TP-Link TL-ER604W User Manual page 170

Step 10 : Look for Exchange mode, please select IKE, and Security Protocol, we use ESP here.
Step 11 : Authentication Algorithm and Encryption Algorithm are the same with Router A,
we use MD5 and 3DES in this example.
Step 12 : IKE Security Policy, we use test2 in this example.
Step 13 : Look for PFS, we set NONE here, under Lifetime, enter "28800" or the period you
want.
Step 14 : Look for Status then select Enable.
Step 15 : Click on Save.
Step 16 : Enable IPsec and then click on Save.
E. Checking IPsec SA
Router A:
Router B:
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