MGP is configured automatically by Ericsson control software, but can be set up via
the GUI (or the Front Panel). Please note that some of the settings mentioned here
are hidden if the unit is or has been under the control of Ericsson control software.
MGP can operate in one of two modes, or it may be turned off:
• In Unit Level mode, it is assumed that another unit is, or may be configured
with, the same output transport streams. When a failure occurs, MGP will
coordinate a redundancy switch of all the services from one unit to the other.
• In Media Level mode, transport streams may be grouped together into media
bundles, which may be individually switched between units.
In addition, MGP operation is significantly affected by two other settings:
• The Network Mode for the output Interfaces, a choice of Same Network or
Different Network, and
• The transport stream source IP redundancy, a choice of Transparent or Non-
transparent.
With a Network Mode set to Same-Network, interfaces 3 and 4 share the same IP
address and are therefore on the same network. Further options define how the
interfaces are used. But from the perspective of MGP, there is only one logical
output interface.
With a Network Mode set to Different-Network, interfaces 3 and 4 must be
connected to seemingly different networks (or sub nets) and they each get their own
distinct IP address.
When TS Source IP Redundancy is set to Transparent, media IP packets and
MGP status IP packets are virtually sourced from IP addresses which can remain
the same when a service bundle is switched from one unit to another. This setting is
incompatible with the Different-Network mode.
MGP works by emitting MGP Status Messages (MSMs) alongside the media
packets, but on a separate multicast common to a bundle, if applicable, and shared
with units likely to take over a service in case of failure or simply targeted for a near-
seamless switch.
3.7.22.2 Configuring MGP
Set up the output interface Network mode: Device Configuration > Advanced
Setup > Device > Network Configuration > Data Interface Group 3-4 >
Network Mode.
1. Set up the Transport Stream source IP redundancy mode: Device
Configuration > Advanced Setup > Device > Base Unit > TS Source IP
Redundancy.
Note: A selection of output interface Network mode of Different Network,
together with a transport stream source IP redundancy mode of
Transparent, is not a valid combination.
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