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Overview

Hardware bypass is supported only on a fixed set of ports. You can pair Port 1 with Port 2, Port 3 with Port

4, but you cannot pair Port 1 with Port 4 for example.

Note

When the appliance switches from normal operation to hardware bypass or from hardware bypass back to

normal operation, traffic may be interrupted for several seconds. A number of factors can affect the length of

the interruption; for example, behavior of the optical link partner such as how it handles link faults and

debounce timing; spanning tree protocol convergence; dynamic routing protocol convergence; and so on.

During this time, you may experience dropped connections.

There are three configuration options for hardware bypass network modules:

• Passive interfaces—Connection to a single port.

For each network segment you want to monitor passively, connect the cables to one interface. This is

how the nonhardware bypass network modules operate.

• Inline interfaces—Connection to any two like ports (10 Gb to 10 Gb for example) on one network module,

across network modules, or fixed ports.

For each network segment you want to monitor inline, connect the cables to pairs of interfaces.

• Inline with hardware bypass interfaces—Connection of a hardware bypass paired set.

For each network segment that you want to configure inline with fail-open, connect the cables to the

paired interface set.

For the 40-Gb network module, you connect the two ports to form a paired set. For the 1/10-Gb network

modules, you connect the top port to the bottom port to form a hardware bypass paired set. This allows

traffic to flow even if the security appliance fails or loses power.

Note

If you have an inline interface set with a mix of hardware bypass and nonhardware bypass interfaces, you

cannot enable hardware bypass on this inline interface set. You can only enable hardware bypass on an inline

interface set if all the pairs in the inline set are valid hardware bypass pairs.

For More Information

• See

1-Gb Network Module with Hardware Bypass , on page 18

module.

• See

40-Gb Network Module with Hardware Bypass , on page 19

network module.

• See

1-Gb SX/10-Gb SR/10-Gb LR Network Module with Hardware Bypass , on page 20

description of the 1-Gb SX, 10-Gb SR and LR network modules.

• See

Install, Remove, and Replace the Network Module

single-wide network modules.

Hardware Bypass Network Modules

for a description of the 1-Gb network

for a description of the 40-Gb

for the procedure for removing and replacing

Overview

for a