User's Guide
Table Of Contents
- PTP 250 User Guide
- Safety and regulatory information
- Contents
- List of Figures
- List of Tables
- About This User Guide
- Chapter 1: Product description
- Chapter 2: Planning considerations
- Chapter 3: Legal information
- Chapter 4: Reference information
- Chapter 5: Installation
- Chapter 6: Configuration and alignment
- Chapter 7: Operation
- Chapter 8: Troubleshooting
- Testing link end hardware
- Testing when PoE LEDs do not illuminate correctly
- Testing after a lightning strike
- Test flowcharts
- AC LED is off
- AC LED is flashing
- PORT LED is off
- PORT LED is flashing
- Test Ethernet packet errors reported by ODU
- Test Ethernet packet errors reported by managed switch or router
- Test ping packet loss
- Test resistance in the ODU cable
- Testing the radio link
- Testing link end hardware
- Glossary
PTP 250 User Guide Data network planning
phn-2182_003v004 (Oct 2011)
UNDER DEVELOPMENT
2-23
Data network planning
This section describes factors to be considered when planning PTP 250 data networks.
IP interface
Choose an IP address for the IP interface of the ODU management agent. The IP address
must be unique and valid for the connected network segment.
Ensure that the design of the data network permits bi-directional routing of IP datagrams
between network management systems and the ODUs. For example, ensure that the
gateway IP address identifies a router or other gateway that provides access to the rest of
the data network.
Back to back links
Do not use direct cabled connections between the data ports of two PoE power supplies.
Where two or more links are deployed in a chain, always use an Ethernet switch or router
to interconnect the links at a relay point.
‘Green Ethernet’ switches
Do not connect PTP 250 units to Ethernet networking products that control the level of the
transmitted Ethernet signal based on the measured length of the Ethernet link, for
example Green Ethernet products manufactured by D-Link Corporation. The Ethernet
interfaces in these networking products do not work correctly when connected directly to
the PoE power supply.