Appendix c: bypass specifications – NEXCOM NSA 5130 User Manual
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Copyright © 2011 NEXCOM International Co., Ltd. All Rights Reserved.
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NSA 5130 User Manual
Appendix C: Bypass Specifications
NSA 5130 provides LAN bypass functionality to ensure that data can still
pass through the device, even when it is powered off. This feature helps
ensure the continuous flow of data through the device in the event of a
hardware failure. For network security appliances deployed at the gate-
way, for example, it is crucial that they provide LAN bypass functionality to
ensure that hardware failure on these appliances will not bring down the
entire network.
Appendix C: Bypass Specifications
BTCR - Bypass Timer Configuration Register = 0XF2
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
R
X
X
X
X
R/W
Timer
expired
Not
used
Not
used
Not
used
Not
used
Global timeout value
Power ON State Bypass Control Status Register = 0XF3
Bypass Control Register Map
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
W
X
X
X
X
W
W
Bypass mode
Not
used
Not
used
Seg-
ment 4
Seg-
ment 3
Seg-
ment 2
Seg-
ment 1
Power OFF State Bypass Control Status Register = 0XF7
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
X
X
X
X
X
X
W
W
Not
used
Not
used
Not
used
Not
used
Seg-
ment 4
Seg-
ment 3
Seg-
ment 2
Seg-
ment 1