Originally Posted by
logmeinvietnam
- DRAM memory (Std/Max.): 128/256MB
- Flash memory (Std/Max.): 24/52MB
- 1-port G.SHDSL (2-wire and 4-wire support)
- 4-port 10/100Mbps managed switch with VLAN support
- Optional 802.11b/g secure wireless LAN (option)
Theo thông tin như trên thì chưa chắc 4 port FastEthernet có chức năng layer 3.
Nếu layer 2 thì không xin IP được từ ISP.
Giờ bạn vào
interface FastEthernet0
no switchport
Sau đó gõ lại hai lệnh bên dưới
pppoe enable
pppoe-client dial-pool-number 1
Nếu no switchport không chạy thì switch không có chức năng layer. Lúc này bạn chỉ tận dụng được các chức năng của switch layer 2 như chia vlan, trunk, ...
Cisco 870 Series of integrated services routers are fixed-configuration routers that support multiple types of DSL technologies, broadband cable, and Metro Ethernet connections in small offices (Figures 1 and 2). They provide the performance needed to run concurrent services, including firewall, intrusion prevention, and encryption for VPNs; optional 802.11b/g for WLAN networking; and quality of service (QoS) features for optimizing voice and video applications. In addition, the Cisco Router and Security Device Manager (SDM) Web-based configuration tool simplifies setup and deployment (Figure 3), and centralized management capabilities give network managers visibility and control of the network configurations at the remote site.
Cisco 870 Series integrated services routers offer:
• High performance for broadband access in small offices
• Enhanced security, including:
–Stateful Inspection Firewall
–IP Security (IPSec) VPNs (Triple Data Encryption Standard [3DES] or Advanced Encryption Standard [AES])
–Intrusion prevention system (IPS)
–Antivirus support through Network Admission Control (NAC) and enforcement of secure access policies
• 4-port 10/100 managed switch with VLAN support
• Secure WLAN 802.11b/g option with use of multiple antennas
• Easy setup, deployment, and remote management capabilities through Web-based tools and Cisco IOS® Software
The Cisco 870 Series is ideal for small remote offices and teleworkers that need to be connected to larger enterprise networks. When extending corporate networks to numerous remote sites, network resources must remain secure while giving users access to the same applications found in a corporate office. This applies to both data and voice applications, where IP phones can be used to extend a corporate voice extension to the remote office. When users require WLAN access, visibility and control of network security is even more critical at the remote site. The Cisco 870 Series meets this need with a single device that combines integrated 802.11b/g capabilities with security features such as Wi-Fi Protected Access (WPA), including authentication with IEEE 802.1X with Cisco Extensible Authentication Protocol (LEAP) and Protected EAP (PEAP), and encryption with WPA Temporal Key Integrity Protocol (TKIP). (See Wireless Solution overview and Security Data Sheet for more information).
Service providers and value-added resellers can take advantage of the Cisco 870 Series to provide a true business-class broadband service. Business customers are using broadband access to connect to the Internet or to connect offices together, and require a platform that incorporates security without sacrificing performance. Many of these customers are connecting computers in offices through WLANs; having a single device for both WAN and WLAN access provides a new option for managed services. These customers also require a higher level of support to keep their networks up and running. Services with these customers should be simple to set up, while allowing a level of remote management and troubleshooting to quickly address support inquiries. The Cisco 870 Series meets the requirements of small offices and managed services providers.
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