Configuring persistent connections on the USG9000 series

The USG9000 series supports configuring persistent connections through the CLI. The specific configuration method is as follows:
1. In the user view, run the system-view command to enter the system view.
2. Run the firewall long-link aging-time interval command to set the aging time of an IPv4 persistent connection.
Or run the firewall ipv6 long-link aging-time interval command to set the aging time of an IPv6 persistent connection.
The default aging time of a persistent connection is 168 hours.
3. Configure a persistent connection.
-Configure an interzone persistent connection.
a. Run the firewall interzone [ vpn-instance vpn-instance-name ] zone-name1 zone-name2 command to access the interzone view.
b. Run the firewall long-link acl4-number { inbound | outbound } command to enable the interzone IPv4 persistent connection function.
Or run the firewall ipv6 long-link acl6-number { inbound | outbound } command to enable the interzone IPv6 persistent connection function.
-Configure an intrazone persistent connection.
a. Run the firewall zone [ vpn-instance vpn-instance-name ] [ name ] zone-name command to access the security zone view.
b. Run the firewall long-link acl4-number command to enable the intrazone IPv4 persistent connection function.
Or run the firewall ipv6 long-link acl6-number command to enable the intrazone IPv6 persistent connection function.

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