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Table of Contents

FortiGate-6000 Handbook

FortiGate-6000 IPsec VPN

The FortiGate-6000 uses SLBC load balancing to select an FPC to terminate traffic for a new IPsec VPN tunnel instance and all traffic for that tunnel instance is terminated on the same FPC.

config vpn ipsec phase1-interface

edit <name>

set ipsec-tunnel-slot {auto | FPC1 | FPC2 | FPC3 | FPC4 | FPC5 | FPC6 | FPC7 | FPC8 | FPC9 | FPC10 | master}

end

You can optionally use the IPsec tunnel phase 1 configuration to select a specific FPC to terminate all tunnel instances started by that phase 1. For example, to terminate all tunnels on FPC5:

config vpn ipsec phase1-interface

edit <name>

set ipsec-tunnel-slot FPC5

end

FortiGate-6000 IPsec VPN supports the following features:

  • Interface-based IPsec VPN (also called route-based IPsec VPN).

  • Site-to-Site IPsec VPN.

  • Dialup IPsec VPN. The FortiGate-6000 can be the dialup server or client.

  • Static and dynamic routing (BGP, OSPF, and RIP) over IPsec VPN tunnels.

  • When an IPsec VPN tunnel is initialized, the SA is synchronized to all FPCs in the FortiGate-6000, or in both FortiGate-6000s in an HA configuration.

  • Traffic between IPsec VPN tunnels is supported when both tunnels terminate on the same FPC.

  • When setting up a VRF configuration to send traffic between two IPsec VPN interfaces with different VRFs, both IPsec tunnels must terminate on the same FPC.

FortiGate-6000 IPsec VPN has the following limitations:

  • Policy-based IPsec VPN tunnels terminated by the FortiGate-6000 are not supported.

  • Policy routes cannot be used for communication over IPsec VPN tunnels.

  • IPv6 clear-text traffic (IPv6 over IPv4 or IPv6 over IPv6) is not supported.

  • IPsec SA synchronization between FGSP HA peers is not supported.

  • When setting up an IPsec VPN VLAN interface, do not set the VLAN ID to 1. This VLAN ID is reserved by FortiOS. Any configurations that use a VLAN with VLAN ID = 1 will not work as expected.

  • The FortiGate-6000, because it uses DP processors for SLBC, does not support IPsec VPN to remote networks with 0- to 15-bit netmasks.

FortiGate-6000 IPsec VPN

The FortiGate-6000 uses SLBC load balancing to select an FPC to terminate traffic for a new IPsec VPN tunnel instance and all traffic for that tunnel instance is terminated on the same FPC.

config vpn ipsec phase1-interface

edit <name>

set ipsec-tunnel-slot {auto | FPC1 | FPC2 | FPC3 | FPC4 | FPC5 | FPC6 | FPC7 | FPC8 | FPC9 | FPC10 | master}

end

You can optionally use the IPsec tunnel phase 1 configuration to select a specific FPC to terminate all tunnel instances started by that phase 1. For example, to terminate all tunnels on FPC5:

config vpn ipsec phase1-interface

edit <name>

set ipsec-tunnel-slot FPC5

end

FortiGate-6000 IPsec VPN supports the following features:

  • Interface-based IPsec VPN (also called route-based IPsec VPN).

  • Site-to-Site IPsec VPN.

  • Dialup IPsec VPN. The FortiGate-6000 can be the dialup server or client.

  • Static and dynamic routing (BGP, OSPF, and RIP) over IPsec VPN tunnels.

  • When an IPsec VPN tunnel is initialized, the SA is synchronized to all FPCs in the FortiGate-6000, or in both FortiGate-6000s in an HA configuration.

  • Traffic between IPsec VPN tunnels is supported when both tunnels terminate on the same FPC.

  • When setting up a VRF configuration to send traffic between two IPsec VPN interfaces with different VRFs, both IPsec tunnels must terminate on the same FPC.

FortiGate-6000 IPsec VPN has the following limitations:

  • Policy-based IPsec VPN tunnels terminated by the FortiGate-6000 are not supported.

  • Policy routes cannot be used for communication over IPsec VPN tunnels.

  • IPv6 clear-text traffic (IPv6 over IPv4 or IPv6 over IPv6) is not supported.

  • IPsec SA synchronization between FGSP HA peers is not supported.

  • When setting up an IPsec VPN VLAN interface, do not set the VLAN ID to 1. This VLAN ID is reserved by FortiOS. Any configurations that use a VLAN with VLAN ID = 1 will not work as expected.

  • The FortiGate-6000, because it uses DP processors for SLBC, does not support IPsec VPN to remote networks with 0- to 15-bit netmasks.