IBM 10G Network Active Bypass User Manual page 26

If heartbeat packets are blocked, the 10G Network Active Bypass unit routes traffic from port N1
(network in) to the appliance port A1 (appliance in) and from port N2 (network out) to appliance port A2
(appliance out). This mode ensures that the heartbeat packet is flowing through the appliance, but
network traffic is not flowing through the appliance.
In this mode, the 10G Network Active Bypass unit tries to negotiate at the link speed and duplex mode
configured in its policy. If the policy is set to auto-negotiate, the Network IPS appliance tries to use
auto-negotiation to communicate to the devices connected to it.
Manual Active Bypass
The 10G Network Active Bypass unit is always in bypass mode regardless of the heartbeat state. Network
traffic flows between the network ports, but the 10G Network Active Bypass unit does not send heartbeat
packets.
In this mode, the 10G Network Active Bypass unit tries to negotiate at the link speed and duplex
configured in its policy. If the policy is set to auto-negotiate, the Network IPS appliance tries to use
auto-negotiation to communicate to the devices connected to it.
Manual Active Inline
The 10G Network Active Bypass unit is always in inline mode regardless of the heartbeat state. Network
traffic flows from port N1 to port A1 and from port N2 to port A2, but the 10G Network Active Bypass
unit does not send heartbeat packets.
In this mode, the 10G Network Active Bypass unit tries to negotiate at the link speed and duplex mode
configured in its policy. If the policy is set to auto-negotiate, the Network IPS appliance tries to use
auto-negotiation to communicate to the devices connected to it.
8
10G Network Active Bypass V3.4: User Guide