Full Speed Ahead Traffic to Increase 18X by 2016

Today in a global webcast from the Royal Opera House in London, we announced our annual Cisco Visual Networking Index Mobile Forecast, 2011-2016, to a global audience.  While some people may have been anticipating a decrease in mobile traffic considering the importance service providers are placing on mobile traffic offload and the tiered pricing plans being put in place for subscriber, just the opposite occurred.  Even in the face of those downward pressures along with the continuing economic uncertainties, the total amount of traffic in the forecast period is expected to soar 18-fold from 2011 to 2016, reaching 130 exabytes annually.  To put that amount into perspective, an exabyte is 10 to the 18th power of bytes which is a large number in its own right;  130 exabytes is the data equivalent of having 33 billion DVDs streamed in the airwaves around us each year.

Even more amazing is that the increased amount of traffic going onto the mobile internet between 2015 and 2016 is the equivalent of three times the total amount of traffic on the global internet in 2012!   No question it is a massive challenge for network architects but is also a great indicator of the incredible demand consumers have for the mobile offerings of providers.

Some may believe that such numbers may seem a bit hard to fathom, but the VNI forecast, now in its 6th year, has historically been on the conservative side of its projections.  For example, in last year’s forecast, we anticipated 131% traffic growth in 2011; however, when we were able to assess the actual data, the growth in 2013 turned up just a bit higher – 133%.  So if history is a guide, the overall amount of traffic may very well exceed 130 exabytes by the time we celebrate New Year’s 2017.

While analysts and regulators in today’s cisco 3825 router webcast (available below) and on our social media release, spoke of the credibility of the study, we were also honored to see the senior executive vice president of one of our largest customers, ATT, do the same as well.  Mr. John Donovan’s blog on the subject and the story of their growth – which far exceeded the VNI projections by achieving 20,000% since 2007 (!) is a very worthwhile read and highlights, much in line with the VNI study itself, that traffic isn’t going to be driven primarily by laptops as in the year past but by the ever increasing array of smartphones.  Being optimized for video, having advanced computing power, and applications that can do seemingly everything will have more and more users by 2016 as they view “the smartphone as the new laptop.”

There is much data from the study to share which I’ll do in upcoming posts, as well as plenty to discuss – much like our panel did – as to how for providers to manage this upswing in demand.  In the interim, I recommend you check out all the details at www.cisco.com/go/vni , get a customized view of the data by country, region, service or device via the interactive tool, or join the more than 900,000 users C3845-H-VSEC/K9 who have downloaded the VNI app that will not only provide some insight as to how fast you are on the mobile internet, but will help shape the accuracy of the study all the more in the years to come.

And considering the tablets are projected to account for 10% of the mobile internet traffic in 2016 but didn’t even have their own device category just two years ago (!) because they were so nascent, to me it leads to the question of what else is going to be entering the market that could have a dramatic change on these numbers even further?  A new application?  A new device?

First Ever Cloud Infrastructure Test: Cisco Delivers Impressive NGN Innovations

In years past we’ve delivered on what we call “Megatests” -- comprehensive evaluations that validate our performance claims. The most recent “Megatest”  was initiated by Light Reading to assess Cisco’s CloudVerse architecture, and represents the industry’s first and only end-to-end test of public cloud infrastructure. The first of four reports focused on the Unified Data Center, including Unified Compute (Cisco UCS), Unified Fabric (Nexus family), and Unified Management.

The second report, Cloud Intelligent Networks sought to validate the performance of Cisco’s IP NGN infrastructure in a world of cloud computing. For example, can we deliver on the scale of network needed to connect customers to the cloud? And how can traffic between clouds (data centers) be delivered most efficiently to optimize network resources? Let’s look at the results:

IP/MPLS Core & Data Center Interconnect: The Cisco CRS and ASR 9000 delivered flawless IP/MPLS performance between the data centers and clients, delivering on the massive network scale required to connect customers to the cloud. Furthermore, by leveraging Cisco Network C2851-35UC-VSEC/K9 Positioning System (NPS) traffic was dynamically sent to the data center able to provide the optimal response. No other vendor in the industry offers this capability.

IPv6: IPv6 is a foundational technology for cloud networking given the sheer number of devices that will connect. EANTC evaluated Cisco’s CGv6 solution at 80 Gbps using a Cisco CRS equipped with four Carrier Grade Services Engines to validate the performance of two IPv6 transition technologies.

  • Stateful NAT64: The Cisco CRS translated IPv6 traffic to IPv4 at 4 million translations per second. The same system forwarded at nearly line rate and scaled to over of 67 million translations.
  • 6RD: The Cisco CRS forwarded line rate traffic across 1 million IPv6 RD tunnels, facilitating the migration of customer network at a high degree of scale.

Dual stack (v4/v6) traffic was also tested and Cisco’s IP/MPLS core and data center infrastructure successfully forwarded 96 Gbit/s of bidirectional traffic.

DHCPv6: Restoring connections quickly is critical, even if connected to the cloud. Using our Prime Network Registrar running on a Cisco UCS CISCO2811-AC-IP we demonstrated an ability to provide IPv6 addresses to more than 18K users per second from the cloud.

Listen to Cisco Product Line Manager Mauricio Cruz discuss the importance of IPv6 to Cloud Networking and the results of the Cloud Megatest:

As the world moves to the “World of Many Clouds”, the Next Generation Internet is more important than ever. Next up will be the third report on the Cloud Megatest which will analyze Cloud Applications and Services.

Cisco 3900 Series Router, For Small to large Office and Enterprise

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The Cisco 3900 series, designed to power the next phase of branch-office evolution, builds on the best-in-class offering of the existing Cisco 3800 Series Integrated Services Routers by now offering four platforms: the Cisco 3945E, Cisco 3925E, Cisco 3945, and Cisco 3925 Integrated Services Routers.

 

Cisco 3900 router offers embedded hardware encryption acceleration, voice- and video-capable DSP slots, optional firewall, intrusion prevention, call processing, voicemail, and application services. In addition, the platforms support the industry's widest range of wired and wireless connectivity options such as T1/E1, T3/E3, xDSL, copper, and fiber Gigabit Ethernet.

 

And the Cisco 3900 series router also offers superior performance and flexibility for flexible network deployments from small business offices to large enterprise offices-all while providing industry-leading investment protection.

 

The Cisco ISR G2 routers provide superior services integration and agility. Designed for scalability, the modular architecture of these platforms enables users to evolve and adapt with your growing business needs. Business benefits of the Cisco 3900 Series router are listed as follows:

Services On-Demand: The Cisco 3900 router reduces initial capital outlays by decoupling the delivery of software from hardware on optional service modules. In addition, you receive a Universal IOS image capable of enabling all of Cisco's rich IOS features and allowing you to quickly deploy new services.

Investment Protection: The Cisco 3900 Series reduces deployment costs and increases flexibility. The platform offers a modular, field upgradable motherboard called the Services Performance Engine (SPE). SPEs allow you to invest in a 3900 Series ISR today and boost its performance later by upgrading to a higher-performance engine. Investment protection is also offered with support for a majority of existing modules from previous-generation ISRs.

Energy Efficiency: The Cisco 3900 architecture includes higher-efficiency power supplies with intelligent power management, with full Cisco EnergyWise feature support in the future. Both ISR 3925 and 3945 routers support dual power supplies for power supply redundancy for branch or retail environments running mission-critical applications.

High Performance: The Cisco 3900 Series router offers significant performance improvements over previous-generation ISRs.

 

Cisco 3900 with Cisco IOS Software Feature and Protocol High-Level Support

Protocols  • IPv4, IPv6, static routes, Open Shortest Path First (OSPF), Enhanced IGRP (EIGRP), Border Gateway Protocol (BGP), BGP Router Reflector, Intermediate System-to-Intermediate System (IS-IS), Multicast Internet Group Management Protocol (IGMPv3), Protocol Independent Multicast sparse mode (PIM SM), PIM Source Specific Multicast (SSM), Distance Vector Multicast Routing Protocol (DVMRP), IPv4-to-IPv6 Multicast, MPLS, Layer 2 and Layer 3 VPN, IPSec, Layer 2 Tunneling Protocol Version 3 (L2TPv3), , Bidirectional Forwarding Detection (BFD), IEEE802.1ag, and IEEE802.3ah

Encapsulations  • Generic routing encapsulation (GRE), Ethernet, 802.1q VLAN, Point-to-Point Protocol (PPP), Multilink Point-to-Point Protocol (MLPPP), Frame Relay, Multilink Frame Relay (MLFR) (FR.15 and FR.16), High-Level Data Link Control (HDLC), Serial (RS-232, RS-449, X.21, V.35, and EIA-530), PPP over Ethernet (PPPoE), and ATM

Traffic management • QoS, Class-Based Weighted Fair Queuing (CBWFQ), Weighted Random Early Detection (WRED), Hierarchical QoS, Policy-Based Routing (PBR), Performance Routing, and NBAR

 

All in all, the Cisco 3900 Series offers unparalleled total cost of ownership savings and network agility through the intelligent integration of security, wireless, and application services. If you want more info about Cisco 3900 router, you can visit Cisco’s official site.

 

Notes: Cisco 3900 Routers’ Models

Product Name

Product Description

CISCO3925/K9

Cisco 3925 with 3 onboard GE, C3900-SPE100/K9, 4 EHWIC slots, 4 DSP slots, 1 ISM slot, 2 SM slots, 256MB CF default ,1 GB DRAM default ,IP Base

CISCO3945/K9

Cisco 3945 with 3 onboard GE, C3900-SPE150/K9, 4 EHWIC slots, 4 DSP slots, 1 ISM slot, 4 SM slots, 256MB CF default ,1 GB DRAM default ,IP Base

CISCO3925E/K9

Cisco 3925 with 4 onboard GE, C3900-SPE200/K9, 3 EHWIC slots, 3DSP slots, 2 SM slots, 256MB CF default ,1 GB DRAM default ,IP Base

CISCO3945E/K9

Cisco 3945 with 4 onboard GE, C3900-SPE250/K9, 3 EHWIC slots, 3 DSP slots, 4 SM slots, 256MB CF default ,1 GB DRAM default ,IP Base

 

More price and sales details of Cisco 2900 series router offered at routerswitch.com.

 

Cisco 3900 Series Comparison

http://www.cisco.com/en/US/products/ps10536/prod_series_comparison.html

How to Save the Cisco 3560 Switch Configuration

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-C3560V2-24TS-S,WS-C3560V2-48TS-E or WS-C3560G-48TS-S to get more info related to this topic.

Cisco ISR 2811, How It Fits for Your Network?

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When you’ve been around the IT reviewers’ block a few times, there are certain words that, if we’re being honest here, you don’t associate with Cisco.

 

For example, “interesting”, “innovative” or “value for money” spring to mind from recent years. Then, suddenly here’s a product that meets all of those criteria. From Cisco, the 2800 series of ISRs or Integrated Services Routers is in the middle of a triple-layer range of totally revised branch office routers. The Cisco 2811 we’re looking at here ships with built-in virtual private network (VPN) hardware encryption and acceleration, firewall, IDS/IPS, NAT, QoS support and IP telephony functionality. This comes courtesy of Cisco’s Call Manager Express and Cisco Unity IP telephony suites and consists of an IP telephony, voice mail and auto attendant solution, which can effectively replace a PBX in the small/medium/branch office. Management wise, in addition to the classic Cisco CLI, Cisco’s Router and Security Device Manager (SDM) GUI (in release 2.0 format) is also packaged.

 

Significant architectural changes – amounting to more than just popping a faster processor and more memory in place – and including the addition of ASICs to create a switch fabric type architecture, have resulted in this new range having several times more performance capacity than Cisco’s previous generation products. So much so that the company is claiming full wire-speed performance across the box.

 

In this case, “wire speed” is directly related to the particular network interface in question – namely, this is not a device that does everything all 100Mbit/s (or 200Mbit/s full-duplex) just because some of the interfaces are Fast Ethernet. For example, wire speed” over an E1 connection is 2Mbit/s. Now, here’s a clue to the nature of the ISR. It is a totally modular product. What you get is a base chassis and a whole host of features, in addition to which you have an enormously wide range of module options, depending on what exactly you want to use the product for, and across what type of connections.

 

The Cisco 2811 router comes with four module slots – ours were filled with a couple of E1/G703 WAN cards, a four-port “voice” connection –for directly connecting analogue phones or other telephony equipment to and a four-port Ethernet (10/100) switch, PoE enabled. Other module options are far too numerous to mention but, for example, on the WAN interface side alone this could include various flavors of ISDN and DSL. Two Fast Ethernet ports are included as standard – one for the internal network, one for the external. Higher up the 2800 range, these are 10/100/1000 copper ports. A console port, management Ethernet port and two USB ports (not currently used, but are there to support storage options and security tokens) complete the base configuration.

 

On the voice side, significant advances in voice trunk and station densities and digital signal processing (DSP) have enabled Cisco to embed the voice technology within the router, without it taking up any module slots. The DSPs handle all secure voice, voice gateway, conferencing, and transcoding capabilities, combined with call processing integrated within Cisco IOS software, along with optional voice mail and automated attendant in advanced integration modules (AIMs) – yet more Cisco-ese. This sounds promising for the ability to run the router pretty well flat-out while maintaining all the voice services, something we obviously put to the test (see later).

 

The array of security features form part of what Cisco calls its “Self-Defending Network security strategy”. By this it means that you can configure the Cisco 2811 to be the first line of defense – or the only line of defense – against an attack on your network and let it just get on with the job. Given that this device is intended for branch offices, it is not surprising to see that – courtesy of the SDM GUI – it comes with a number of wizards for setting up features such as VPNs (numerous options here), Firewall and IPS. In all cases there are default setups you can opt for, or custom alternatives. As part of the configuration it is also possible to define QoS parameters for real time and “business critical” traffic, in terms of what percentage of bandwidth is reserved for each, what the priority level is, and what protocols are supported by each traffic “type”.

 

Whereas, in truth, Cisco’s “GUI” management alternative is usually a minimalist attempt whose primary function is to ensure that you use the CLI, with SDM 2.0 it is both an attractive and truly functional interface. The only problem is that it is slow. So, come on Cisco, you’ve speeded the rest of the ISR up, now do the GUI too.

 

For the test, we created a simulated Internet connection, using Spirent WebAvalanche and WebReflector test devices to create web traffic and servers. We configured the 2811 with one internal and one external network, plus a voice network, on separate VLANs. In order to test the IP telephony functionality we attached some Cisco 7960 IP Phones. These are configured separately to the ISR’s data functions, either via CLI or a browser-based manager. With compression enabled, each voice channel took around 20Kbit/s of bandwidth. We ran a whole series of functionality tests covering everything from messaging to hunt group calls without problems.

 

We then created a series of tests, generating simulated Internet users. In line with Cisco’s tentative recommendation of up to 500 users for the 2811, the test increased users in steps up to this limit. We repeated the test several times, on each occasion enabling another feature, then another, then another – such as Firewall, then VPN, then IPS – and compared performance, across tests, plus the 2811’s CPU and memory utilization each time. We found a gradual degradation in performance as each feature was enabled, but only saw lots of failed connections towards the end of each test run, when the number of virtual users was more than 400. What we did see was that the 2811 CPU utilization quickly went up to 100 percent with multiple features enabled, though memory usage was relatively low.

 

Despite this, we tested the IP telephony features during each test, and even at 100 percent utilization, had no problems at all, which shows that the architecture works. We also set QoS for real time traffic to 70 percent reserved bandwidth, including support for RTSP (streaming video) traffic and set up a streaming video test as part of the simulated traffic. We achieved 66 percent (looking for 70 percent) which is pretty good.

 

In all, Cisco 2811 was up and running non-stop in our labs for over two weeks and survived quite a hammering without any enforced reboots. With the ISR, Cisco describes routing as being “just another service” and, for once, this isn’t mere marketing talk but does sum up the product – routing is indeed just one of many services it offers.

Note: Cisco 2811 Price info click here:

http://www.router-switch.com/cisco2811-p-180.html

How to Configure a Cisco Router

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?

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

Reviews on Cisco 1841 Routers

Cisco 1841 router is intended for use in small and medium branch offices.  This router is a low-end device making it one of the cheaper models produced by Cisco, and also Cisco 1841 is enterprise class and quite reliable.  As we expect, cisco 1800 series 1841 uses the IOS software and uses Cisco standard cards to provide nearly any type of interface we want in it. 

 

Many people in IT are familiar with Cisco hardware and IOS so configuration and maintenance should be easier to attain than with another brand.  This is rack mountable making it fit much better into the wiring closet.  However it does only have a single power supply reflecting its intended place in the satellite offices rather than central routing for a large company. 

 

This particular model/CISCO 1841 series comes with the following features:

  • 2 10/100  Ethernet ports  (copper - RJ45)
  • 2 Wan Interface Card (WIC) slots for the ports of your choice
  • 1 internal expansion slot
  • standard pair of console/auxiliary console ports
  • 1 USB port for console access (local device management)
  • 128 Meg RAM; only expandable to 384 Meg. 
  • 1U height

 

The Cisco 1841 routers come with three-speed fans which are controlled by a thermostat in the chassis.  The fan speed varies based on cooling demands which reduces noise and fan wear. Cisco 1841 comes with internal clocks, but is dependent on a non-replaceable battery.  Should the battery ever fail you will need to return the router to Cisco for battery replacement, although it should be covered by the warrantee.     

 

If you intend to use VoIP you will need a separate appliance as precio router cisco 1841 does not support either voice or VoIP despite having two WICs.  As with most low-end routers having only one power supply is a bane, although with most typical locations it would be installed in, it simply means not being allowed redundant power supplies, and breakers.  The Cisco 1841 router is a fine choice for a field office or a small office with less than 300 or so users depending on how they use it.  It is overkill for a job of less than 20 nodes where I’d recommend a smaller router or a PIX firewall.   It should be able to handle NAT, having more than one route to the internet or headquarters, as well as a reasonable amount of access control lists (ACLs).

 

If you want to get info about 1841 router price  just go Router-switch.com