Used Cisco Switches and Routers
Used Cisco
Cisco is a worldwide leader in providing the hardware and software solutions of LAN and WAN. The head office of Cisco Company is in San Francisco and the branches and authorized dealers of Cisco currently exist in most of the countries in the world therefore Cisco hardware devices are used in every region around the globe. The software solution provided by Cisco is the Cisco IOS software based on CLI (Command Line Interface) that is used in Cisco manageable devices.
Used Cisco Equipment
Cisco currently deals in various series and models of different hardware devices such as Routers, Switches, Access servers, Access points, PIX Firewall and some other devices and equipments used in Voice and Security networks. Cisco deals in both new and or refurbished devices. You can implement new or used cisco equipment for increasing the performance of your network or internetwork.
Used Cisco Switches
Topology is the physical layout of the network. Star topology is using mostly in the small, medium and large networks. In star topology all the nodes are connected centrally with a device which is possibly a hub or a switch. Hubs are totally obsolete because switch is the faster and better device then hub therefore nowadays switches are mostly used in local area networks. Switch is basically a device works on layer 2 of the OSI Layer Model i-e Data Link Layer. Switch maintains a database called MAC address table by learning MAC addresses of the connecting devices. By default switch maintains the database dynamically.
Cisco also recommends switches to connect local area networks for faster and better communication. Cisco switches are manageable device with Command Line Based Cisco IOS software. You can use cisco switches for better management of your LAN. Each manageable switch has a console port for administratively management and basic configuration in a new or unconfigured switch. There are various models in Cisco switches like Cisco Catalyst 1900, Cisco Catalyst 2950, Cisco Catalyst 3550, Cisco Catalyst 5000, Cisco Catalyst 6500 and Cisco Catalyst 8500 series etc. The basic difference in different series and models is the port density and capacity of the switch such as the number of Ethernet, Fast Ethernet and Gigabit ports and the ATM module on the Cisco switch. The series also varies by the version of Cisco IOS software that is installed in Cisco Switches.
The following are some of the important series and models of Cisco Catalyst Switches:
- Cisco 1500 series micro switch
- Cisco 1548 series micro switch
- Cisco 1900 series IOS based Catalyst switch
- Cisco 2900 series IOS based Catalyst switch
- Cisco 3550 series Catalyst switch
- Cisco 5000 series Catalyst switch
- Cisco 6500 series Catalyst switch
- Cisco 8500 series Catalyst switch
Used Cisco Routers
Whenever two or more networks connecting with each other for communication and to share the data and resources is called WAN. You must have to use routers for connecting different network IDs. Internet is a great example of WAN Environment. That's why routers are mostly implemented in ISP sectors and backbone exchanges although it is an equally important device in medium or big organizations of any type such as University Campuses, Banking zone and the Industrial sector. Multiple vendors deals in the hardware based routers. Router is basically a manageable device with a console port although routers of some vendors are not manageable. Routers work on layer 3 of the OSI Model. A router has a database called IP Routing table in which the router learns the network ID of the IP addresses of the connecting networks.
Cisco deals in manageable routers of different series and models starting from 700 series routers to 12000 series GSR routers with a complete CLI based Cisco IOS software. These series and models vary by modules, slots, port density, port capacity and the version of Cisco IOS. Cisco routers have some extra features including security and voice modules.
The following are some of the important series and models of Cisco Routers:
- Cisco 700 series router
- Cisco 1000 series router
- Cisco 1600 series modular router
- Cisco 2500 series router
- Cisco 2600 series modular router with voice module
- Cisco 3600 series modular router with voice module
- Cisco 5300 series Access Server with Asynchronous port
- Cisco 7200 series router with six extra modules
- Cisco 12000 series GSR router
Used Cisco Routers and Switches
It is an undeniable fact that Cisco routers and switches are more costly as compare to the routers and switches by other vendors in the industry but they are more reliable, dependable and scalable then the devices by other vendors. That's why most of the quality and performance conscious industry used cisco switches and routers.
If a company has multiple branch offices required to be connected with a central site using Cisco routers and switches. Then you should use Cisco branch office solution such as 2500 series or 2600 series router. The local area network of each branch office obviously used cisco switch to connect a segment and if the branch office has more than one segment then the switch of each segment should be connected with a backbone Cisco 2900 series switch in the branch office. Then one of the 100baseT Fast Ethernet interfaces of the backbone 2900 series Cisco Catalyst Switch should be connected with the AUI Ethernet interface of the Cisco 2500 series branch office router to connect the router with LAN. The serial interface of the branch office router must be connected with one of the serial interface of 7200 series central site router and the IP Routing process must be start on either routers.
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