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CISCO Introduces CloudVerse Solution

1月 6th, 2012 by routerswitch

Networking company, Cisco technologies last week introduced Cisco CloudVerse, and Cloud applications into the Nigerian market. 

The solution will enable organizations build, manage and connect public, private and hybrid clouds. 

According to Cisco, the CloudVerse allows businesses to realize all of the benefits of clouds: improved agility, better economics, enhanced security and a dynamic, assured experience.The inaugural Cisco Global Cloud Index (2010 – 2015), forecasts how dramatically clouds are changing business IT and consumer services. 

The study predicts that over 50 percent of computing workloads in data centers will be cloud-based by 2014, and that global cloud traffic will grow over 12 times by 2015, to 1.6 Zettabytes per year,  the equivalent of over four days of business class video for every person on earth to:  22 trillion hours of streaming music; 5 trillion hours of business Web conferencing with a webcam and 1.6 trillion hours of online high-definition video streaming. 

Cloud is said to the fastest growing component of data center traffic, which itself will grow 4-fold at a 33 percent CAGR to reach 4.8 zettabytes annually by 2015. 

Cloud is also estimated today to be 11 percent of data center traffic, growing to more than 33 percent of the total by 2015. 

Cloud is becoming a critical element for the future of information technology and delivery of video and content. The vast majority of the data center traffic is not caused by end users but by the data centers and clouds themselves undertaking activities that are largely transparent to end users like backup and replication. 

By 2015, 76 percent of data center traffic will remain within the data center itself as workloads migrate between various virtual machines and background tasks take place, 17 percent of thetotal traffic leaves the data center to be delivered to the end user, while an additional 7 percent of total traffic is generated between data centers through activities such as cloud-bursting, datareplication and updates. 

The study suggests that the predicted explosive growth in cloud and data center traffic will create the need for advanced capabilities that allow the data center and network to work together to support end-to-end cloud application and service delivery. Cloud traffic is dynamic and advanced network intelligence and management capabilities will likely become essential to help enable compute, network and storage resources to be provisioned on-demand. 

Acting General Manager for Cisco in Nigeria, Rechchad, said “Until now, cloud technology resided in silos, making it harder to build and manage clouds, and to interconnect multiple clouds, posing critical challenges for many organizations.” 

“Cisco uniquely enables the world of many clouds connecting people, communities and organizations with an assured cloud user experience for the next-generation Internet. We are very pleased that many of the world’s leading businesses and service providers are adopting Cisco CloudVerse as the foundation of their cloud strategies, and we look forward to partnering closely with each of them on their journey to a world of many clouds,” he added. 

Meanwhile, the new Cisco global Cloud Index projects cloud computing traffic to grow 12-Fold by 2015. IT also projected that cloud will be 51 percent of data center workloads by 2014. 

Cisco CloudVerse offers a compelling economic advantage, helping organizations offer business IT-as-a-service and dynamic SMB/consumer services. Moving from a traditional virtualized data center to a CloudVerse cloud can reduce IT total cost of ownership by up to 50 percent and reduce the time to offer new cloud services from weeks to minutes. 

Note: Do you want to buy ciscosell cisco or wholesale cisco?Then check out Router-switch.com.

The Use of Network Switches in a Network

12月 27th, 2011 by routerswitch

A network switch is a computer networking device that connects network segments. Switches commonly refer to a multi-port network bridge that process and route data at the data link layer (layer 2) of the OSI model. Switches that additionally process data at the network layer (Layer 3) and above are often referred to as Layer 3 switches or multilayer switches.

 

The network switch plays an integral part in most modern Ethernet local area networks (LANs). Mid-to-large sized LANs contain a number of linked managed switches. Small office/home office (SOHO) applications typically use a single switch, or an all-purpose converged device such as a gateway to access small office/home broadband services such as DSL or cable internet. In most of these cases, the end-user device contains a router and components that interface to the particular physical broadband technology. User devices may also include a telephone interface for VoIP.

 

Functions and Roles of Switches in Networks

An Ethernet switch operates at the data link layer of the OSI model to create a separate collision domain for each switch port. With 4 computers (e.g., A, B, C, and D) on 4 switch ports, A and B can transfer data back and forth, while C and D also do so simultaneously, and the two conversations will not interfere with one another. In the case of a hub, they would all share the bandwidth and run in half duplex, resulting in collisions, which would then necessitate retransmissions. Using a switch is called micro segmentation. This allows computers to have dedicated bandwidth on point-to-point connections to the network and to therefore run in full duplex without collisions.

 

Switches may operate at one or more layers of the OSI model, including data link, network, or transport (i.e., end-to-end). A device that operates simultaneously at more than one of these layers is known as a multilayer switch.

 

In switches intended for commercial use, built-in or modular interfaces make it possible to connect different types of networks, including Ethernet, Fibre Channel, ATM, ITU-T G.hn and 802.11. This connectivity can be at any of the layers mentioned. While Layer 2 functionality is adequate for bandwidth-shifting within one technology, interconnecting technologies such as Ethernet and token ring are easier at Layer 3.

 

Interconnection of different Layer 3 networks is done by routers. If there are any features that characterize “Layer-3 switches” as opposed to general-purpose routers, it tends to be that they are optimized, in larger switches, for high-density Ethernet connectivity.

 

In some service provider and other environments where there is a need for a great deal of analysis of network performance and security, switches may be connected between WAN routers as places for analytic modules. Some vendors provide firewall, network intrusion detection,[4] and performance analysis modules that can plug into switch ports. Some of these functions may be on combined modules.

 

In other cases, the switch is used to create a mirror image of data that can go to an external device. Since most switch port mirroring provides only one mirrored stream, network hubs can be useful for fanning out data to several read-only analyzers, such as intrusion detection systems and packet sniffers.

 For further Cisco switches’ info of specs, price, software, configuration, service, etc. Please click on 3560 e 48pd, cisco catalyst 3560 e cost or catalyst 3560 24ts e.

Cisco 2951 Integrated Services Router, Badly Required by Enterprise Branch Offices

12月 6th, 2011 by routerswitch

Cisco 2951 Integrated Services Router, a hot item of Cisco 2900 series required by enterprise branch office, offers unparalleled total cost of ownership savings and network agility through the intelligent integration of market leading security, unified communications, wireless, and application services. And the platform also supports the industries widest range of wired and wireless connectivity options such as T1/E1, T3/E3, xDSL, copper and fiber GE.

 

Key Features and Specifications

General

Device Type:  Router

Enclosure Type:  Desktop - modular - 2U

Connectivity Technology:  Wired

Data Link Protocol:  Ethernet, Fast Ethernet, Gigabit Ethernet

Routing Protocol:  OSPF IS-IS, BGP, EIGRP, DVMRP, PIM-SM, IGMPv3, GRE, PIM-SSM, static IPv4 routing, static IPv6 routing

Remote Management Protocol:  SNMP, RMON

Features:  MPLS support, Syslog support, IPv6 support, Class-Based Weighted Fair Queuing (CBWFQ), Weighted Random Early Detection (WRED)

Compliant Standards:  IEEE 802.1Q, IEEE 802.3ah, IEEE 802.1ag

RAM:  512 MB (installed) / 2 GB (max) - DDR2 SDRAM - DIMM 240-pin

Flash Memory:  256 MB (installed) / 8 GB (max)

Status Indicators:  Link activity, power

 

Communications

Type:  Voice / fax module

Digital Ports Qty:  32

 

IP Telephony

Voice Codecs:  G.711, G.722, G.723.1, G.728, G.729, G.729a, G.729ab, G.726

 

Expansion / Connectivity

Interfaces:  3 x 10Base-T/100Base-TX/1000Base-T - RJ-45 ¦ Management : 1 x console - RJ-45 ¦ Management : 1 x console - mini-USB Type B ¦ Serial : 1 x auxiliary - RJ-45 ¦ USB : 2 x 4 pin USB Type A ¦ 1 x SFP (mini-GBIC)

Expansion Slots Total (Free):  4 ( 4 ) x HWIC ¦ 3 ( 2 ) x PVDM ¦ 2 ( 1 ) x CompactFlash Card ¦ 1 ( 1 ) x expansion slot ¦ 2 ( 1 ) x memory - DIMM 240-pin

 

Power

Power Device:  Power supply - internal

Voltage Required:  AC 120/230 V (50/60 Hz)

 

Miscellaneous

Width:  18.5 in

Depth:  17.2 in

Height:  3.5 in

Weight:  29.1 lbs

Compliant Standards:  CISPR 22 Class A, CISPR 24, EN55024, EN55022 Class A, EN50082-1, CAN/CSA-E60065-00, ICES-003 Class A, CS-03, AS/NZS 3548, FCC CFR47 Part 15, EN300-386, UL 60950-1, IEC 60950-1, EN 60950-1, CSA C22.2 No. 60065, BSMI CNS 13438

 

Software / System Requirements

Software Included:  Cisco IOS Unified Communications

 

Environmental Parameters

Min Operating Temperature:  32 °F

Max Operating Temperature:  104 °F

Humidity Range Operating:  5 - 85%

 

Price and Availability

Product detail: Cisco 2951 Router w/3 GE, 4 EHWIC, 3 DSP, 2 SM, 256MB CF, 512MB DRAM, IPB Conditions: New Sealed

List Price: US$7,500.00

Wholesale Price: US$3,600.00

You Save: US$3,900.00 (52.00% OFF)

Supplier: Yejian Technology

Website: http://www.router-switch.com/

Tel: +852-3755-6766 (Hong Kong)

MSN: cisco@router-switch.com

A&Q for Cisco 2800 Series Routers, Features, Specs, Price

12月 1st, 2011 by routerswitch

For Small to Medium-Sized businesses and enterprise branch office, Cisco router 2800 series is a very great choice when you need to buy a flexible and powerful router. Why to say that? Yeah, better performance, solid reliability, versatility of use, a plethora of WAN interfaces and network modules, and each advantage of Cisco 2800 series routers lets you not refuse it.

 

Yet maybe only these cannot persuade you to be sure of Cisco router 2800 series. Now, check the following quick A and Q for Cisco 2800 series routers in details:

 

Q: What’s the Cisco 2800 series routers like? What kind of company does it fit?

A: Cisco 2800 Series, the replacement for the 2600 Series can be used for a small, midsized, or large organization. Its biggest advantage is the versatility.

 

Four models in Cisco 2800 series:

2801: 2 DSP, 2FE, 2HWIC, 2VWIC/VIC, 0NME (Network Module Enhanced), 1Rack unit (RU)

2811: 2 DSP, 2FE, 2HWIC, 4 HWIC, 1NME, 1RU

2821: 3 DSP, 2GE, 2HWIC, 4 HWIC, 1NME or 1NME-X, 2RU

2851: 3 DSP, 2GE, 2HWIC, 4 HWIC, 1NME or NMD/NME-X/NME-XD, 2RU

 

Q: What network modules do we can install in the Cisco 2800 series?

A: You can install a range of network modules, details as follows:

36 port Ethernet switch with PoE

32 port sync

8 port voice/fax module

Content engine with hard drive

Cisco Intrusion Prevention System (IPS)

Cisco Unity Express (voicemail)

Cisco Network Analysis Module (NAM)

3G cellular WAN interface card

Wireless LAN controller

IP VSAT module

802.11a/b/g WLAN module

8 port HWIC module (to add 8 more HWIC cards)

Take Cisco 2821 as an example, you can install 2 x 32 port Cisco Ethernet switch modules with PoE and use this router as a 64 port switch.

 

P. S: The Cisco 2800 Series supports the Cisco IOS, which provides options security, such as the integrated stateful firewall, the Cisco Security Device Manager (SDM), 1500 VPN tunnels, Gig Ethernet, and redundant power (except for the 2801 router).

 

More features of Cisco 2800 series you can check at: http://www.cisco.com/en/US/products/ps5854/index.html

 

Q: Where can I purchase a new/used/refurbished Cisco 2800 series router at a competitive price?

A: We know that Cisco have so many Cisco suppliers and providers around the world. Different areas have different price lists. As I know, RouterSwitch.com is a good platform for you to not only buy a genuine Cisco router 2800 series but also all kinds of other Cisco routers such as Cisco 800 series, Cisco 1800, Cisco 1900, Cisco 2900, etc., Cisco switches including catalyst 2960, 3560, 3750, 4500, 6500,etc. Cisco Firewalls Security: Cisco ASA 5500 series/PIX Firewall/IPS 4200 series, etc. Besides huge inventory in stock, up to 1 year warranty, flexible secure payment and shipment, you can get a Cisco router or Cisco switch or other Cisco network equipments at a very competitive price.

 

Buy a Cisco router 2800 such as CISCO2851-HSEC/K9, CISCO2851-SEC/K9 or CISCO2851-SRST/K9? Click here: RouterSwitch.com to check.

How to Change the Password on a 3750 Switch?

11月 16th, 2011 by routerswitch

The Cisco 3750 switch has contributed greatly to Cisco’s success in the networking hardware market. Its features provide efficient and reliable network switching services. You can find a pre-owned 3750 model at a good price, and if you do buy a pre-owned Cisco 3750 switch, you may need to change the password before you are able configure it to work on your network. Fortunately, Cisco has provided a built-in procedure that allows you to change the password.

Things You’ll Need

Cisco 3750 switch and serial cable

Computer with terminal emulation software

 

How to Change the Password on a Catalyst 3750 Switch?      

1. Connect your computer to the 3750 switch using the blue serial cable that typically comes with it. Connect the 9-pin d-shell connector to your computer’s serial port, and connect the RJ-45 connector to the switch’s console port.

2. Configure a terminal session to the switch. Power up your computer, open a terminal emulator application, and configure a terminal session with the following settings:

9600 baud

no parity

1 stop bit

8 data bits

Xon/Xoff flow control

Save the configuration with a name that you can recognize later.

3. Hold down the “Mode” button on the left front of the Cisco 3750 switch, and plug in the power cable. Five seconds after the Stat LED goes off, release the “Mode” button. The SYST LED should start to blink amber.

4. At the command prompt, issue the following commands to the switch to prepare it for the reset procedure, and rename the current configuration file:

flash_init

load_helper

dir flash:

rename flash:config.text flash:config.old

5. Boot the 3750 switch by issuing the “boot” command and pressing “Enter.” At the “System Configuration Dialog” prompt, answer “n” and press “Enter” twice. This should display the “Switch>” prompt.

6. Issue the “en” command at the prompt, and press “Enter.” You should see the prompt change from “Switch>” to “Switch#.” Rename the configuration file with the following command:

rename flash:config.old flash:config.text (press “Enter”)

Press “Enter” to accept the destination filename default.

7. Copy the configuration file into the 3750 memory with the following command:

copy flash:config.text system:running-config

Press “Enter” when prompted for a destination filename to accept the default.

8. eate new passwords for the 3750 switch with the following commands:

conf t

enable secret spswd (spswd = your new secret password)

enable password enpswd (enpswd = your new enable password)

line vty 0 15

password tpswd (tpswd = your new terminal password)

login

line con 0

password cpswd (cpswd = your new console password)

write memory

The 3750 will issue a “Building Configuration” message. When you see the [OK] message at the Sw1# prompt, you have completed the password change for the Cisco 3750 switch.

Note: you can click on  WS-C3750X-48P-S  or WS-C3750X-48PF-S to get more related info on this topic.

References:

Cisco Catalyst Fixed Configuration Layer 2 and Layer 3 Switches

http://cisco.biz/en/US/products/hw/switches/ps628/products_password_recovery09186a0080094184.shtml

How to Save the Cisco 3560 Switch Configuration

11月 15th, 2011 by routerswitch

Network switches play an integral role in computer networks by connecting all the devices on the network, enabling communication. Switches can be simple or complex, ranging from small, four-port home office devices with limited management interfaces to complex, 48 port-enterprise level devices with dedicated memory, processors and operating systems. When dealing with complex models, network administrators spend hours configuring each individual device to the exacting specifications required by their network. As with any piece of important data, these configurations need to be backed up.

 

What You Will Need While Saving the Cisco 3560 Switch Config

Cisco 3560 switch

Computer with serial port

Rollover cable

Terminal emulation software (PuTTY)

 

How to Save the Cisco 3560 Switch Configuration

Connect to the Switch

1. Plug your computer into the switch with a rollover cable. This cable has a RJ-45 jack on one end and a serial connection on the other. Plug the RJ-45 end into the “CONSOLE” port of the switch, and the serial end into your computer.

2. Download and install a terminal program called PuTTY to connect to the switch (see Resources).

3. Open the terminal emulation software. In PuTTY, select “Serial” in the “Category” box on the left, then select the correct COM port in the “Serial line to connect to” box. Click “Open” to open the command line of the switch. The command line is a text-based interface for the switch. It has a prompt where you can enter commands to change settings and configurations.

Save the Configuration

1. Type “enable” at the command line, then press return on the keyboard to enter into “privileged exec mode.” The switch prompt should change from “Switch>” to “Switch#, then you can enter the next command.

2. Type “copy running-config startup-config” at the command line and press return on the keyboard. This will copy the current switch configuration to the non-volatile memory, which is memory that will retain its data even without power applied to it.

3. Type “show running-config” to display the current configuration.

4. Click and hold at the beginning of the output from the “show running-config” command, then drag down to the bottom of the PuTTY window. This should select all the text on the screen.

5. Right-click and select “Copy” to copy the text.

6. Click on “Start” and “Run,” then type “notepad.exe” in the dialog box. Click “OK” to bring up the notepad program.

7. Click on “Edit” and “Paste” to put the switch configuration into notepad.

8. Click “File” and “Save” to save the file to your desktop. You now have a backup of your switch configuration that will be around even if your switch goes bad.

Tips & Warnings

The command “copy running-config startup-config” can be shortened to “copy run start.”

Note: you can click on WS-C3560E-48PD-S,WS-C3560E-48PD-SF or WS-C3560E-48PD-EF to get more info related to this topic.

How to Configure a Cisco 1841 Router

11月 9th, 2011 by routerswitch

The cisco 1800 IOS of integrated-service routers includes the Cisco 1841 router. The routers include features that improve security and speed. The Cisco 1841 serves the needs of small and medium-sized businesses, as well as branch offices or locations within large enterprises. Configure a Cisco 1841 router using the Setup Command Facility.

 

How to Configure a Cisco 1841 Router

1. Wait for the startup sequence to complete. When the sequence finishes, the following message will appear on the configuration screen:

Would you like to enter the initial configuration dialog? [yes/no]:

Type “yes” and press the “Enter” key.

 

2. Type “yes” in response to the following prompt:

Would you like to enter basic management setup? [yes/no]:

 

3. Create and enter a router hostname following the prompt. Follow your network’s standard naming protocols if applicable. If your naming protocol requires that you use the router’s physical location, such as “3rd Floor Server Room,” to identify the router, do so.

 

4. Create and type in the following passwords when prompted. First, create an enable secret password, which is encrypted; an encrypted password has been scrambled so that it cannot be read. Next, create an unencrypted enable password, which you can view when viewing the router’s configuration file; you might at some point in the future view the router’s configuration file if you are trouble-shooting problems with the router. Finally, create a virtual terminal password, which secures access to the router through non-console ports. Non-console ports are connections to the router that you make remotely, as opposed to those that you make when you are physically standing close to the router.

 

5. Type “Yes” to configure SNMP Network Management following the prompt, or “No” if you do not need it for your network. Enter the associated public community string if you entered “Yes”. The system will display a summary of the interfaces available for you to use.

 

6. Enter an interface that the router will use to connect to the management network from the displayed summary of available interfaces.

 

7. 说明: http://img.ehowcdn.co.uk/article-preview/ehow/images/a06/b9/rc/configure-cisco-1841-router-1.7-800x800.jpgRJ-45 connectors allow you to plug network cables into a router.cisco 1841 price click here http://www.router-switch.com/cisco1841-p-97.html

 

Type “Yes” to enable FastEthernet support, which allows the router to transmit data through the network at a fast rate of 100 megabits per second. Type in “Yes” to enable RJ-45 connectors, which are the plugs on the router that look like oversize telephone plugs, and into which you insert network cables. Type in “Yes” to enable duplex-mode operations, so that data can travel both to and from the router simultaneously, instead of traveling in only one direction at a time. Enter an IP address if you want to set an address manually. When you have finished, the router will display the new configuration and prompt you to save it.

 

8. Type “2″ at the prompt to save the new configuration to “nvram”, and exit.

How to Configure a Cisco Router

10月 31st, 2011 by routerswitch

For Cisco router users, configuring the router may be a not easy task. How to configure a Cisco router, the full guide help you configure your Cisco router step by step…

The process of configuring a Cisco router involves the invoking of the User, Privilege, Configuration, Interface, and Line modes. These various modes are utilized to allow the definition of information relative to the password, hostname, IP address along with the subnet mask, clock rate, and line configurations that will dictate the behavior of the router device. Prior to powering up the router to undertake its configuration, it is necessary to first set up a terminal emulation application to 9600 baud with eight data bits, no parity and single bit stop. This process will also be used to define the type of protocol that will be implemented across the network which will be supported by the router that will be connected to the computer system’s serial port.

Materials Needed:

- Cisco router
- Ethernet cable
- terminal emulator utility like HyperTerminal

Step 1

The initial steps to the configuration process after setting up the terminal emulation program is to power up the Cisco router and wait for the message prompt to be displayed.

Step 2

To implement basic configuration, type at the command prompt the text ‘Enter Privilege Mode’ followed by the ‘Router > enable’ command.

Step 3

When the cursor appears; type the ‘Enter Configuration Mode’ and the Router# configuration terminal command.

Step 4

In order to implement password protection when accessing Privilege Mode, the ‘Router(config)# enable password p@ssw0rd’ and the ‘Router(config)#enable secret s3cr3t’ commands must be issued.

Step 5

The ‘Router(config)#hostname myrouter1 [Set the hostname to myrouter1]’ instruction provides the user with a way of defining the Hostname or the Router Name that will be broadcasted across the network.

Step 6

The commands to configure the Ethernet port consists of the ‘myrouter1(config)# inte f0/0 [Enter Ethernet Interface Mode ( f0/0 for interface1, f0/1 for interface 2)]’, ‘myrouter1(config-if)# ip add 192.168.0.1 255.255.255.0 [Set IP address and subnet mask]’, and ‘myrouter1(config-if)#no shut [Active the port]’ commands. These commands will allow the smooth flow of network traffic on the defined communication portals.

Step 7

Configuration of the Serial Port makes use of the ‘myrouter1(config-if)#inte s 0/0/0 [Enter Serial Interface Mode]’, ‘myrouter1(config-if)#ip add 192.168.20.1 255.255.255.0 [Set IP address and subnet mask]’, and ‘myrouter1(config-if)#no shut [Active the port]’ commands.

Step 8

It is also necessary to set the bandwidth that will be used by the router. This is commonly done by using the ‘myrouter1(config-if)#clock rate 1000000 [Set the bandwidth to 1Gig]’ and ‘myrouter1(config-if)#exit’ commands.

Step 9

The Secure Console is defined by using the ‘myrouter1(config)#line con 0′, ‘myrouter1(config-line)#password c0ns0l3′, ‘myrouter1(config-line)#login’, and ‘myrouter1(config-line)#exit’ commands. These instructions will configure the access credentials that will be used to bring up this utility.

Step 10

The auxiliary password that will be used to connect any modem device to the router hardware via the remote connection console may be done by using the ‘myrouter1(config)#line aux0′, ‘myrouter1(config-line)#password auXo’, ‘myrouter1(config-line)#login’, and ‘myrouter1(config-line)#exit’ instructions.

Step 11

Securing the login process via SSH or Telnet processes is done by using Virtual Terminal Password. The commands ‘myrouter1(config)#line vty 0 4′, ‘myrouter1(config-line)#password v1rtu@1′, ‘myrouter1(config-line)#login’, ‘myrouter1(config-line)#exit’, and ‘myrouter1(config)#exit’ are executed within the Secure VTY line utility.

Step 12

To finish the configuration process, the settings must be saved either by using the ‘myrouter1#wr me’ or ‘myrouter1#copy run start’ commands.

Read more: http://knol.google.com/k/betsy-yu/how-to-configure-a-cisco-router/y58vbp2zkbqy/27#

How to Set Port Security on a Cisco Catalyst Switch?

10月 31st, 2011 by routerswitch

If you want to ensure that only a certain device—for example, a server—is plugged into a particular switch port, you can configure the MAC address of the server as a static entry associated with the switch port. Cisco-switches.jpg

 

Configure port security

Configuring the Port Security feature is relatively easy. In its simplest form, port security requires going to an already enabled switch port and entering the port-security Interface Mode command. Here’s an example:

Switch# config t

 

Switch(config)# int fa0/22

 

Switch(config-if)# switchport port-security ?

 

aging Port-security aging commands

mac-address Secure mac address

maximum Max secure addresses

violation Security violation mode

 

Switch(config-if)# switchport port-security

 

Switch(config-if)#^Z

 

By entering the most basic command to configure port security, we accepted the default settings of only allowing one MAC address, determining that MAC address from the first device that communicates on this switch port, and shutting down that switch port if another MAC address attempts to communicate via the port. But you don’t have to accept the defaults.

 

You can also configure port security on a range of ports. Here’s an example:

Switch)# config t

 

Switch(config)# int range fastEthernet 0/1 - 12

 

Switch(config-if)# switchport port-security

 

However, you need to be very careful with this option if you enter this command on an uplink port that goes to more than one device. As soon as the second device sends a packet, the entire port will shut down.

 

View the status of port security

 

Once you’ve configured port security and the Ethernet device on that port has sent traffic, the switch will record the MAC address and secure the port using that address. To find out the status of port security on the switch.

 

Switch# show port-security address

 

Disabling Port Security in Cisco Switch/Cisco Catalyst Switch

 

Now we will see an example how to disable port security in cisco security.We have configured fa0/22 for port security now if you want to disable port security follow these steps

Switch# config t

 

Switch(config)# int fa0/22

 

Switch(config-if)# no switchport port-security

 

Switch(config-if)# end

Read more: http://ciscorouterswitch.over-blog.com/article-how-to-set-port-security-on-a-cisco-catalyst-switch-87413855.html

Cisco 1800 Series, Business Router for Small to Medium Sized Business/Enterprise

10月 28th, 2011 by routerswitch

Cisco 1800 Series Integrated Services Routers, the next evolution of the award-winning Cisco 1700 Series modular access routers, own more advantages than the formers. Cisco 1800 series, ideal for small to medium-sized businesses and small enterprise branch offices, enable businesses to reduce costs by deploying a single, resilient system for fast, secure, delivery of multiple mission-critical business services, including data, security, unified communications, wireless.

 

Cisco 1800 series router has several models including 1801, 1802, 1803, 1811, 1812, 1841 cisco(most popular), 1861, all of them have some common features: a. Designed for small businesses or branch offices and to offer secure wireless networking; b. Multiple performance options based on local, remote, or broadband connections; c. Integrated security including encryption and protection against hackers; d. Virtual private networks for linking to partners, suppliers, and remote offices; e. Multiple options for adding reliability and option for reduced costs by using power from network cabling; f. Software upgrades to add new features and functions, and integrated switching capabilities.

 

Cisco 1800 series router has several models including 1801, 1802, 1803, 1811, 1812,sisco 1840(most popular), 1861. You can check details of every type as follows:

The fixed platform models (1801, 1802, 1803, 1811, 1812) include multiple WAN interface options, plus:

  • Up to broadband speeds
  • Eight 10/100 Mbps built-in switch ports with optional Power over Ethernet (PoE), for providing DC power to network devices such as IP phones
  • Up to 50 VPN tunnels
  • Support for wireless local-area network (LAN) standards 802.11a/b/g

 

The 1841 is a modular platform with a wide range of interface options, plus:

  • Up to T1/E1speeds
  • Up to four 10/100 Mbps built-in switch ports
  • Up to 800 VPN tunnels
  • Support for wireless local-area network (LAN) standards 802.11a/b/g

 

The 1861 is a modular platform built on a fixed base with a wide range of WAN interface options, plus: 

  • Integrated Cisco Unified Communications Manager Express or Cisco Unified Survivable Remote Site Telephony for call processing
  • Cisco Unity Express, for voice messaging and automated attendant
  • Integrated LAN switching with Power over Ethernet (PoE) expandable through Cisco Catalyst Switches
  • Onboard voice ports for PSTN, PBX, and key system connections

 

With Cisco 1800 Series integrated services routers; you can lay the foundation for future growth and prepare for voice, video, wireless, and security solutions tomorrow.

 

If you want to know more about e about the certain type of Cisco 1800 series, you can visit the list of prix routeur cisco 1841, prices also offered.

 

 

 

Cisco 1800 Series Models Details…

1800 Series Model

Key Benefits

Type

of Connection

Number of

VPN Users

1802 router

Provide secure access to the Internet and reduce costs by enabling deployment of a single device to provide multiple services typically performed by separate devices

 

Broadband over ISDN lines

 

 

50

1803 router

Provide secure access to the Internet and reduce costs by enabling deployment of a single device to provide multiple services typically performed by separate devices

 

 

Broadband

 

 

50

1811 router

Provide secure access to the Internet and reduce costs by enabling deployment of a single device to provide multiple services typically performed by separate devices

 

Ethernet, Fast Ethernet

 

 

50

1812 router

Provide secure access to the Internet and reduce costs by enabling deployment of a single device to provide multiple services typically performed by separate devices

Ethernet, Fast Ethernet

 

50

1841 router

Highly expandable for addition of other network capabilities

Broadband, Ethernet, Fast Ethernet

 

800

1861 router

Modular design allows for addition of other network capabilities

Ethernet, Fast Ethernet

Up to 8

 

More info about  router 1841 price you can check out http://www.router-switch.com/cisco1841-p-97.html


 
 
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