Technical information

IPSec VPN Acceleration Services Module Installation and Configuration Note

78-14459-03 Rev C0

Configuring a VPN Using the VPN Module

Using IPSec NAT Transparency

Note This section applies to VPN modules running Cisco IOS Release 12.2(14)SY or later releases.

For complete configuration information for Cisco IOS IPSec NAT transparency support, refer to this

URL:

http://www.cisco.com/en/US/products/sw/iosswrel/ps1839/products_feature_guide09186a0080110bca.html

There is no VPN module-specific configuration requirements or restrictions for IPSec NAT transparency.

Use the standard Cisco IOS configuration that is described at the above URL.

Using TopN Acceleration

Note This section applies to VPN modules running Cisco IOS Release 12.2(14)SY or later releases.

For complete configuration information for TopN acceleration support, refer to this URL:

http://www.cisco.com/en/US/products/sw/iosswrel/ps1839/products_command_reference_chapter0918

6a0080132c59.html#1170304

Using IPSec Anti-Replay Window Size Expansion

Note This section applies to VPN modules running Cisco IOS Release 12.2(14)SY or later releases.

The per-security association (SA) anti-replay window size has been increased to 64 from 32. No

configuration is required to obtain the larger anti-replay window size.

Using Easy-VPN Client

Note This section applies to VPN modules running Cisco IOS Release 12.2(14)SY or later releases.

Caution You need to clear all other crypto configurations from your running configuration on the

Cisco IOS-based Easy-VPN client that you are using to connect to the VPN module. If an ISAKMP

policy is configured, it takes precedence over the pre-installed Easy-VPN ISAKMP policies and the

connection will fail. Other clients such as the VPN3000 and PIX systems running Easy-VPN will prevent

you from configuring Easy-VPN unless all crypto configurations are removed.

For complete configuration information for Easy-VPN client support, refer to this URL:

http://www.cisco.com/en/US/products/sw/secursw/ps2308/products_user_guide_chapter09186a00800e

7251.html#xtocid2

For complete configuration information for Easy-VPN server (router side) support, refer to this URL:

http://www.cisco.com/en/US/products/sw/iosswrel/ps1839/products_feature_guide09186a0080087d1e.html