IMG 1010 - Configuring SS7 Redundancy - 10.5.0

Overview:

Configure two Physical IMGs in the same Logical IMG group to be a redundant pair for SS7 signaling. All subsequent IMG's added to this Logical IMG Group are automatically considered Remote SS7 Nodes whose CIC's are controlled by the Primary and Secondary nodes.

• If GCEMS loses communication with SS7 server nodes the system will remain up and will pass traffic. Switchovers will -NOT- occur since all redundant information is passed between the Redundant and Standby IMG through RCOMM signaling.

• If communication is lost between the GCEMS server and the SS7 server node -and- communication is lost between the Redundant and Standby SS7 server nodes (Loss of RCOMM signaling) then the following will happen:

  • The SS7 server node will reset itself.* The SS7 server standby/peer node will take over all communications.

  • The SS7 server node will not be able to reconfigure since it cannot communicate with the GCEMS. Therefore redundancy cannot be restored until communication between the SS7 server node and GCEMS server is restored. This reset is accomplished so that there can never be a scenario where both SS7 server nodes get into an Active/Active situation.
     

Pre-requisite to Configuring SS7 Redundancy:

• Create the IMG 1010 - Logical IMG to which the SS7 nodes will be assigned.

• Create the two IMG 1010 - Physical IMG that will be the Primary and Secondary SS7 nodes.

• Add facilities to each IMG.

Configure Redundant SS7 Signaling on the Primary IMG

See IMG 1010 - Configuring SS7 Signaling - 10.5.0 for the general procedure, setting specific fields in panes as noted below.

• SS7 Signaling (See paragraph "Creating an SS7 Signaling Entry" on page IMG 1010 - Configuring SS7 Signaling - 10.5.0)

  • In the Redundancy Configuration field, select Primary.

  • In the Peer Logical Node ID field, select the secondary IMG. If there is only one other IMG in the Logical IMG it will be automatically populated with that Node.

• Primary SS7 Links (See paragraph "Configuring SS7 Signaling Links" on page IMG 1010 - Configuring SS7 Signaling - 10.5.0)

  • In the Primary/Secondary field select Primary.

  • The Link ID field drop-down will include ID's 0-63, and will be populated with the first available number.

  • The Interface - Offset field drop-down will include spans configured on the Primary IMG and default to the first available span.

• Secondary SS7 Links (See paragraph "Configuring SS7 Signaling Links" on page IMG 1010 - Configuring SS7 Signaling - 10.5.0)