FIM-7941F interface module
The FIM-7941F interface module is a hot swappable module that provides data, management, and session sync/heartbeat interfaces, base backplane switching, hardware acceleration, and fabric backplane session-aware load balancing for a FortiGate 7000F series chassis. The FIM-7941F includes an integrated switch fabric, five NP7 processors to load balance millions of data sessions over the FortiGate 7000F 400Gbps fabric backplane channel to FPM processor modules. The FIM-7941F also includes a 50Gbps base backplane channel for base backplane management communication with each FPM in the chassis, one 1Tbps fabric backplane channel for fabric backplane communication with the other FIM in the chassis, and a second 50Gbps base backplane channel for base backplane communication with the other FIM in the chassis. The FIM-7941F also includes two 4TByte SSD log disks in a RAID-1 configuration. The SSDs are accessible from the FIM-7941F front panel but should not be removed.
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The FIM-7941F interface module is an update of the FIM-7921F interface module with the same architecture but a newer switch fabric that has a greater capacity and supports more advanced features. You cannot include a FIM-7941F and FIM-7921F in the same chassis. In an HA configuration, both chassis in the HA cluster must have the same FIMs. |
The FIM-7941F can be installed in any FortiGate 7000F series chassis in chassis hub/switch slots 1 or 2. The FIM-7941F includes eighteen front panel 100GigE QSFP28 fabric channel data network interfaces (1 to 18) and two 400GigE QSFP-DD fabric channel data network interfaces (19 and 20). Interfaces 1 to 18 can be connected to 100Gbps data networks. Interfaces 19 and 20 can be connected to 400Gbps data networks. You can also change the interface type of interfaces 19 and 20 and change the speeds of all of the data interfaces. You can split interfaces 1 to 20, M1, and M2.
The FIM-7941F also includes two 100 GigE QSFP28 base channel management interfaces (M1 and M2) and two 25 GigE SPF28 base channel management interfaces (M3 and M4). The management interfaces can be used for HA heartbeat communication and session synchronization between two chassis in HA mode or for other management functions such as remote logging. You can also change the speeds of the management interfaces. You can also split the M1 and M2 interfaces.
The FIM-7941F includes a console port to provide console access to the FIM-7941F CLI.
FIM-7941F front panel
Front panel interfaces
The front panel also includes M1 and M2 QSFP28, M3 and M4 SFP28 interfaces that connect to the base channel, two Ethernet management interfaces (MGMT1 and MGMT2), and a USB port. The USB port can be used with any USB key for backing up and restoring configuration files and installing and restoring firmware.
| Connector | Type | Speed | Protocol | Description |
|---|---|---|---|---|
| 1 to 18 | QSFP28 |
100Gbps 40Gbps 4 x 25Gbps (split) 4 x 10Gbps (split) |
Ethernet |
Eighteen front panel 100GigE QSFP28 fabric channel data interfaces that can be connected to 100Gbps data networks to distribute sessions to the FPMs in chassis slots 3 and up. The speed of these interfaces can be changed to 40Gbps. These interfaces can be split into four interfaces. Each split interface can operate at 25Gbps or 10Gbps. |
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19 and 20 |
QSFP-DD |
400Gbps 100Gbps 40Gbps 4 x 100Gbps (split) 4 x 25Gbps (split) 4 x 10Gbps (split) 8 x 25Gbps (split) 8 x 10Gbps (split) |
Ethernet |
Two front panel 400GigE QSFP-DD fabric channel data interfaces that can be connected to 400Gbps data networks to distribute sessions to the FPMs in chassis slots 3 and up. These interfaces can be changed to 100GigE QSFP28 interfaces and the speed changed to 40Gbps. These interfaces can be split into four interfaces that can operate at 100Gbps, 25Gbps, or 10Gbps. These interfaces can also be split into eight interfaces that can operate at 25Gbps or 10Gbps. |
| M1 and M2 | QSFP28 |
100Gbps 40Gbps 4 x 25Gbps (split) 4 x 10Gbps (split) |
Ethernet |
Two front panel 100GigE QSFP28 base channel management interfaces. These interfaces are used for HA heartbeat, and session synchronization between FIM-7941Fs in different chassis. These interfaces can also be used for management communication (for example, for remote logging). The speed of these interfaces can be changed to 40Gbps. These interfaces can be split into four interfaces. Each split interface can operate at 25Gbps or 10Gbps. |
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M3 and M4 |
SFP28 |
25Gbps 10Gbps |
Ethernet |
Two front panel 25GigE SFP28 base channel management interfaces. These interfaces are used for HA heartbeat, and session synchronization between FIM-7941Fs in different chassis. These interfaces can also be used for management communication (for example, for remote logging). The speed of these interfaces can be changed to 10Gbps. |
| MGMT1 and MGMT2 | RJ-45 |
10Mbps 100Mbps 1000Mbps |
Ethernet | Two 10/100/1000BASE-T copper out of band management ethernet interfaces. |
| USB | USB 3.0 Type A | USB 3.0 USB 2.0 | Standard USB connector. | |
| Console | RJ-45 | 9600 bps 8/N/1 |
RS-232 serial | Serial connection to the FIM-7941F CLI. |
Changing the FIM-7941F 1 to 18, M1, and M2 interfaces
By default, the FIM-7941F 1 to 18 (P1 to P18) , M1, and M2 interfaces are configured as 100GigE QSFP28 interfaces. You can make the following changes to these interfaces:
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Change the interface speed to 100G or 40G using the
config system interfacecommand. -
Split one or more of the interfaces into four 25GigE interfaces.
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Change the interface speed of one or more of the split interfaces to 10Gig.
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You should configure split interfaces on both FortiGate 7000Fs before forming an FGCP HA cluster. If you decide to change the split interface configuration after forming a cluster, you need to remove the secondary FortiGate 7000F from the cluster and change the split interface configuration on both FortiGate 7000Fs separately. After the FortiGate 7000Fs restart, you can re-form the cluster. This process will cause traffic interruptions. |
You can use the following command to split the P3 interface of the FIM-7941F in slot 1 and the P16 and M1 interfaces of the FIM-7941F in slot 2:
config system global
set split-port 1-P3 2-P16 2-M1
end
The FortiGate 7000F reboots and when it starts up:
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Interface 1-P3 has been replaced by four 25GigE CR2 interfaces named 1-P3/1 to 1-P3/4.
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Interface 2-P16 has been replaced by four 25GigE CR2 interfaces named 2-P16/1 to 2-P16/4.
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Interface 2-M1 has been replaced by four 25GigE CR2 interfaces named 2-M1/1 to 2-M1/4.
You can use the config system interface command to change the speeds of each of the split interfaces. You can change the speed of some or all of the individual split interfaces depending on whether the transceiver installed in the interface slot supports different speeds for the split interfaces.
For example, to change the speed of the 2-P16/3 interface to 10Gig:
config system interface
edit 2-P16/3
set speed 10000full
end
Changing the FIM-7941F 19 and 20 interfaces
By default, the FIM-7941F 19 and 20 (P19 and P20) interfaces are configured as 400GigE QSFP-DD interfaces. You can make the following changes to one or both of these interfaces:
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Change the interface speed to 400G, 100G, or 40G using the
config system interfacecommand. -
Split the interface into four 100GigE CR2 interfaces.
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Split the interface into four 25GigE CR or 10GigE SR interfaces.
All of these operations, except changing the interface speed using the config system interface command, require a system restart. Fortinet recommends that you perform these operations during a maintenance window and plan the changes to avoid traffic disruption.
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You should change interface types or split interfaces on both FortiGate 7000Fs before forming an FGCP HA cluster. If you decide to change interface type or split interfaces after forming a cluster, you need to remove the secondary FortiGate 7000F from the cluster and change interfaces as required on both FortiGate 7000Fs separately. After the FortiGate 7000Fs restart, you can re-form the cluster. This process will cause traffic interruptions. |
Splitting the P19 or P20 interfaces into four 100GigE CR2 interfaces
You can use the following command to split the P19 or P20 interfaces into four 100GigE CR2 interfaces. To split P19 of the FIM-7941F in slot 1 (1-P19) and P20 of the FIM-7941F in slot 2 (2-P20) enter the following command:
config system global
set split-port 1-P19 2-P20
end
The FortiGate 7000F reboots and when it starts up:
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Interface 1-P19 has been replaced by four 100GigE CR2 interfaces named 1-P19/1 to 1-P19/4.
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Interface 2-P20 has been replaced by four 100GigE CR2 interfaces named 2-P20/1 to 2-P20/4.
Splitting the P19 or P20 interfaces into four 25GigE CR or 10GigE SR interfaces
You can use the following command to split the P19 or P20 interfaces into four 25GigE CR interfaces. The following command converts the interface into a 100GigE QSFP28 interface then splits this interface into four 25 GigE CR interfaces. To split P19 of the FIM-7941F in slot 1 (1-P19) and P20 of the FIM-7941F in slot 2 (2-P20) enter the following command:
config system global
set qsfpdd-100g-port 1-P19 2-P20
set split-port 1-P19 2-P20
end
The FortiGate 7000F reboots and when it starts up:
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Interface 1-P19 has been replaced by four 25GigE CR interfaces named 1-P19/1 to 1-P19/4.
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Interface 2-P20 has been replaced by four 25GigE CR interfaces named 2-P20/1 to 2-P20/4.
If you want some or all of these interfaces to operate as 10GigE SR interfaces you can use the config system interface command to change the interface speed. You can change the speed of some or all of the individual split interfaces depending on whether the transceiver installed in the interface slot supports different speeds for the split interfaces.
Splitting the FIM-7941F P19 and P20 interfaces into eight 25GigE CR or 10GigE SR interfaces
You can use the following command to split the P19 or P20 interface of the FIM-7941F into eight 25GigE CR interfaces. To split P20 of the FIM-7941F in slot 1 (1-P20) and P19 of the FIM-7941F in slot 2 (2-P19) enter the following command:
config system global
set split-port 1-P20 2-P19
set qsfpdd-split8-port 1-P20 2-P19
end
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You must set both |
The FortiGate 7000F reboots and when it starts up:
The 1-P20 interface is converted into eight 25GigE CR interfaces named 1-P20/1 to 1-P20/8.
The 2-P19 interface is converted into eight 25GigE CR interfaces named 2-P19/1 to 2-P19/8.
If you want some or all of these interfaces to operate as 10GigE SR interfaces you can use the config system interface command to change the interface speed. You can change the speed of some or all of the individual split interfaces depending on whether the transceiver installed in the interface slot supports different speeds for the split interfaces.
FIM-7941F hardware architecture
The FIM-7941F includes an integrated switch fabric (ISF) that connects the front panel interfaces and the chassis fabric backplane to the NP7 processors. The NP7 processors receive sessions from the FIM front panel data interfaces and the FPM front panel data interfaces over the fabric backplane. The NP7 processors use SLBC to distribute sessions to FPMs over the fabric backplane.
The FIM-7941F also includes the following backplane communication channels:
- Ten 400Gbps fabric backplane channel to distribute traffic to the FPMs.
- Ten 50Gbps base backplane channel for base backplane communication with the FPMs.
- One 1Tbps fabric backplane channel for fabric backplane communication with the other FIM.
- One 50Gbps base backplane channel for base backplane communication with the other FIM.
FIM-7941F hardware architecture
