Avaya Media Processing Server Series System (Software Release 2.1) Uživatelský manuál stáhnout pdf (Strana 267)

Configuration Procedures and Considerations

# P0602477 Ver: 3.1.11 Page 267

N+1 Redundancy

N+1 Redundancy is a system backup feature that protects systems from software

and/or hardware failures by automatically switching to a second Application

Processor. In an N+1 configuration, one node serves as a backup or secondary node

for multiple operational or primary nodes. The group of primary components and their

backup component(s) is referred to as a cluster. The figure below shows a basic MPS

1000 N+1 redundancy system configuration.

MPS 500 supports 1+1 redundancy only.

Sample MPS 1000 N+1 Redundancy System Configuration

N+1 redundancy also works in non-homogeneous configurations. The primary nodes

can have different MPS and/or common component configurations than the secondary

(backup) node.

N+1 redundancy is designed to protect against MPS/node function failures that result

in the inability of the TMS hardware to communicate with its controlling MPS/node.

N+1 cannot protect against TMS hardware failures.

During normal system operation, the backup node only monitors the primary nodes,

referred to as “secondary/standby mode”. When an MPS component on one of the

primary nodes fails, the secondary node assumes the configuration of the primary

node, picks up all current call activity, and continues call processing within a short

period of time, referred to as “secondary/active mode”. After the problems on the

primary components are resolved and they are running normally again, the backup

node can automatically return control back to the primary node (if auto-failback is

tmsi01 (primary)

MPS1 MPS2

tmsi02 (primary)

MPS3 MPS4

MPS10 MPS11

TMS1 TMS2 TMS3 TMS4

tmsi100 (secondary)

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Avaya Media Processing Server Series System (Software Release 2.1) Uživatelský manuál Strana 267