PCEP
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MPLS Guide
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Figure 19 NSP Ecosystem Redundancy
NSP ecosystem redundancy consists of two mechanisms that can be deployed
separately or together:
• High-Availability (HA) at a single site
- the NSP, where the applications reside, is protected by a cluster of three
Virtual Machines (VMs)
- the VSR-NRC module, which implements PCEP, OpenFlow, and BGP-LS/
IGP, does not support HA and is deployed with a single VM that contains
the combined CPM and IOM codes
• DR, which consists of a primary site and a secondary standby backup site. Each
site consists of an NSP cluster and a VSR-NRC VM complex. A heartbeat
protocol runs between the NSP clusters at the primary site and the standby
backup site.
The VSR-NRC can be deployed as a standalone configuration; however, the
NSP must be deployed in a cluster at each site. This configuration is also
referred to as a 3+3 deployment.
Each parent NSP cluster establishes a reliable TCP session with a virtual IP to the
local VSR-NRC. The TCP session runs an internal protocol, also known as cproto.
This configuration is done prior to system startup and cannot be changed with an
active NSP; the NSP must be shut down for any changes.
sw0645
Primary Site
VSR-NRC VSR-NRC
NSP Cluster
Routers
192.168.48.1 192.168.48.2
NSP Cluster
Neo4j and PostgreSQL Sync Up
Secondary
Standby
Backup Site
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