Cisco 2921 User Manual

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Cisco 3900 Series, Cisco 2900 Series, and Cisco 1900 Series Integrated Services Routers Generation 2 Software Configuration Guide
Chapter Configuring Security Features
Configuring VPN
The examples shown in this chapter apply only to the endpoint configuration on the Cisco 3900 series,
2900 series, and 1900 series ISRs. Any VPN connection requires both endpoints to be properly
configured in order to function. See the software configuration documentation as needed to configure
VPN for other router models.
VPN configuration information must be configured on both endpoints. You must specify parameters
such as internal IP addresses, internal subnet masks, DHCP server addresses, and Network Address
Translation (NAT).
• “Configure a VPN over an IPSec Tunnel” section on page 134
• “Create a Cisco Easy VPN Remote Configuration” section on page 143
• “Configure a Site-to-Site GRE Tunnel” section on page 146
Configure a VPN over an IPSec Tunnel
Perform the following tasks to configure a VPN over an IPSec tunnel:
• Configure the IKE Policy, page 135
• Configure Group Policy Information, page 136
• Apply Mode Configuration to the Crypto Map, page 138
• Enable Policy Lookup, page 139
• Configure IPSec Transforms and Protocols, page 140
• Configure the IPSec Crypto Method and Parameters, page 141
• Apply the Crypto Map to the Physical Interface, page 142
• Where to Go Next, page 143

Cisco 2921 Specifications

General

Ethernet LAN	Yes
Cabling technology	10/100/1000Base-T(X)
Networking standards	IEEE 802.1Q, IEEE 802.1ag, IEEE 802.3, IEEE 802.3ab, IEEE 802.3af, IEEE 802.3ah, IEEE 802.3u
Ethernet LAN data rates	10, 100, 1000 Mbit/s
Ethernet interface type	Gigabit Ethernet
Product color	Black
Rack capacity	2U
USB version	2.0
RS-232 ports	1
USB ports quantity	2
Ethernet LAN (RJ-45) ports	3
DHCP client	-
Routing protocols	BGP, EIGRP, OSPF
Supported protocols	IPv4, IPv6, IS-IS, IGMPv3, PIM SM, SSM, DVMRP, IPSec, GRE, BVD, MPLS, L2TPv3, PPP, MLPPP, MLFR, HDLC, RS-232, RS-449, X.21, V.35, EIA-530, PPPoE, ATM
Firewall security	Cisco IOS
Operating altitude	0 - 3000 m
Non-operating altitude	0 - 4570 m
Storage temperature (T-T)	-40 - 70 °C
Operating temperature (T-T)	0 - 40 °C
Storage relative humidity (H-H)	5 - 95 %
Operating relative humidity (H-H)	10 - 85 %
AC input voltage	100 - 240 V
Power source type	AC
AC input frequency	47 - 63 Hz
Safety	UL 60950-1, CAN/CSA C22.2 No. 60950-1, EN 60950-1, AS/NZS 60950-1, IEC 60950-1
Electromagnetic compatibility	47 CFR, ICES-003, EN55022, CISPR22, AS/NZS 3548, VCCI V-3, EN 300-386, EN 61000, EN 55024, CISPR 24EN50082-1

Weight and Dimensions

Depth	469.9 mm
Width	438.2 mm
Height	88.9 mm
Weight	13200 g