Connecting a passive TAP: Difference between revisions

From wiki.comcert.com
Jump to navigation Jump to search
No edit summary
No edit summary
 
(31 intermediate revisions by the same user not shown)
Line 2: Line 2:
== Introduction ==
== Introduction ==


Multi-mode and single-mode passive Fiber Optic TAPs require little or no configuration. While cabling the network - and site ports is straight forward, the cabling between the TAP output and the NETSCOUT Accelerator NIC is a bit special.
Passive Fiber Optic TAPs require little or no configuration. While cabling the network - and site ports is straight forward, the cabling between the TAP output and the NETSCOUT Accelerator NIC is somewhat special.


 
 
Line 10: Line 10:
 
 


=== Cables required ===
{{#invoke:Message box|ambox |type=content|text=A single passive TAP could add 3dB of optical loss to the link it is inserted in. Make sure you have a sufficiently lage optical power budget before inserting the TAP.}}


The two fibers of the duplex LC-LC output of the TAP - indicated with "monitor" - are both used for transmission.
 
 
{{#invoke:Message box|ambox |type=content|text=Inspect and clean all optical connectors and bulk heads before making a connection.}}
 
 


To connect to the NETSCOUT Accelerator NIC, you need a LC-LC-duplex to 2x LC-simplex fan-out cable. It is very easy to make a cable like that.
{{#invoke:Message box|ambox |type=content|text=Passive TAPs are direction sensitive! Make sure to respect the fiber poloarity while connecting. when Rx/Tx are reversed on both ports A and B, the tapped link will still become active, however, the bleed-off won't work.}}


 
 


=== Connecting the TAP to the NETSCOUT accelerator NIC ===
=== LC SM/MM HD Fiber TAP ===
 
The label on the tap indicated where the light should arrive (Rx) and where it will be transmitted (Tx). 


Both LC-simplex connectors need to be connected to the input of two separate SFP/SFP+ ports on the NETSCOUT Accelerator NIC on the back of the appliance.
==== TAP internal wiring: ====


 
 
[[File:TAPInternalCabling.png|border|center|400px|TAPInternalCabling.png]]
==== Y-cable ====
The two fibers of the duplex LC-LC output of the TAP - indicated with "monitor 1A and 1B" - are used for transmission.
To connect to the NETSCOUT Accelerator NIC, you need a LC-LC-duplex to 2x LC-simplex Y-cable.  It is very simple to make a cable like this from a standard duplex fiber optic patch cord:


 
 


Inspect and clean all fiber connectors and ports before making a connection.
[[File:LCLCFanOut.jpg|border|center|400px|LCLCFanOut.jpg]]


 
 
==== Connecting the TAP to the NETSCOUT Accelerator NIC ====
Both LC-simplex connectors of the Y-cable must be connected to the input (Rx) of two  ports on the NETSCOUT Accelerator NIC on the rear of the appliance.  The ports are numberd from top to bottom.  Some appliances (like the PMA-2XX) have the card rotated 90° clockwise.  In that case nubers start from right to left.  If not fully used, connect the lowest port numbers first.
The following picture is showing the TAP - situated on top of the appliance - while the output is connected with a Y-cable to the first and second interface (equiped with 10GBASE-SX SFP+) of the NETSCOUT Accelerator NIC.  The TAP is not yet brought in line.


 
 
[[File:TAPConnectNIC.jpg|border|center|400px|TAPConnectNIC.jpg]]


 
 
=== Port aggregation ===
An aggregate must be created from the two connected ports. Ask your COMCERT Engineer to configure a Port Aggregate or read the Agent Configuration Utility for CDM/ASI Administration Guide carefully for details on how to create a Port Aggregate.

Latest revision as of 16:44, 23 December 2022

Introduction

Passive Fiber Optic TAPs require little or no configuration. While cabling the network - and site ports is straight forward, the cabling between the TAP output and the NETSCOUT Accelerator NIC is somewhat special.

 

Solution

 

 

 

 

LC SM/MM HD Fiber TAP

The label on the tap indicated where the light should arrive (Rx) and where it will be transmitted (Tx). 

TAP internal wiring:

 

TAPInternalCabling.png
TAPInternalCabling.png

Y-cable

The two fibers of the duplex LC-LC output of the TAP - indicated with "monitor 1A and 1B" - are used for transmission.

To connect to the NETSCOUT Accelerator NIC, you need a LC-LC-duplex to 2x LC-simplex Y-cable.  It is very simple to make a cable like this from a standard duplex fiber optic patch cord:

 

LCLCFanOut.jpg
LCLCFanOut.jpg

 

Connecting the TAP to the NETSCOUT Accelerator NIC

Both LC-simplex connectors of the Y-cable must be connected to the input (Rx) of two  ports on the NETSCOUT Accelerator NIC on the rear of the appliance.  The ports are numberd from top to bottom.  Some appliances (like the PMA-2XX) have the card rotated 90° clockwise.  In that case nubers start from right to left.  If not fully used, connect the lowest port numbers first.

The following picture is showing the TAP - situated on top of the appliance - while the output is connected with a Y-cable to the first and second interface (equiped with 10GBASE-SX SFP+) of the NETSCOUT Accelerator NIC.  The TAP is not yet brought in line.

 

TAPConnectNIC.jpg
TAPConnectNIC.jpg

 

Port aggregation

An aggregate must be created from the two connected ports. Ask your COMCERT Engineer to configure a Port Aggregate or read the Agent Configuration Utility for CDM/ASI Administration Guide carefully for details on how to create a Port Aggregate.