (2), Static Routing
    BGP, IS-IS
    QOS
    Some have Layer 3 & 4 Switching
Specifications of Supervisor Engine
Supervisor Engine    Mpps[1]
Switching Layer    Bandwidth[2]
CPU Frequency    Max Ram    Max Flash    OS    Minimum IOS
1    15    2    1.2-32    25 MHz Motorola 68k    128MB    16MB    CatOS    N/A
2    30    2    18    150 MHz Mips R4700    128MB    16MB    CatOS    N/A
2+    48    4    64    266 MHz R4700    256MB    32MB    CatOS/IOS   
3    15    4     ?    150-300 MHz    256MB     ?    IOS    12.1(8a)
4    48    4    64    333 MHz    512MB    64MB    IOS    12.1(12c)
5    136    4    102    400-800 MHz    512MB     ?    IOS    12.2(18)
6    250    4    320    1.3 GHz    1GB     ?    IOS    12.2(40)
720        5    720    400/200 (MHz?)    1GB    64MB    CatOS/IOS   
32        5                    IOS   

Supervisor Engine I
    68EC040
    Chassis: 2900, 2948G, 2980G, 4000, 4500, 5000, 5500, 6000, 6500, 7600
Supervisor Engine II
    MIPS R4700
    Chassis: 2926, 4000, 4500, 5000, 5500, 6000, 6500, 7600
Supervisor Engine II+
    MIPS R4700
    Cisco Express Forwarding
    Chassis: 2926, 4000, 4500, 5000, 5500, 6000, 6500, 7600
Supervisor Engine III
    Cisco Express Forwarding
    Max DRAM: 256MB SD
    Redundant Capable
    Netflow accelerator card
Supervisor Engine IV
    Cisco Express Forwarding
    Max Flash: 64MB (supplemental Compact Flash optional)    Supervisor Engine V
    Cisco Express Forwarding
    Chassis: 4500
Supervisor Engine 6
    Cisco Express Forwarding
    Chassis: 4500 "E" Series
Supervisor Engine 32
    Cisco Express Forwarding
    Chassis: 6000, 6500
    A low cost, reduced version of the 720
    Policy Feature Card 3b
    MSFC 2A?
Supervisor Engine 720
    Cisco product Express Forwarding
    Policy Feature Card 3A, 3B, 3BXL
    Chassis: 6500, 7600
MSFC1-3
    Multi-Layer Switch Feature Card

2012年2月16日星期四

Types of Cisco Voice over IP Phones

With the proliferation of Voice over IP (VoIP) telephone technologies, sell cisco used IP Phones have become a popular choice because of an extensive selection of models covering a wide range of needs. While they employ features specific to the Cisco VoIP servers, these phones can also be used with "open source" VoIP technologies. As the phones progress toward the Cisco 9900 series, more features become available. The models listed here range from basic cubicle phones to sophisticated phones that include video conferencing capabilities.

Cisco 6900 IP Phone Series
This series of phones includes models with the same basic features, but the phones are distinguished by their line capacity, which ranges from two to 12. The 6900 series phone offers lighted hold and menu keys as well as a lighted call-waiting indicator. The series includes a speakerphone and interface for headsets. This entry-level phone offers a graphical display that can display basic images such as a corporate logo. The display also features scrollable menu selections to access additional features.

Cisco 7900 IP Phone
The cisco sell 7900 series includes a large number of models for specialized business needs. A brief survey of these models includes models 7910, 11 and 12. These phones are sets that offer minimal features. The phones in this model line are designed for common areas such as lobbies, classrooms or individual cubicles. The 7920 class includes all phones designed for mobile use. They are wireless models that connect to networks via the 802.11b and 802.11g protocols. The 7935, 36 and 37 are conference-station models that include external microphones and features suited to conduct corporate conference calls. The 7985 is a videophone that includes a high-quality camera and XGA computer LCD monitor.

Cisco Unified IP Phone 8900 Series
This series is described by Cisco as "an advanced professional media endpoint that delivers an enhanced user experience with an easy-to-use and eco-friendly ergonomic design." These phones feature high definition voice and video quality with a fast gigabyte network interface. In addition, they include VGA color computer-style displays and an external USB port. The 8900 series hosts a full feature set including programmable buttons, LEDs and the ability to handle as many as five call sessions simultaneously.

Cisco Unified IP Phone9900 Series
This series makes up selling cisco equipment highest-end phones. The series is described by the company as "an advanced collaborative media endpoint that provides voice, video, applications and accessories." The 9971, for example, features video conferencing as well as wired or wireless operation through 802.11g and Bluetooth. The LCD touch screen offers VGA resolution for ease of use and customization. These phone models are designed for high-end corporate executives and business administrators.

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The Benefits of VoIP Cisco
Voice over Internet Protocol (VoIP) telephony offers more communication options than other types of business telephone systems. VoIP works over the business computer data network, and does not need to have a separate communications network installed like other phone systems do. Because VoIP is Internet based, it works like a computer or laptop, and is given an independent IP address. This means that VoIP telephones can work from any location, and can integrate voice mail, video conferencing, or change any phone voice communication into data communication, so long as there is a connection to the Internet or the corporate network.

Cost Savings
An obvious benefit to VoIP is overall call cost. Corporations that have VoIP have the same low-cost phone calls even when facilities are located internationally. Because communications are processed through Internet data lines, this cost is usually just a few cents per call.

VoIP also offers equipment cost savings, installation and repair service savings, and expansion cost savings. With VoIP, all the phone communications issues can be handled by the internal IT (Information Technology) department, which means there is a significant manpower cost savings too.

Convenience
VoIP offers more varied customer service options like Website calling, Website call-back options, and video conferencing. Voice mail is also better organized through VoIP technology, and can be sent directly to the appropriate employee's email inbox to be dealt with at the appropriate time.

A VoIP system makes it easier to keep track of call data, by easily managing call information and converting it to a data file. Information like customer name, address, phone number, issue and solution is stored on the corporate computer hard drive, and can later be referenced by customer service agents or management at any time.

Expandability
Most businesses, no matter what their size, need some type of call center function. Under normal circumstances, every time a new call center station is set up, there is a cost, and most phone providers will not just sell the necessary equipment for one station, but instead, will sell a package of a certain number of phone installations. cisco hardware With VoIP, a business can expand by as much or as little as it needs to. A business can add just one phone station, or a dozen, in a matter of a few minutes, and these can be located in the corporate offices, or at any off-site location, like an employee's home.

2012年1月16日星期一

Basic Cisco Router Configuration Steps

This post is by no means an exhaustive tutorial about cisco 3800 router and how to configure their numerous features. It is just a step-by-step guide for the most basic configuration needed to make the router operational. When you first power on a new Cisco Router, you have the option of using the “setup” utility which allows you to create a basic initial configuration. However, in this post I will show you how to do this basic setup with the Command Line Interface (CLI). Mastering the Cisco Router CLI is essential for more complex configuration tasks and it is the most important knowledge you should acquire if you want to become a Cisco network administrator.

The basic CLI modes that we will be referring below are as following:
Router>  <– User EXEC Mode
Router#  <– Privileged EXEC mode
Router(config)#  <– Global Configuration Mode
Router(config-if)# <– Interface Configuration Mode
Router(config-line)# <– Line Configuration Mode

I assume that you already have some basic knowledge of CLI and how to navigate between different configuration modes (user mode, privileged exec mode etc), so let’s get started:

Step1: Configure Access Passwords
The first step is to secure your access to the router by configuring a global secret password and also passwords for Telnet or Console as needed.
Enter into Global Configuration mode from the Privileged EXEC mode:
Router# configure terminal  <– Privileged EXEC mode
Router(config)#  <– Global Configuration Mode

In Global Configuration Mode you configure parameters that affect the whole router device. Here we will configure the Enable Secret password that you will be using from now own to enter into Privileged EXEC Mode from User EXEC Mode.

Router(config)#  enable secret“somestrongpassword”

From now on, when you log in from user EXEC mode you will be asked for a password.
It is suggested also to configure a password for the Telnet Lines (VTY lines) which will secure your access when connecting via Telnet over the network.

Router(config)#  line vty 0 4
Router(config-line)# password “strongTelnetPass” 
Router(config-line)# login

Step2: Configure a Router Hostname
To differentiate your Router from other devices in the network, you should configure a Hostname for your device.

Router(config)#  hostname My-Router
My-Router(config)#

Notice that your cisco 3825 router prompt changes to the new hostname that you have just set.

Step3: Configure IP addresses for Router Interfaces
This is an essential step in order for your router to be able to forward packets in the network. The most basic parameter for a Router Interface is the IP address. From Global Configuration Mode you need to enter into Interface Configuration Mode:

My-Router(config)# interface serial 1/1
My-Router(config-if)# ip address 100.100.100.1 255.255.255.252
My-Router(config-if)# no shutdown
My-Router(config-if)# exit
My-Router(config)# interface fastethernet 0/1
My-Router(config-if)# ip address 192.168.10.1 255.255.255.0
My-Router(config-if)# no shutdown
My-Router(config-if)# exit

Step4: Configure Routing (Static or Dynamic)
The Router’s main purpose is to find the best route path towards a destination network and forward packets according to the best path. There are two main ways a router knows where to send packets. The administrator can assign static routes, or the router can learn routes by using a dynamic routing protocol. For simple network topologies, static routing is preferred over dynamic routing. Let’s see how to configure static cisco3825 router from Global Configuration Mode.

My-Router(config)#  ip route [destination network] [subnet mask] [gateway]  
My-Router(config)#  ip route 200.200.200.0 255.255.255.0 100.100.100.2

The command above tells the router that network 200.200.200.0/24 is reachable via gateway address 100.100.100.2.

Another popular static route that we usually configure on Internet Border routers is the default static route:

My-Router(config)#  ip route 0.0.0.0 0.0.0.0 50.50.50.1
The default static route above instructs the router to send ALL packets that the router does not have a more specific route entry to gateway address 50.50.50.1 (which might be the ISP gateway address).

Step5: Save your configuration
Save your current running configuration into NVRAM.CISCO2811-AC-IP This will overwrite the startup configuration.

My-Router(config)# exit
My-Router# copy running-config startup-config

You can display your current configuration to verify your settings as following:

My-Router# show running-config