Basic principles
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Overview
This is the coding guideline of how FTTH + DSL + WiFi is (will be) implemented in NMS Prime.
The problem
TR-69 is a provisioning protocol for CPE's only. This implies there is now standardised way of how to set Modem speed rates (e.g. Downstream/Upstream rate 100MBit/s to 10MBit/s). Many operator address this by using a quick-and-dirty method of setting internet speeds at the OLT directly via CLI. The next logical step is easy but also dirty: using the CRM to somehow "connect via telnet or SSH and push the required speed rates via CLI (or better SNMP)". This will work but it comes at a high price, imagine:
disadvantages for setting the modem speed via CLI
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:
- Every network architecture (GPON, Active Ethernet, DSL, WiFi) requires a different provisioning implementation
- vendor specific CLI commands (or SNMP MIBs) makes life hard for a generic implementation approach
switching OLT vendor will cause pain! - ONU –> OLT port mapping required
support team needs knowledge of FTTH connection circuits (ineffective/bad workflow!) - potential config race conditions / hazards
Assume you are connected via SSH towards your OLT, while the provisionig system pushes also config changes via telnet/SSH. This could lead to race conditions, especially while saving configs.
Naming conventions
| Protocol | Usage | Provisioning of |
|---|---|---|
| TR-69 | protocol for remote management of customer-premises equipment (CPEs) | CPEs only! |
| PPPoE | The |
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| Point-to-Point Protocol over Ethernet (PPPoE) is a network protocol for encapsulating PPP frames inside Ethernet frames. (wikipedia) | speed provisioning of any device (DSL, PGON, AE, ..) | |
| AE | Active Ethernet | |
OLT ONU | Optical Line Terminal Optical Network Unit | |
The solution:
The solution is PPPoE with the following architecture
- OLT / AE / DSLAM serves all ONUs with a default profile of maximum speed, e.g. 1GBit/s down and upstream
- a normal core router with PPPoE is used for traffic shaping
- customer devices requires to use PPPoE protocol for dial-in
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