4.0 Virtual Infrastructure HA – Requirements:

This section is written with the goal to ensure that there is alignment with Section 4.2 of the ETSI/NFV REL-001 document.

Key reference requirements from ETSI/NFV document:

[Req.4.2.12] On the NFVI level, there should be a transparent fail-over in the case of for example compute, memory,storage or connectivity failures.

  • The virtual infrastructure should provide classified virtual resource for different SAL VNFs. Each class of the resources should have guaranteed performance metrics.
  • Specific HA handling schemes for each classified virtual resource, e.g. recovery mechanisms, recovery priorities, migration options, should be defined.
  • The NFVI should maintain the number of VMs provided to the VNF in the face of failures. I.e. the failed VM instances should be replaced by new VM instances.

4.1 Compute

VM including CPU, memory and ephemeral disk


4.2 Network

Virtual network:


  • Redundant top of rack switches must be supported as part of the deployment.
  • Static LAG must be supported to ensure sub 50ms detection and failover of redundant links between nodes. The distributed virtual router should support HA.
  • Service provided by network agents should be highly available (L3 Agent, DHCP agent as examples)
  • L3-agent, DHCP-agent should clean up network artifacts (IPs, Namespaces) from the database in case of failover.

vSwitch Requirements:

  • Monitoring and health of vSwitch processes is required.
  • The vSwitch must adapt to changes in network topology and automatically support recovery modes in a transparent manner.