CISCO switches Overview

Source: Internet
Author: User

In the network industry, Cisco System Inc. is unknown. With its IOS (Internet Operating System), Cisco is an absolute leader in the multi-protocol router market. Currently, nearly 80% of routers on the Internet come from Cisco. In fact, Cisco also has a full range of network devices, including hubs, switches, access servers, hardware and software firewalls, and network management software. Cisco pays great attention to the tracking of New Technologies. Through a series of cooperation and mergers, Cisco has successfully intervened in emerging markets such as broadband access and wireless communication.
This document describes Cisco's switch product line and main products.
I. Overview
Cisco vswitch products are trademarks of Catalyst, including more than 10 series including 1900, 2800, 2900, 3500, 4000, 5000, 5500, 6000, and 8500. In general, these vswitches can be divided into two types:
The first type is a fixed configuration switch, including most models of 3500 and below. For example, 1924 is a 24-port 10 M Ethernet switch with two m upstream ports. Except for limited software upgrades, these switches cannot be expanded;
The other type is a modular switch, which mainly refers to 4000 or more models. network designers can select different numbers and models of interface boards, power supply modules and corresponding software based on network requirements.
When choosing a device, many people have a headache for long product models. In fact, Cisco has a rule for product naming. For a Catalyst switch, the product name format is as follows:
Catalyst NNXX [-C] [-M] [-A/-EN]
NN indicates the serial number of the vswitch, XX indicates the number of ports for a fixed-configuration vswitch, and XX indicates the number of slots for a modular vswitch. The-C mark indicates the interface with optical fiber, -M indicates modularization, and-A and-EN respectively indicate that the switch software is A standard board or Enterprise Edition.
Ii. Product Introduction
Currently, Cisco switches commonly used in network integration projects include the following series: 1900/2900 series, 3500 series, and 6500 series. They are used at the low end, middle end, and high end of the network respectively. The following describes the products of these series:
1. Low-end products
Let's talk about low-end products. 1900 and 2900 are typical low-end products. In fact, Cisco does not take a special advantage in the low-end switch market, because 3Com, Dlink and other companies have better performance and price ratios.
The 1900 vswitch is a typical low-end product for desktop computer access at the end of the network. It provides 12 or 24 10 m ports and 2 m ports. The M Port supports full-duplex communication and provides a port bandwidth of up to Mbps. The server's backboard bandwidth is 320 Mbps.
1900 of the software with the Enterprise Edition also supports VLAN and ISL Trunking, with a maximum of four VLANs. However, low-end products generally do not require this function.
Some models of the 1900 with 100BaseFX optical fiber interface. For example, C1912C and C1924C have a MB Tx port and a MB Fx port, and C1924F has two 100BaseFX interfaces. The main models of the 1900 Series are as follows:
C1912: 12 ports: 10 BaseTx, 2 ports: 100 BaseTx, and 1 AUI Port
C1912C: 12 ports: 10 BaseTx, 1 port: 100 BaseTx, 1 AUI port, and 1 100BaseFx Port
C1924: 24 ports: 10 BaseTx, 2 ports: 100 BaseTx, and 1 AUI Port
C1924C: 24 ports: 10 BaseTx, 1 port: 100 BaseTx, 1 AUI port, and 1 100BaseFx Port
C1924F: 24 ports, 10 BaseTx, 1 AUI port, and 1 100BaseFx Port
If some desktop computers are 2900 m in your network, the series may be more suitable. Compared with 1900, 2900 is characterized by an increase in speed. Its backplane speed can reach up to 3.2 GB and a maximum of 24 10/100 M Adaptive ports. All ports support full-duplex communication, this greatly improves the speed of desktop access. In addition to the port speed, many other performance of 2900 has also significantly improved compared with the 1900 Series. For example, 2900 of the MAC address table capacity is 16 KB, 1024 VLANs can be divided, and ISL Trunking Protocol is supported.
The product line of the 2900 series is very long. Some are common 10/100 BaseTx switches, such as C2912 and C2924, some are with Optical Fiber interfaces, such as C2924C with two 100BaseFx ports, and some are modular, such as C2924M with two expansion slots. The plug-in card of the expansion slot can be placed in the 100BaseTx module and 100baseFx module, or even the ATM module and Gigabit Ethernet Interface Card (GBIC ). The details are as follows:
C2912-XL: 12 port 10/100 BaseTx adaptive
C2912MF-XL: 2 expansion slots, 12 port 100 BaseFX
C2924-XL: 24 port 10/100 BaseTX adaptive
C2924C-XL: 22 port 10/100 BaseTX adaptive, 2 port 100 BaseFX
C2924M-XL: 2 expansion slots, 24 port 10/100 BaseTx adaptive
In the 2900 series, there are two products more unique, one is C2948G, two is the C2948G-L3. The cost of 2948G performance is good. It uses the same software as the Catalyst 5000/5500, with 48 10/100 Mbps adaptive Ethernet ports and 2 Gigabit Ethernet ports, 24g backboard bandwidth, with hot swappable redundant power supply, it has a series of fault tolerance features and network management features. On the basis of C2948G, The C2948G-L3 adds the three-layer switching capability, and the maximum three-layer packet throughput can reach 10 Mpps. However, in general, the 2900 series switches are generally used at the low end of the network. The gigabit and routing capabilities are not very important, so the two 2948 switches are not used much in actual projects.

2. Mid-range products
Let's look at the mid-end products. The 3500 series of mid-end products are widely used and representative.
The basic features of the C3500 series switches include a backboard bandwidth of up to 10 Gbps and a forwarding rate of 7.5 Mpps. It supports 250 VLANs, IEEE 802.1Q and ISL Trunking, and CGMP/Gigabit Ethernet switches, optional redundant power supply. However, the biggest feature of C3500 is management and gigabit.
In terms of management features, C3500 implements Cisco's switch cluster technology. It can interconnect 16 C3500, C2900, and C1900 series switches and manage them through one IP address. The Cisco Visual Switch Manager (CVSM) software in C3500 can also be used to conveniently set and manage switches through a browser.
In terms of gigabit features, C3500 fully supports Gigabit interface cards (GBIC ). Currently, GBIC has three types of 1000 BaseSx, which are applicable to multimode optical fiber, with a maximum distance of 550 m; 1000 BaseLX/LH; multimode/single-mode optical fiber, and a maximum distance of 10 km; basezx is applicable to single-mode optical fiber, the maximum distance is 100 km.
There are four major C3500 models:
Catalyst 3508g xl: 8 GBIC slots
Catalyst 3512 XL: 12 Port 1 0/M Adaptive, 2 GBIC slots
Catalyst 3524 XL: 24 port 10/100 M Adaptive, 2 port GBIC slots
Catalyst 3548 XL: 48 Port 10/100 M Adaptive, 2 port GBIC slots

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3. High-end products
Finally, we will introduce high-end products. For enterprise data networks, the C6000 series replaces the original C5000 series and is the most common product.
The Catalyst 6000 series switches provide high-performance, multi-layer switching solutions for the campus network. They are designed specifically for application environments that require Gigabit scalability, high availability, and multi-layer switching, it is mainly intended for backbone connections in the park.

The Catalyst 6000 series is composed of two types of switches, Catalyst 6000 and Catalyst 6500, both of which contain 6 or 9 slot models: 6006, 6009, 6506, and 6509, in particular, 6509 is the most widely used. All models support the same super engine and interface module, protecting users' investment. This series of features mainly include:
High port density. Supports up to 384 10/100 BaseTx adaptive Ethernet ports, 192 100 BaseFX optical fiber fast Ethernet ports, and 130 Gigabit Ethernet ports (GBIC slots ).
Fast. The C6500 switching backplane can be extended to 256 Gbps, and the multi-layer switching speed can be extended to 150 Mpps. The C6000 switching backboard bandwidth is 32 Gbps, and the multi-layer switching rate is 30 Mpps. Supports up to 8 Fast/Gigabit Ethernet ports connected using Ethernet Channel Technology (Fast EtherChannel, FEC or Gigabit EtherChannel, GEC), logically achieving a port rate of 16 Gbps, you can also implement port aggregation across modules.
Multi-layer switching. The C6000 series multi-layer switching module can be used for line rate IP, IPX, and IP-multicast routing.
Good fault tolerance. C6000 series with redundant super engine, redundant Load Balancing power supply, redundant fan, redundant system clock, redundant uplink, redundant switching back board (only for C6500 series ), high Availability of the system is achieved.
Rich software features. C6000 software supports a wide range of protocols, including NetFlow, VTP (VLAN Trunking Protocol), VQP (VLAN Query Protocol), ISL Trunking, HSRP (Hot Standby Router Protocol) port Security, TACACS, CGMP (Cisco Group Management Protocol), IGMP, and so on.
Iii. Conclusion
This document briefly introduces Cisco switch products commonly used in network integration projects. Exchange technologies are constantly innovating. New technologies such as layer-4 Exchange and content exchange (layer-7 Exchange) are emerging. Cisco is also constantly expanding its switch product line, such as the content switch 11000 series. However, the situation about these products needs to be described in another article.

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