Grass Valley DHP v.1.1 - Manual (Page 17)

9
DHP
Reference Manual
Tieline A connection between the output of one router and the input of
another router (or possibly of the same router). A multi-hop tieline
is one that involves connections among more than two routers.
Configuration
As a service, DHP interprets take commands from the NV9000 and calculates routes that require
disembedded and re-embedded audio, and relays appropriate commands to the router. DHP
manages a pool of DHP ports that we call the DHP core. DHP also determines whether the route
requires use of the DHP core. A case where it does not require the core is a take from a standard
input to a standard output.
There are several steps in configuring DHP. These involve MRC, NV9000-SE Utilities (and your
NV9000 configuration) and DHP configuration files.
The order in which you perform the configuration steps is not critical as long as you perform all
the configuration tasks and have valid DHP configuration files installed before you restart your
NV9000 with DHP active.
There is no feedback that can tell you whether DHP is active and running properly, except that
DHP will not work if you have, for example, an improper DHP configuration file.
If you are using the NV9000 Web Suite to monitor DHP, and DHP is not operating, the DHP pages
will “freeze” and display stale data. The web suite has no failure report.
Warnings
If you are adding DHP to an existing router, save your existing configuration before doing so. If
you ever decide to stop using DHP, your router will need a non-DHP configuration to operate.
Do not restart your NV9000 without correct DHP configuration files. DHP might fail to start if it
detects errors in its configuration files.
Assumptions made here: your NV9000 is configured and is communicating with the router that
is to use DHP. This document does not address NV9000 configuration apart from the require-
ments for DHP.
Summary
This is a summary of the DHP configuration steps. Details follow.
1 Following your DHP analysis, populate the router with cards belonging to the DHP core.
Make notes about what you have done.
2 In MRC, define or redefine router partitions for the router.
3 In MRC, specify or re-specify the card types for all slots of the router.
4 In MRC, ensure that no router input has its “force embedder on” attribute set true.
5 In NV9000-SE Utilities
a Make the NV9000 communicate with DHP (instead of the router)
b Make DHP communicate with the router’s control card(s).
6 In NotePad or a similar tool, write the DHP configuration files. Verify that they are correct and
save them in the folder C:\nvision of the NV9000 system controller(s).