Ericsson SPR1100 Operations Instructions Page 65

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Getting Started
Figure 3.12 1 + 1 Redundancy Configuration
7. Open the Web GUI for the Primary unit and click Configure > System >
Standalone 1 + 1 Redundancy. Enter the control IP address of the Secondary
in the Peer IP Address setting, select Primary as the Unit Role and click Apply
Changes, then OK on the popup dialog.
8. On the Primary unit Web GUI click Set Primary Active, then OK on the popup
dialog.
9. On the Primary unit Web GUI click Manual Configuration Copy From Primary
to Secondary, then OK on the popup dialog.
10. On the Primary unit Web GUI click Configure > System > MGP Support. Set
MGP Mode to On, click Apply Changes, then OK on the popup dialog.
11. Wait for 60 seconds for the units to stabilize.
12. As a final check, click on the Configure on the Secondary Web GUI. The
services configuration will be displayed. Compare this with the services
configuration of the primary and make sure they are the same.
13. Connect the data networks to the Secondary unit.
3.12.1 Recommendations for 1 + 1 Redundancy
Enable MGP
It is possible for the 1 + 1 Redundancy system to have both units Active. This can
happen if the control connection between the units fails. In this case the Secondary
thinks the Primary has failed, and becomes Active. This could cause duplicate
multicast packets on the output data network. To prevent this it is recommended that
Multicast Guard Protocol (MGP) is always enabled in a 1 + 1 Redundancy system.
To enable MGP, open the Web GUI and click Configure > System > MGP
Support. Set MGP Mode to On, click Apply Changes, then OK on the popup
dialog.
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