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The LAN-to-LAN tunnels do not work after an upgrade to PIX Firewall version 7.0
In PIX Firewall version 6.3, there is no option for tunnel groups. In PIX version 7.x, while the VPN tunnel is configured using the Adaptive Security Device Manager (ASDM), PIX automatically creates a tunnel group,just as in VPN concentrators.
The PIX automatically creates a tunnel group for all LAN-to-LAN tunnels during the code upgrade. However, the PIX sometimes fails to create tunnel groups for all tunnels. This can happen if there is a misconfiguration or there are incomplete crypto maps.
In PIX version 7.x, the tunnel does not come up if tunnel group information is missing in the configuration.