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TMS zl Management and Configuration Guide ST.1.1.100430

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Virtual Private Networks
Configure a GRE over IPsec VPN with IKE
Figure 7-224. Add IPsec Policy Window—Step 4 of 4
18. If desired, configure settings in the Advanced Settings (Optional) section.
a. Select the check boxes for the advanced features that you want to
enable:
– Enable IP compression
– Enable extended sequence number
– Enable re-key on sequence number overflow
This setting is enabled by default.
– Enable persistent tunnel
– Enable fragment before IPsec
This setting is enabled by default.
For information and guidelines on these settings, see “Advanced
IPsec Features” on page 7-22.