Brocade Mobility 7131 Access Point Product Reference Guide (Supporting software release 4.4.0.0 and later) - Manual (Page 515)

Brocade Mobility 7131 Access Point Product Reference Guide 503
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11. For the ESP Type, select ESP with Authentication and use AES 128-bit as the ESP encryption
algorithm and MD5 as the authentication algorithm. Click OK.
12. Select the IKE Settings button.