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Cisco 1700 Series Modular Access Routers
Cisco 1721 and Cisco 1720
Figure 1:
The Cisco 1721 Router
delivers a versatile
e-business WAN access
solution.
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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:
• Wide array of WAN access options,
including high-speed business-class
digital subscriber line (DSL)
• High-performance routing with
bandwidth management
• Inter-virtual LAN (VLAN) routing
(Cisco 1721 only)
• VPN access with firewall option
The Cisco 1721 (shown below in Figure 1)
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.
Cisco Systems, Inc.
Page 1 of 12
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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:
• A RISC processor to support
high-performance routing, encryption,
and broadband services
• One autosensing 10/100 Fast Ethernet
port
• Two WAN interface card (WIC) slots
that support the same data WAN
interface cards as the Cisco 1600, 2600,
and 3600 routers
• One auxiliary (AUX) port (up to
115.2-kbps asynchronous serial)
• One console port
• One internal expansion slot for the
hardware-assisted VPN encryption card
(MOD1700-VPN)
Data Sheet