The chapters in this part explains the requirements and processes to install or upgrade Geo Redundancy in the Crosswork Network Controller solution.

Attention

Geo Redundancy is an optional functionality offered by Crosswork Network Controller solution. For any assistance, please contact the Cisco Customer Experience team.

The geo redundancy solution ensures business continuity in case of a region or data center failure for on-premise deployment. It adds another layer of protection in the high availability stack for Crosswork through geographical or site redundancy. Geo redundancy protects against entire site failure, reduces disruption during system upgrades, and reduces overall data loss. 

Geo redundancy involves placing physical servers in geographically diverse availability zones (AZ) or data centers (DC) to safeguard against catastrophic events and natural disasters.

Some of the key factors that ensure geo redundancy are:

• VM Node availability: Ensure that both the active and standby clusters are configured with the same number of virtual machines (cluster nodes, NSO, Crosswork Data Gateway, etc.) and maintain same level of network accessibility between the clusters and the network nodes.

• Geo availability of Nodes: Physical data centers must not share any common infrastructure, such as power and network connectivity. It is recommended to place them in different availability zones (AZ) or regions to avoid a single point of failure that could impact all the VM nodes.

• Network Availability: To keep the clusters synchronized, the network link between the data centers must meet the availability and latency requirements detailed later in this chapter.