Configuring extended sequence number

You can use extended sequence number (ESN) to increase the data transfer rate for a VPN connection.

ESN allows you to transmit large volumes of data at a high speed with out re-keying. The VPN connection uses a 64-bit sequence numbers instead of 32-bit numbers over IPSec. Using 64-bit sequence numbers allows more time before re-keying, which prevents sequence number exhaustion and minimizes the use of system resources.

To enable ESN on a VPN connection follow these steps:

  1. In IBM Navigator for i, expand Network > All Tasks > IP Policies > Virtual Private Networking.
  2. Click Properties.
  3. On the General tab select Use Extended Sequence Number (ESN).