S2016
| 项目 | 描述 |
| 外形尺寸（宽×高×深） | 360×42×240（mm） |
| 重量 | 3kg |
| FLASH | 8MB |
| SDRAM | 24MB |
| 端口配置 | 16个10/100Mbit/s以太网端口 2个100Mbit/s上行以太网端口 1个Console口 1个远端监控口 1个扩展槽位 |
| 可扩展模块 | 1×100Base-FX模块（单模） 1×100Base-FX模块（多模） |
| 交换容量 | 3.8Gbps |
| 包处理能力 | 2.83Mpps，所有端口支持线速转发 |
| 交换模式 | 存储转发模式（Store and Forward） |
| VLAN | 32，支持VTP ，GVRP |
| QoS | 支持符合IEEE 802.1p标准的优先级设置（2个优先级队列） |
| HGMP（华为组管理协议） | 支持 |
| 组播 | 支持GMRP，IGMP Snooping |
| Trunk | 支持 |
| 生成树协议 | 支持STP/RSTP，符合IEEE 802.1D及IEEE 802.1w |
| 链路汇聚 | 支持3个上行100Mbit/s端口的捆绑 |
| 广播风暴抑制 | 所有端口上支持基于带宽百分比的广播风暴抑制 支持手动打开/关闭此功能 |
| 端口镜像 | 支持基于端口的镜像，将特定端口的流量全部复制到监控端口 |
| MAC地址表 | 4K（2K单播、2K多播） |
| 流控 | 支持IEEE 802.3x 流控（全双工） |
| 管理 | 支持命令行、Telnet、Console口配置 支持通过脚本进行批量配置及离线配置 支持SNMP V3、RMON、HGMP Client 支持系统日志、分级告警；支持FTP、TFTP |
| 输入电压 | AC：90V~264V，47~63Hz；DC：-75V~-36V |
| 功耗 | 30W |
3550,2950替代3500xl
2960 16MB DRAM 8M flash
3500 xl 8MB DRAM 4M flash
Key Benefits of the Cisco Catalyst 3550/2950 Intelligent Ethernet Switches vs. Catalyst 3500 XL Switches
•
Advanced QoS at the edge of the network—Allows superior handling of mission-critical and bandwidth-intensive applications such as voice, video, and ERP by ensuring that traffic is classified, prioritized, and congestion is avoided at the first possible opportunity. The Catalyst 3550 and 2950 Series support 802.1p class of service (CoS) and DiffServ Code Point (DSCP) classification based on Layer 2-4 information, four egress queues per port, and sophisticated scheduling algorithms such as Weighted Round Robin (WRR).
•Sophisticated traffic management at the edge of the network—Allows complete bandwidth control to help optimize network performance by eliminating unwanted traffic. The Catalyst 3550 and 2950 Series support rate-limiting based on Layer 2-4 information.
•Security features at the edge of the network—Permit more effective security by extending the protected border to the network's outermost perimeter. The Catalyst 3550 and 2950 Series support ACLs that enable the filtering of traffic based on Layer 2-4 information.
•Multicast management at the edge of the network—Minimizes congestion and provides scalability in networks employing video. The Catalyst 3550 and 2950 Series support IGMP snooping.
•IP routing support—The Catalyst 3550 Series supports IP routing, thereby enabling the construction of scalable LANs by terminating virtual LANs (VLANs), allowing inter-VLAN IP routing, efficiently using bandwidth via load sharing, and faster failover times in the event of a link failure.
CCNA,CCNP,CCIE全套思科设备
CISCO路由器：1700、2600、2800、3600、3700、7200VXR、7500、12000全系列
CISCO交换机：2900、3500、2950、3550、3750、4500、6500、7600全系列
CISCO防火墙：501、506、520、515、525、535全系列
CISCO 模块和各系列引擎
一、思科（Cisco）路由器
Cisco Router 1721 (16M FLASH 64M MEM) (1*10/100M以太口+2*WIC插槽)
Cisco Router 1751 (16M FLASH 64M MEM) (1*10/100M以太口+2*WIC插槽)
Cisco Router 1841 (32fM FLASH 128M MEM) (1*10/100M以太口+2*WIC插槽)
Cisco Router 2501 (16M FLASH 16M MEM) (1*10M以太口+2*同步串口)
Cisco Router 2503 (16M FLASH 16M MEM) (1*10M以太口+2*同步串口+1*ISDN口)
Cisco Router 2509 (16M FLASH 16M MEM) (1*10M以太口, 2*同步串口+8个异步串口)
Cisco Router 2511 (16M FLASH 16M MEM) (1*10M以太口, 2*同步串口+16个异步串口)
Cisco Router 2514 (16M FLASH 64M MEM) (2*10M以太口+2*同步串口)
Cisco Router 2610 (16M FLASH 64M MEM) (1*10M以太口+1*NM插槽+2*WIC插槽)
Cisco Router 2611 (16M FLASH 64M MEM) (2*10M以太口+1*NM插槽+2*WIC插槽)
Cisco Router 2620 (16M FLASH 64M MEM) (1*10M/100M口+1*NM插槽+2*WIC插槽)
Cisco Router 2621 (16M FLASH 64M MEM) (2*10M/100M口+1*NM插槽+2*WIC插槽）
Cisco Router 2611XM (32M FLASH 128M MEM) (2*10M/100M口+1*NM插槽+2*WIC插槽)
Cisco Router 2621XM (32M FLASH 128M MEM) (2*10M/100M口+1*NM插槽+2*WIC插槽)
Cisco Router 2651XM (32M FLASH 128M MEM) (2*10M/100M口+1*NM插槽+2*WIC插槽）
Cisco Router 2801 (64M FLASH 256M MEM) (2*10M/100M口+4*HWIC插槽+2*PVDM）
Cisco Router 2811 (64M FLASH 256M MEM) (2*10M/100M口+4*HWIC插槽+2*PVDM+1*NME插槽）
Cisco Router 2821 (64M FLASH 256M MEM) (2*10M/100M1000M口+4*HWIC插槽+3*PVDM+1*NME插槽）
Cisco Router 2851 (64M FLASH 256M MEM) (2*10M/100M/1000口+4*HWIC插槽+2*PVDM+1*NME插槽）
Cisco Router 3620 (32M FLASH 64M MEM)
Cisco Router 3640 (32M FLASH 128M MEM)
Cisco Router 3661 (32M FLASH 64M MEM) (1*10M/100M口+6*模块化插槽)
Cisco Router 3662 (32M FLASH 64M MEM) (1*10M/100M口+6*模块化插槽)
Cisco Router 3725 (标配) (2*10/100口+2*模块化插槽+3*WIC插槽)
Cisco Router 3745 (标配) (2*10/100口+4*模块化插槽+3*WIC插槽)
Cisco Router 3825 (标配) (2*10M/100M/1000M+1*SFP插槽+2NME插槽+4HWIC插槽)
Cisco Router 3845 (标配) (2*10M/100M/1000M+1*SFP插槽+4NME插槽+4HWIC插槽)
Cisco Router 7204 (标配)
Cisco Router 7206 (标配)
Cisco Router 7204VXR (标配)
Cisco Router 7206VXR (标配)
Cisco Router 7505
Cisco Router 7507
Cisco Router 7513
--------------------------
R1 2620 64 32 2 - WIC-1T
R2 2620 64 32 2 - WIC-1T 1 - NM-2E2W
R3 3640 128 32 1 - NM-4A/S 1 - NM-2E2W
R4 3640 128 32 2 - WIC-1T 1 - NM-2E2W
R5 3640 128 32 2 - WIC-1T
R6 3825 256 64 1 - WIC-1T
SW1 3560-24TS-EDefaultDefaultN/A
SW2 3560-24TS-EDefaultDefaultN/A
SW3 3550-24-EMIDefaultDefaultN/A
SW4 3550-24-EMIDefaultDefaultN/A
----------------------------------------
What Not to Buy
Before we get started on the details, let me quickly point out some equipment that you should avoid.
First, avoid any gear with “XL” in the model name. This would mostly be switches like the Cisco 2900XL and 3500XL series. These will work, yes, but they are OLD. I have literally thrown these things in the dumpster. You can get them real cheap (for good reason), but for just a few bucks more you can get switches that will serve you much better.
Next, avoid any 830, 870, or 1600 series routers. Again, this equipment is old and you can get much more value for your dollar.
If you simply intend to earn the CCNA and go no future, your needs will be very modest. Look for good deals on 2600XM series routers (note that there are also non-XM models) with lots of flash memory and RAM. You’ll need that to run the latest version of the Cisco IOS software possible.
At a minimum, you’ll want three routers. This will allow you to connect them in a “triangle” and see the effects of dynamic routing protocols such as RIP, EIGRP, and OSPF.
What about switches? You should be looking for at least two Cisco Catalyst 2950 series switches. These come in 12-port and 24-port models (and a few have a couple of extra Gigabit ports) and support nearly everything that will be covered on your CCNA exams.
Is There a CCNP or CCIE in Your Future?
If you think that there’s a possibility that you may pursue either the CCNP or CCIE certifications after earning your CCNA, we need to make a minor adjustment or two.
First, pick up at least one Cisco Catalyst 3550 series switches. These are one type of what are referred to as “layer three switches” — in a nutshell, they are switches that can also route. You’ll need them when you begin studying for the switching portion of the CCNP exams, so you might as well get them now. The 3550s can do everything the 2950s can do, and then some.
If you initially buy 2950s and then decide that you want to “move up” to 3550s, that’s fine too. You can sell the 2950s to someone else who is just starting out, then put that money towards some 3550s.
The same 2600XM series routers will work for CCNP too. You may want to look into getting a couple of 3640 series routers as they support a few extra features and have more flexibility (with regard to the available “expansion slots” and network modules). I have and use both 2600XMs and 3640s in my lab.
My Cisco Lab
I have a mix of Cisco 2600XM and 3640 routers and Catalyst 2950 switches that I use when writing content for this site. There are a total of five routers and three switches that I use, in addition to a Cisco 3620 router (with two NM-4A/S network modules) configured as a frame-relay switch and a Cisco 2511 console server that saves me from swapping cables around all the time.
最小化的实验室环境
2511-rj x1 登录服务器
2522 x1 fr交换机
3640 x4 router
或
2611 x4 router
2950 x2 switch
这是最简单最小型的网络结构。路由器可以用2611。 也可以用3640。 3640更便宜一些。2611配两个wic-1t模块。 3640也一样。 不过3640要上一个1e2w模块后再上1t模块。每台router上有两根v.35的线缆。 再加两根直通线。 ok。 一个最小型化的ccna/ccnp试验机架就搭建起来了。建议2611的配置为16/32。 要不然有些ios跑不起来。 实验做不了。