Net Optics iBypass HD - Manual (Page 8)

4
iBypass HD
IPS
Bypass On
Traffic bypasses the IPS
Figure 3: Bypass On mode – the IPS is off-line
Note: _________________________________________________________________________________________________
If fail_state is set to no_traffic rather than fail-to-wire, then network traffic is blocked in Bypass On mode.
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A bypass switch enters Bypass On mode when one of four events occurs:
• Power loss to the iBypass HD
• Link failure
• IPS application failure (can be caused by loss of power to the IPS)
• Bypass On mode forced by CLI command
Link failure and application failure are detected by the Heartbeat packet not being received when expected.
A bypass switch returns to Bypass Off mode when four conditions are met:
• The iBypass HD has power
• The network link is up
• The IPS application is running (passing Heartbeat packets)
• Bypass On mode is not forced by CLI command
These conditions are discussed in further detail in the following sections.
Power Loss Bypass
The bypass switch protects link integrity when the attached IPS or the bypass switch itself loses power. To install the
bypass switch for this type of protection, the switch should share the same power source as the monitoring appliance.
If you are using redundant power supplies for the IPS, connect the same power source to the iBypass HD device's
redundant power inputs.