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Optical characteristics of the TippingPoint 40GbE Fiber Bypass I/O module?

    • Updated:
    • 13 Aug 2019
    • Product/Version:
    • TippingPoint TX-Series All
    • Platform:
Summary
This article provides background information and optical characteristics on TippingPoint I/O 40Gb bypass modules utilized in the Threat Prevention System (TPS) TX-Series (5500TX, 8200TX, 8400TX) family of devices.
Details
Public
Purpose: Bypass I/O Modules (BIOMs) combine the segment interfaces with mechanical bypass switches for high-availability purposes. TippingPoint modules are available with either long-range or short-range transceivers. The BIOMs can route traffic within the module when the device loses power or when the module is removed from the device.
 
40GBASE-SR4 Fiber
Bypass IOM
40GBASE-LR4 Fiber
Bypass IOM
User-added imageUser-added image
 
40Gb Bypass Module Specifications
Feature
TippingPoint IO Module:
1- segment 40GbE SR4
TippingPoint IO Module:
1- segment 40GbE LR4
MFG SKUTPNM0131TPNM0132
Segment CountSingle Segment (2 ports)Single Segment (2 ports)
Customer I/O Connector2x MPO-122x Duplex LC
Optical Fiber TypeMMF 50/125um, OM3, OM4SMF 9/125um, OS1, SMF-28
Center Optical Wavelength850nm
CWDM 1270nm, 1290nm
1310nm, 1330nm
Optical Reach*: TPS ⇔ Link PartnerUp to 50m (OM3) or 75m (OM4)Up to 5km
Embedded Optical Switch Module
MEMS Octo Full 2x2 Series
OM4 MMF, Non-Latching
MEMS Dual Full 2x2 Series
SMF-28, Non-Latching
Embedded 40GbE QSFP+ XCVRsQSFP+ XCVR, 40GBASE-SR4, MMF, MPO
QSFP+ XCVR, 40GBASE-LR4,
SMF, Duplex LC
Est. MAX Optical Loss (Non-Bypass Mode)1.65 dB2.35 dB
Est. MAX Optical Loss (Bypass Mode)1.90 dB2.60 dB
HW Hot-Plug / Hot-Swap SupportYESYES
*TPS Optical Reach is specified at 1/2 distance of 40GBASE-SR4/LR4 MSA optical reach spec, per port, to account for the TPS being in ZPHA Bypass Mode. See diagram in 'Optical Reach Loss Description' section for a graphical description.
 

Optical Reach & Loss Description


The following diagram describes the additional optical loss induced by the HW on the 40GBase- SR4/LR4 IOMs. The MSA and IEEE specify the maximum optical loss from one customer I/O port to another in the form of dB or physical distance. This specification assumes that the "port" is the physical transceiver connection that the customer plugs into directly. But, for the case of a ZPHA capable bypass IOM on TippingPoint TPS products, the customer "port" is not a direct transceiver connection. Instead, there is an internal embedded optical switch between the customer "port" and the QSFP+ transceiver (also embedded inside the module). The following block diagrams describe this additional optical power loss induced by the additional components in the path between the embedded QSFP+ transceiver and the customer I/O port. This additional optical loss may have to be taken into account in the customer's cabling infrastructure.

In addition to the optical loss induced by the additional components in the Bypass IOM, this diagram also describes the difference between a normal port-to-port optical reach as defined by the MSA and IEEE and the optical reach as defined by the TPS products for the case of the ZPHA Bypass Mode. The MSA and IEEE specify the optical reach from transceiver to transceiver. With the TippingPoint TPS product between the two customer's connections, the TPS fully supports the optical reach specified by the MSA and IEEE when the TPS device is in the normal (non-bypass) mode. In this case, the embedded QSFP+ transceivers are alive and transmitting and receiving traffic. But, in the case of ZPHA Bypass mode, the embedded transceivers are off, and the optical switch connects TPS ports A and B directly together. This bypasses the TPS device and presents a direct connection from one device directly to the other device from the customer's point of view. This is a purely passive connection, so it is seen as a direct optical link between the customer's two pieces of equipment. Therefore, to account for the ZPHA Bypass mode, the TPS product specifies an optical reach of 1/2 of that specified by the MSA and IEEE. This guarantees that the bypass link (direct link between the customer's two pieces of equipment) is within the optical reach specified by the MSA and IEEE.

User-added image

 
40GBASE-SR4 Fiber Bypass IOM - Induced Optical Loss
NORMAL MODE
(Embedded QSFP+ to Customer Port)
 BYPASS MODE
(Customer Port-A to Customer Port-B)
COMPONENTESTIMATED MAX OPTICAL LOSSCOMPONENTESTIMATED MAX OPTICAL LOSS
MPO Bulkhead0.25 dBMPO Bulkhead
Port A
0.25 dB
Cable
(MPO to Switch)
0.20 dBCable
(MPO-A to Switch)
0.20 dB
Optical Switch
(Normal Mode)
1.00 dBOptical Switch
(Bypass Mode)
1.00 dB
Cable
(Switch to QSFP+)
0.20 dBCable
(Switch to MPO-B)
0.20 dB
Total Optical Loss1.65 dB MAXMPO Bulkhead
Port B
0.25 dB
 Total Optical Loss1.90 dB MAX
 
40GBASE-LR4 Fiber Bypass IOM - Induced Optical Loss
NORMAL MODE
(Embedded QSFP+ to Customer Port)
 BYPASS MODE
(Customer Port-A to Customer Port-B)
COMPONENTESTIMATED MAX OPTICAL LOSSCOMPONENTESTIMATED MAX OPTICAL LOSS
LC Bulkhead0.25 dBLC Bulkhead - Port A0.25 dB
Cable (LC to Switch)0.30 dBCable
(LC-A to Switch)
0.30 dB
Optical Switch
(Normal Mode)
1.50 dBOptical Switch
(Bypass Mode)
1.50 dB
Cable
(Switch to QSFP+)
0.30 dBCable
(Switch to MPO-B)
0.30 dB
Total Optical Loss2.35 dB MAXCable
(Switch to LC-B)
0.25 dB
 Total Optical Loss2.60 dB MAX

 
Premium
Internal
Rating:
Category:
Configure; Troubleshoot; Deploy
Solution Id:
TP000142909
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