Filter
Top Products
4-20
C7200 VSA (VPN Services Adapter) Installation and Configuration Guide
OL-9129-02
Chapter 4 Configuring the VSA
Basic IPSec Configuration Illustration
Note In the preceding example, the encryption DES of policy 15 would not appear in the written configuration
because this is the default value for the encryption algorithm parameter.
A transform set defines how the traffic will be protected:
crypto ipsec transform-set auth1 ah-md5-hmac esp-des esp-md5-hmac
mode tunnel
Note In the preceding example, the mode tunnel would not appear in the written configuration because this is
the default value for the transform-set.
A crypto map joins the transform set and specifies where the protected traffic is sent (the remote IPSec
peer):
crypto map toRemoteSite 10 ipsec-isakmp
match address 101
set peer 10.2.2.3
set transform-set auth1
The crypto map is applied to an interface:
interface Serial0
ip address 10.0.0.3
crypto map toRemoteSite
An IPSec access list defines which traffic to protect:
access-list 101 permit ip host 10.0.0.2 host 10.2.2.2
access-list 101 permit ip host 10.0.0.3 host 10.2.2.3
Router B Configuration
Specify the parameters to be used during an IKE negotiation:
crypto isakmp policy 15
encryption des
hash md5
authentication pre-share
group 2
lifetime 5000
crypto isakmp key 1234567890 address 10.0.0.3
crypto isakmp identity address
A transform set defines how the traffic will be protected:
crypto ipsec transform-set auth1 ah-md5-hmac esp-des ah-md5-hmac
mode tunnel
Note In the preceding example, the parameter “mode tunnel” would not appear in the written configuration
because this is the default value for this configuration.