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The Cisco 1720 Modular Access Router and the enhanced Cisco 1721 Modular Access Router are designed to help organizations embrace the productivity benefits of e-business applications. The Cisco 1721 and 1720 routers enable e-business by delivering secure Internet, intranet, and extranet access with virtual private networks (VPNs) and firewall technology. The Cisco 1721 and 1720 routers offer:
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Versatile e-business WAN access solution.
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Wide array of WAN access options, including high-speed business-class DSL
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High-performance routing with bandwidth management
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Inter-virtual LAN (VLAN) routing (Cisco 1721 only)
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VPN access with firewall option
The Cisco 1721 is an enhanced version of the award-winning Cisco 1720 Modular Access Router. The Cisco 1721 offers higher performance, additional functionality, and increased memory capacity over the Cisco 1720. In addition, the Cisco 1721 supports standards-based IEEE 802.1Q VLAN routing, which enables enterprises to set up multiple VLANs and route between them for added security within the internal corporate network.
Powered by Cisco IOS Software, the Cisco 1721 and 1720 routers provide a cost-effective solution for small and medium businesses and enterprise small branch offices to support e-business applications through a comprehensive feature set in a compact design.
The Cisco 1721 and 1720 offer the following key features:
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A RISC processor to support high-performance routing, encryption, and broadband services
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One autosensing 10/100 Fast Ethernet port
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Two WAN interface card (WIC) slots that support the same data WAN interface cards as the Cisco 1600, 2600, and 3600 routers
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One auxiliary (AUX) port (up to 115.2-kbps asynchronous serial)
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One console port
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One internal expansion slot for the hardware-assisted VPN encryption card (MOD1700-VPN)
Table 18-121: Cisco 1721 and 1720 Product Comparison
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Feature |
Cisco 1721 |
Cisco 1720 |
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Routing performance (based on 64-byte packet) |
12,000 pps |
8,400 pps |
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DRAM (default/maximum) |
32 MB/96 MB |
32 MB/48 MB |
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Flash (default/maximum) |
16 MB/16 MB (Nonupgradable) |
8 MB/16 MB |
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IEEE 802.1Q VLAN routing |
Yes |
No |
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Encryption module LED indicator |
Yes |
No |
The Cisco 1700 Series supports the value of end-to-end Cisco network solutions with the following benefits:
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Flexibility
The modular Cisco 1721 and 1720 adapt easily to fit the needs of growing businesses. Interchangeable WAN interface cards enable easy additions or changes in WAN technologies without requiring a forklift upgrade of the entire platform. Modular data slots enable users to tailor data services as needed.
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Security
The Cisco 1721 and 1720 support hardware-assisted wire-speed Triple Digital Encryption Standard IP Security (3DES IPSec) VPN encryption (using optional VPN module), a Cisco IOS Software-based stateful inspection firewall, and an intrusion detection system (IDS) that allows customers to keep their data safe.
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Business-class DSL
Business-class DSL is delivered through the optional asymmetric DSL (ADSL) or symmetrical high-bit rate DSL (G.shdsl) WICs. The Cisco 1700 Series business-class DSL solution combines the cost benefits of DSL service with the advanced routing capability required for business use of the Internet. Through enhanced DSL quality-of-service (QoS) features, performance levels for mission-critical applications and toll-quality voice/data integration are guaranteed.
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Traffic management
The Cisco 1721 and 1720 are based on Cisco IOS Software, the accepted standard for Internet operations. Cisco IOS Software allows traffic prioritization by user or application, ensuring that the most strategic e-business applications and time-sensitive applications perform as expected.
The Cisco 1721 and 1720 routers are part of the end-to-end Cisco VPN solution. VPNs create secure connections via the Internet to connect geographically dispersed offices, business partners, and remote users while providing security, traffic prioritization, management, and reliability equal to that of private networks.
By supporting industry standards, IPSec, Layer 2 Tunneling Protocol (L2TP), and DES and 3DES, the Cisco 1721 and 1720 routers deliver robust VPN solutions to ensure data privacy, integrity, and authenticity.
The optional VPN hardware encryption module for Cisco 1721 and 1720 routers further optimizes VPN encryption performance. By offloading encryption tasks to the VPN module, the router processor is freed to handle other operations. The VPN module accelerates the rate at which encryption occurs, speeding the process of transmitting secure data, a critical factor when using 3DES encryption.
The Cisco 1721 and 1720 routers offer integrated security features, including stateful inspection firewall functionality and IDS as an optional Cisco IOS Software feature. By deploying Cisco IOS Software firewall functionality, customers do not need to purchase or manage multiple devices, thus simplifying network management and reducing capital costs.
Cisco IOS Software firewall security features include access control lists (ACLs), user authentication, authorization, and accounting (such as Password Authentication Protocol/Challenge Handshake Authentication Protocol [PAP/CHAP], TACACS+, and Remote Access Dial-In User Service [RADIUS]). These security features provide the optimal level of firewall protection to customers.
The Cisco 1721 and 1720 routers support business-class DSL through the optional ADSL or G.shdsl WICs.
The Cisco 1721 and 1720 business-class DSL solution combines the cost benefits of DSL service with the advanced routing capability required for business use of the Internet. Through enhanced DSL QoS features, performance levels for mission-critical applications are guaranteed.
When equipped with optional Ethernet WICs, the Cisco 1700 Series supports a two- or three-Ethernet configuration, enabling deployment with an external broadband modem (such as DSL, cable modem, or wireless modem)-often supplied by a service provider as a demarcation point and deployment of a demilitarized zone (DMZ).
The Cisco 1721 and 1720 offer a broad set of features designed to allow businesses to attain maximum benefits on their investment and to easily deploy e-business solutions.
Table 18-122: Key Features and Benefits of the Cisco 1721 and 1720
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Features |
Benefits |
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Flexibility and Investment Protection |
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Modular architecture |
Wide array of WAN options provide flexibility and investment protection by accommodating future technologies while providing a solution to meet today`s needs |
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WAN interface cards shared with Cisco 1600, 2600, and 3600 routers |
Reduces cost of maintaining inventory
Offers lower training costs for support personnel
Protects investments through reuse on various platforms |
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Full Cisco IOS support, including multiprotocol routing, QoS |
Provides industry`s most robust, scalable, and feature-rich internetworking software support using the accepted standard networking software for Internet and private WANs
Constitutes part of the Cisco end-to-end network solution |
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Quality of Service (QoS) |
Offers support for advanced QoS features such as the Resource Reservation Protocol (RSVP), Weighted Fair Queuing (WFQ), and IP Precedence to reduce recurring WAN costs
QoS features (such as committed access rate [CAR], policy routing, low-latency queuing [LLQ], generic traffic shaping [GTS], Frame Relay traffic shaping [FRTS], and RSVP) allocate WAN bandwidth to priority applications for improved performance |
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Expansion slot on motherboard |
Allows expandability to support services such as hardware-assisted encryption |
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Complete Security and VPN Capability |
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Stateful inspection firewall (the Cisco IOS Firewall includes context-based access control for dynamic firewall filtering, denial-of-service detection and prevention, Java blocking, and real-time alerts) |
Allows internal users to access the Internet with secure, per-application-based, dynamic access control while preventing unauthorized Internet users from accessing the internal LAN |
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High-Performance VPN encryption (IPSec DES and 3DES VPN module for high-speed, hardware-based encryption) |
Provides high-speed hardware-assisted encryption up to T1/E1 performance Enables creation of wire-speed VPNs by providing industry-standard data privacy, integrity, and authenticity as data traverses public networks |
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Device authentication and key management (Internet Key Exchange [IKE], X.509v3 digital certification, support for Certificate Enrollment Protocol (CEP) with certificate authorities (CAs) such as Verisign and Entrust) |
Ensures proper identity and authenticity of devices and data
Enables scalability to very large IPSec networks through automated key management |
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VPN tunneling with IPSec, Generic Routing Encapsulation (GRE), L2TP, L2F |
Allows any standards-based IPSec or L2TP client to interoperate with Cisco IOS tunneling technologies |
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Business-Class DSL |
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Supports ADSL and G.shdsl with advanced QoS features (Multilink PPP [MLP] with link fragmentation and interleaving [LFI], LLQ, Weighted Random Early Detection [WRED], CAR, differentiated services) |
Takes advantage of broadband access technologies such as ADSL or G.shdsl to increase WAN connectivity speeds and reduce WAN access costs Delivers business-class broadband access
Offers efficient use of bandwidth |
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Simplified Management and Ease of Deployment |
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Device integration (integrated router, firewall, encryption, VPN, tunnel server, data/channel service unit [DSU/CSU], and Network Termination 1 [NT1] in a single device) |
Reduces costs and simplifies management compared to solutions based upon multiple, separate devices |
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Manageable via Simple Network Management Protocol (SNMP) (CiscoView, CiscoWorks 2000, Telnet, and console port) |
Allows central monitoring, configuration, and diagnostics for all functions integrated in the Cisco router, reducing management time and costs |
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Supports Cisco ConfigMaker, SETUP Configuration Utility |
Simplifies and reduces deployment time and costs with graphical LAN/VPN policy configurator; command-line, context-sensitive configuration questions |
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VLAN support (Cisco 1721 only) |
Enables inter-VLAN routing via the standards-based IEEE 802.1Q
Available in all Cisco IOS feature sets, including base Cisco IOS feature set |
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Support for Cisco AutoInstall |
Configures remote routers automatically across a WAN connection to save cost of sending |
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LED status indicators |
Provide at-a-glance indications for power, VPN module (Cisco 1721 only), network activity, and interface status |
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Reliability |
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Dial-on-Demand routing |
Allows automatic backup of WAN connection in case of a primary link failure |
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Dual bank flash memory |
Backup copy of the Cisco IOS Software can be stored in Flash memory |
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Hot Standby Router Protocol (HSRP) |
Provides high network availability |
Hardware
Table 18-123: Technical Specifications for the Cisco 1721
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Description |
Specification |
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Physical Interfaces/Ports |
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One 10/100BASE-TX Fast Ethernet port (RJ-45) |
Automatic speed detection
Automatic duplex negotiation
IEEE 802.1Q VLAN routing (Cisco 1721 only) |
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Two WAN interface card slots |
Supports any combination of two WAN interface cards as shown in Table 3 |
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One auxiliary (AUX) port |
RJ-45 jack with EIA/TIA-232 interface
Asynchronous serial data terminal equipment (DTE) with full modem controls Carrier Detect, data set ready (DSR), Request To Send (RTS), Clear To Send (CTS)
Asynchronous serial data rates up to 115.2 kbps |
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One console port |
RJ-45 jack with EIA/TIA-232 interface
Asynchronous serial DTE
Transmit/receive rates up to 115.2 kbps (default 9600 bps, not a network data port)
No hardware handshaking such as RTS/CTS |
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One internal expansion slot for support of hardware-assisted services such as VPN encryption (up to T1/E1 performance) |
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WAN Interface Specifications (Optional) |
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Synchronous serial interfaces on serial WAN interface cards |
Interface speed: up to 2.0 Mbps (T1/E1)
Synchronous serial protocols: Point-to-Point Protocol (PPP), High-Level Data Link Control (HDLC),
Link Access Procedure, Balanced (LAPB), IBM Systems Network Architecture (SNA) Synchronous serial WAN services: Frame Relay, X.25, SMDS
Synchronous serial interfaces supported on the WIC-1T, WIC-2T, and WIC-2A/S cards: V.35, EIA/TIA-232, EIA/TIA-449, X.21, EIA-530 |
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Asynchronous serial interfaces on serial WAN interface cards |
Interface speed: up to 115.2 kbps
Asynchronous serial protocols: PPP, Serial Line Internet Protocol (SLIP)
Asynchronous interface: EIA/TIA-232 |
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ADSL WAN interface card |
Supports ATM adaptation layer 5 (AAL5) services and applications
Interoperates with Alcatel DSL access multiplexer (DSLAM) with Alcatel chipset and Cisco 6130/6260 DSLAM with Globespan chipset
Complies with ANSI T1.413 issue 2 and ITU 992.1 (G.DMT) |
|
G.shdsl WAN interface card |
Based on the ITU G.991.2, delivers symmetrical data rates from 192 kbps to 2.3 Mbps; speeds vary, depending on loop length and line conditions |
|
ISDN WAN interface cards |
ISDN dialup and ISDN DSL (IDSL) at 64 and 128 kbps
Encapsulation over IDSL, Frame Relay, and PPP |
Table 18-124: Power Specifications for the Cisco 1721
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Description |
Specification |
|
Locking connector on power socket |
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AC input voltage |
100 to 240 VAC |
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Frequency |
47 to 64 Hz |
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AC input current: |
0.5A |
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Power dissipation |
20W (maximum) |
Table 18-125: Physical and Environmental Specifications for the Cisco 1721
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Description |
Specification |
|
Dimensions (H x W x D) |
3.1 x 11.2 x 8.7 in. (7.85 x 28.4 x 22.1 cm) |
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Weight (maximum) |
2.9 lb (1.32 kg) |
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Operating temperature |
32 to 104?F (0? to 40?C) |
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Storage temperature |
-4 to 149?F (-20? to 65?C) |
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Relative humidity |
10 to 85% noncondensing operating;
5 to 95% noncondensing, nonoperating |
Table 18-126: Regulatory Approvals for the Cisco 1721
|
Description |
Specification |
|
Safety |
UL 1950
CSA 22.2-No. 950
EN60950
EN41003
AUSTEL TS001
AS/NZS 3260
ETSI 300-047
BS 6301 (power supply) |
|
EMI |
AS/NRZ 3548 Class A
Class B
FCC Part 15 Class B
EN60555-2 Class B
EN55022 Class B
VCCI Class II
CISPR-22 Class B |
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Immunity |
55082-1 Generic Immunity Specification Part 1: Residential and Light Industry
IEC 1000-4-2 (EN61000-4-2)
IEC 1000-4-3 (ENV50140)
IEC 1000-4-4 (EN61000-4-4)
IEC 1000-4-5 (EN61000-4-5)
IEC 1000-4-6 (ENV50141)
IEC 1000-4-11
IEC 1000-3-2 |
|
Network Homologation |
|
USA: |
ATIS/ACTA -TIA/EIA/IS - 968 (Former part 68), TIA/EIA/IS-883, T1.TRQ.6-2001, TIA/EIA/TSB-129 |
|
Canada: |
CS-03 |
|
Japan: |
JATE |
|
Australia: |
AS/ACIF: S-02, S-043, C-559; ACA TS-002, TS-003, TS-006, TS-016, TS-031 |
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New Zealand: |
PTC107, PTC200, PTC211, PTC270, CTR3 |
|
European Union + Switzerland: |
Directive 1999/5/EC |
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Russia: |
CTR2, CTR3, CTR21, ITU-G.992.1, ITU-G991.2 |
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Belarus: |
CTR3, CTR21 |
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Czechia |
CTR2, CTR3, CTR21 |
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Poland: |
CTR3, PB-TE ITU-G.992.1 |
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Hungary: |
CTR2, CTR3, CTR21, ITU-G.992.1 |
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Singapore: |
IDA: TS-PSTN1, TS-ISDN1, TS-ADSL |
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Taiwan: |
PSTN01, IS6100, ID002 |
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Brazil: |
CTR3, CS-03 |
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Mexico: |
CTR3, CS-03, FCC part 68 |
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South Africa: |
CTR3 |
|
The Cisco 1700 Series, including the Cisco 1721, is in compliance with the requirements of the countries for distribution. The Cisco 1700 Series conforms to Safety, EMI, Immunity, and Network homologation standards. Details can be obtained through your Cisco reseller or account manager. |
Software
All Cisco 1700 models are equipped with an internal expansion slot to support an optional field-installable hardware VPN encryption module. The VPN encryption module offloads encryption processing from the Cisco 1700 Series RISC processor, providing performance up to T1/E1 speeds. The VPN encryption module (MOD1700-VPN) supports a maximum of 100 remote access tunnels.
Cisco 1721 and 1720 routers support a full range of Cisco IOS software features, including multiprotocol routing, QoS, VPN, firewall/IDS, and legacy IBM protocol and applications in use today.
The Cisco 1721 and 1720 routers are shipped with the base Cisco IOS feature sets supporting IP routing and standards such as Network Address Translation (NAT), Open Shortest Path First (OSPF), RADIUS, Remote Monitoring (RMON), VLAN routing, basic QoS feature (Weighted Fair Queuing), and Next Hop Resolution Protocol [NHRP]).
Cisco IOS IP Plus feature sets contain L2TP, L2F, Border Gateway Protocol (BGP), IP multicast, Frame Relay switched virtual circuit (SVC), RSVP, PPP over Ethernet client, NetFlow, the Netware Link Services Protocol (NLSP), Simple Multicast Routing Protocol (SMRP), the Web Cache Control Protocol (WCCP), and the Network Timing Protocol (NTP). In addition, enhanced QoS features are also supported (LLQ, FRTS, RSVP, CEF, WRED, DiffServ, MLPP with LFI).
IPSec encryption is offered in special encryption feature sets (Plus IPSec 56 and Plus IPSec 3DES). To build an IP VPN, the recommended feature sets are IP/Firewall Plus IPSec 56 or IP/Firewall Plus IPSec 3DES.
A more detailed list of features and the memory requirements for a given feature set can be found in the Cisco IOS 1700 Release Notes.
The Cisco 1721 and 1720 support a range of network-management and ease-of-installation tools.
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CiscoWorks2000, the industry-leading Web-based network management suite, provides the ability to remotely configure, administer, monitor, and troubleshoot the Cisco 1721 and 1720. CiscoWorks2000 provides increased visibility into network behavior and quickly identifies performance bottlenecks and long-term performance trends. It also provides sophisticated configuration tools to optimize bandwidth and utilization across expensive and critical WAN links in the network.
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CiscoView, part of CiscoWorks2000, is a Web-based tool that graphically provides real-time status of the Cisco 1721 and 1720. It can drill down to display monitoring information on interfaces and provide dynamic status, statistics, and comprehensive configuration information.
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CiscoWorks Small Network Management Solution (SNMS) is a comprehensive, Web-based network management solution that provides a powerful set of monitoring, configuration, and management tools to simplify the administration of small to medium business networks and workgroups that contain up to 20 Cisco internetworking products (switches, routers, hubs, and access servers). CiscoWorks SNMS is an ideal solution for companies that need server monitoring and network management from a single application to optimize performance and maximize network productivity. With CiscoWorks SNMS, Cisco provides a cost-effective and user-friendly solution that helps Cisco customers make the optimal use of their resources. The solution provides the following:
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Web interface for all applications-CiscoWorks SNMS can be used from any browser in the network with the appropriate user authentication.
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Simple integrated installation, auto-discovery, and automated import of devices using SNMP reduces complexities and overall setup time associated with managing the network.
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CiscoWorks SNMS provides standards-based multivendor management. The WhatsUp Gold application in CiscoWorks SNMS allows administrators to view live network information, including the status of all hosts, servers, workstations, routers, other devices, and services.
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CiscoWorks SNMS grows and adapts to the changing devices in a dynamic network. Regular device updates are provided via downloadable files from Cisco.com. This scenario ensures that users can manage the most currently available Cisco devices without waiting for new versions of CiscoWorks SNMS to be released.
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Cisco ConfigMaker is a Microsoft Windows wizard-based tool designed to configure a small network of Cisco routers, switches, hubs, and other network devices from a single PC. This tool makes it easy to configure value-add security features such as the Cisco IOS Firewall Feature Set, IPSec encryption, NAT, the Dynamic Host Configuration Protocol (DHCP) server, and to establish VPN policies (including QoS and security).
The Cisco 1721 and 1720 support up to two of the WICs listed in the table below. These WICs support a wide variety of WAN technologies: Integrated Services Digital Network (ISDN), asynchronous serial and synchronous serial such as leased lines, Frame Relay, ADSL, G.shdsl, Switched 56, X.25, and Switched Multimegabit Data Service (SMDS), and single-port Ethernet. Also available are WICs that integrate a DSU/CSU into the Cisco 1721 and 1720, eliminating the support costs and complexity of deploying and managing external devices.
Table 18-127: WAN Support for the Cisco 1721 and 1720
|
WIC |
Description |
|
WIC-1T |
One-port serial, asynchronous and synchronous (T1/E1) |
|
WIC-2T |
Two-port serial, asynchronous and synchronous (T1/E1) |
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WIC-2A/S |
Two-port low-speed serial (up to 128 kbps), asynchronous and synchronous |
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WIC-1B-S/T |
One-port ISDN Basic Rate Interface (BRI) S/T |
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WIC-1B-U |
One-port ISDN BRI U interface with integrated NT1 |
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WIC-1DSU-56K4 |
One-port integrated 56/64-kbps, four-wire DSU/CSU |
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WIC-1DSU- T1 |
One-port integrated T1/fractional T1 DSU/CSU |
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WIC-1ADSL |
One-port ADSL interface |
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WIC-1ENET |
One-port 10BASE-T Ethernet interface |
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WIC-1SHDSL |
One-port G.shdsl interface |
Category: Routers
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