Cisco Systems 1721 用户手册

One Fast Ethernet 
(10/100BASE-TX) port

Operates in full- or half-duplex mode (with manual 
override available).

Supports autosensing for 10- or 100-Mbps operation.

Supports IEEE 802.1Q VLAN encapsulation.

Two Cisco WAN interface card 
(WIC) slots

Supports a combination of any two of the following WICs: 
ISDN BRI, 56-kbps DSU/CSU, FT1/T1 DSU/CSU, 
high-speed serial, dual-serial, ADSL, G.SHDSL, and 
Ethernet.

The WAN interface configuration can be changed as your 
network requirements change.

Console port

Supports router configuration and management with a 
directly-connected terminal or PC. Supports up to 115.2 kbps.

Auxiliary port

Supports modem connection to the router, which can be 
configured and managed from a remote location. Supports up to 
115.2 kbps.

VPN hardware-assisted 3DES 
encryption module

Provides IPSEC DES and 3DES hardware encryption.

SNMP support

Router can be managed over a network using Simple Network 
Management Protocol (SNMP).

AutoInstall support

Configuration files can be easily downloaded to the router over 
a WAN connection.

Kensington security slot

Router can be secured to a desktop or other surface using 
Kensington lockdown equipment.

Cisco ConfigMaker support

You can set up networks that include the Cisco 1721 router 
using the Cisco ConfigMaker application, a wizards-based 
software tool that helps you easily configure and address Cisco 
routers, access servers, hubs, switches, and networks.

Support for Cisco IOS software 
features

Supports IP, IPX, AppleTalk, IBM, Open Shortest Path First 
(OSPF), NetWare Link Services Protocol (NLSP), Resource 
Reservation Protocol (RSVP), encryption, network address 
translation, and the Cisco IOS Firewall Feature Set.