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818 West Diamond Avenue - Third Floor, Gaithersburg, MD 20878 Phone: (301) 670-4784 Fax: (301) 670-9187 Email: info@gl.com Website: http://www.gl.com
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PacketExpert PacketBroker (Wire-speed Ethernet Tap) 818 West - - PowerPoint PPT Presentation
PacketExpert PacketBroker (Wire-speed Ethernet Tap) 818 West - - PowerPoint PPT Presentation
PacketExpert PacketBroker (Wire-speed Ethernet Tap) 818 West Diamond Avenue - Third Floor, Gaithersburg, MD 20878 Phone: (301) 670-4784 Fax: (301) 670-9187 Email: info@gl.com 1 1 Website: http://www.gl.com Ethernet Technology 2
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Just bigger Pipes, but same Ethernet packets
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Non-Intrusive Network Monitoring
- Packet Capture and analysis is the core of
Network monitoring
- When monitoring live networks, non intrusive
monitoring is very important so as not to disturb the network being monitored
- Non intrusive monitoring is achieved by sniffing
a live network link connecting two network nodes, and copying the packets without altering them in any way or disturbing the link
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Wirespeed Filtering
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Port Mirroring
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Disadvantages of Port Mirror/SPAN Method
- Depends on switch CPU for processing it - burdening it
- Packets may drop
- No Filters
- Tx and Rx direction are not separated
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Active Network Tap
- Dedicated hardware device - FPGA based processing means full 100% wirespeed capability to
pass through traffic no drops, no delays, and also to make two separate copies - Tx and Rx side
- Hardware filters means wirespeed filtering
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PacketBroker in Network
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Features
- A network tap like application, with additional advanced features like
➢ Active network tap - capable of handling bidirectional 100% wirespeed traffic upto 1 Gb/s ➢ Wirespeed Filtering - powerful and easy to use ➢ Packet Modification to convey useful information like Timestamp inband ➢ Output aggregation - both direction traffic multiplexed on the same output Based on PacketExpert™ hardware platform
- Ports 2 and 3 act as the Active/Pass through ports
- Ports 1 and 4 act as the Output ports
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Hardware Interfaces
Interfaces
➢ 2 x 10/100/1000 Base-T Electrical only ➢ 2 x 1000 Base-X Optical OR 10/100/1000
Base-T Electrical
➢ Single Mode or Multi Mode Fiber SFP
support with LC connector
➢ Optional 4-Port SMA Jack Trigger Board
(TTL Input/Output) Bus Interface:
➢ USB 2.0
- Protocols:
➢ RFC 2544 compliance ➢ ITU-T Y.1564 (ExpertSAM)
Power:
➢ +9 volts, 2.2 Amps
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Optical Connectors and SFP Transceivers
PacketExpert™ supports LC connectors and 850/1310 nm SFP (Small Factor Pluggable) modules Note: In case customer have different type of connectors, then we need converters like LC-to-SC,
LC-to-FC and vice-versa.
850/1310 nm SFP Module LC Connectors
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Packet Tap, Filter, Aggregation, Modification, & Output
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Capture Traffic of Interest
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Filter Combination
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Filter Example
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Filter Example...
SIP and RTP between 192.168.10.50 192.168.300.25 unidirectional (192.168.10.50 --> 192.168.300.25)
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Filter Configuration Menu
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Filter Configuration Options
Offset (0-2047) 40 Bytes Raw Data /Mask Bytes Raw Edit Field Edit
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Dynamically Enable/Disable Filters
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Dynamically Enable/Disable Filters
Dynamically Enable/Disable Filters, even at run-time
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Discrete Packet Capture
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Trigger Mode
PacketBroker helps achieve this using the Trigger mode for filters. In this user can start the filter in Trigger mode, where it starts to look for packet matching the user defined value As soon as the first packet matches the filter, the filter is set to be triggered, and stops further capture
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Trigger Mode
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Packet Aggregation…
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Packet Aggregation User Interface
The filtered traffic is combined and sent out through a single output port If the combined bandwidth exceeds the wirespeed of the output port, may cause packet loss. Hence, the onboard memory (2 GB DR2 RAM) is used as a temporary buffer to store the traffic
before sent out at wirespeed. Thus, upto 2 GB of traffic can be buffered.
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Packet Modification
Need to convey very useful information such as the timestamp, port number, filter number etc. to the analysis
tool
May not have the flexibility to convey it outband – may need to do it inband PacketBroker provides this functionality by conveying it in the MAC header of the output packets
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Packet Modification…
- Timestamp, Filter Number, Board Serial Number and Port Number fields are written on top of
the Src MAC address and Dst MAC Address fields
- Ethernet CRC is recalculated
- Original MAC header will be lost, but many times, this may be fine if interest is only in higher
layers (IP, TCP/UDP etc)
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Packet Modifier Enable/Disable
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PacketModifer Field Config Menu
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Packet Modifier Field Configuration
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Packet Modifier Board Serial Number Config UI
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Port Statistics
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Future Enhancements
PacketBroker with Recording
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Command Line Interface (CLI)
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APIs for Test Automation and Remote Access
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MAPS™ CLI Client/Server Architecture
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Working Principle of MAPS™ CLI
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MAPS™ CLI Server…
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TCL Client…
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PacketExpert™ Integration with TestShell using TCL Client
TestShell Integration using CLI—Execution of RFC2544 Tests PacketExpert™ Integration with TestShell
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C# Client…
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PacketExpert™ Integration with LabVIEW using C# Client
PacketExpert™ Integration with LabVIEW
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Executing Python Script
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