Active-Active Geographical Redundancy
Ericsson Service-Aware Policy Controller

Contents

1Active-Active Geographical Redundancy Introduction

2
Active-Active Geographical Redundancy
2.1Procedures and States

3
Active-Active Geographical Redundancy Procedures
3.1Preconditions
3.2Start Geographical Redundancy
3.3Temporarily Disable Geographical Redundancy
3.4Monitor Geographical Redundancy State
3.5Check Geographical Redundancy Configuration
3.6Change Preferred Role in Geographical Redundancy
3.7Maintenance Activities

4
Active-Active Geographical Redundancy Fault Management

Abstract

The purpose of this document is to provide a guideline to manage Active-Active Geographical Redundancy in the SAPC


1   Active-Active Geographical RedundancyIntroduction

This instruction provides a guideline for configuring the SAPC for Active-Active geographical redundancy. This can be managed using NETCONF or the ECLI to manipulate the MIB.

2   Active-Active Geographical Redundancy

2.1   Procedures and States

The following figure shows the different state transitions because of geographical redundancy OAM procedures:

Figure 1   State transitions because of geographical redundancy OAM procedures

The following figure shows the different state transitions taking into account both SAPC peers:

Figure 2   State transitions in both SAPC peers because of geographical redundancy OAM procedures

3   Active-Active Geographical Redundancy Procedures

3.1   Preconditions

The following conditions must be fulfilled before the data presented in this document is configured in an operational network:

3.2   Start Geographical Redundancy

To start geographical redundancy in the two SAPC peers, follow Start Active-Active Geographical Redundancy.

3.3   Temporarily Disable Geographical Redundancy

To temporarily disable geographical redundancy, follow Temporarily Disable Active-Active Geographical Redundancy.

Warning!

Check the state of the other SAPC before ordering a stop operation. If the other SAPC is already in Halted state, nothing prevents ordering a stop operation to the local SAPC.

3.4   Monitor Geographical Redundancy State

This procedure retrieves the geographical redundancy state of the SAPC. During normal operation, it is expected that the SAPC is in Distributed state.

To monitor geographical redundancy state, do the following:

  1. Connect to the SAPC and open an Ericsson Command-Line Interface (CLI) session.
  2. Navigate to class GeoRedManager object:

    >dn ManagedElementId=1,PolicyControlFunction=1,GeoRedManager=1

  3. Execute action show:

    (ManagedElement=1,PolicyControlFunction=1,GeoRedManager=1)>show

  4. Verify the values of currentState and previousState attributes.

3.5   Check Geographical Redundancy Configuration

To check geographical redundancy configuration, do the following:

  1. Connect to the SAPC and open an Ericsson Command-Line Interface (CLI) session.
  2. Navigate to class GeoRedManager object:

    >dn ManagedElementId=1,PolicyControlFunction=1,GeoRedManager=1

  3. Execute action showConfiguration:

    (ManagedElement=1,PolicyControlFunction=1,GeoRedManager=1)>showConfiguration

  4. Verify the values of Local IP, Peer IP, and Role attributes.

3.6   Change Preferred Role in Geographical Redundancy

To change Preferred role in geographical redundancy, follow Change Preferred Role in Active-Active Geographical Redundancy.

3.7   Maintenance Activities

To perform low-level maintenance activities on one of both SAPC other than upgrading the version (such as hardware replacements), it is recommended to disable the geographical redundancy and halt the SAPC to be maintained. If the maintenance task is to be performed in both SAPC, it is preferable to start with the one configured as Non Preferred. To do so follow these steps:

  1. On the desired SAPC temporarily disable geographical redundancy by following Temporarily Disable Active-Active Geographical Redundancy. This procedure stops the DBS replication and changes the state to Halted. The other SAPC passes to Active state.
  2. On the other SAPC (it should be in Active state), execute the following command to disable DBS replication:

    >immcfg -a isEnabled=0 dbsNetsharedConfigId=1

  3. Perform the maintenance task on the Halted SAPC.
  4. On the Active SAPC, enable again the DBS replication by executing:

    >immcfg -a isEnabled=1 dbsNetsharedConfigId=1

  5. On the Halted SAPC, enable again the geographical redundancy following the procedure Enable Active-Active Geographical Redundancy documented at Temporarily Disable Active-Active Geographical Redundancy.
  6. Execute the following command and wait until all payload processors (PLs) show idle state in both SAPC:

    >clurun.sh -c netshared_state_dump

  7. Repeat steps from 1 to 7 on the other SAPC if needed.
  8. If desired, modify preferred roles by following Change Preferred Role in Active-Active Geographical Redundancy.

4   Active-Active Geographical Redundancy Fault Management

The following is the list of alarms related to Geographical Redundancy:

The DBS ones are the following:

Legal | © Ericsson España, S