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Network Migration Stream (High Level Design. Captures the connectivity…

- - - - Telstra MPLS Network - Services TEG Offices, Sites and Venues, Aegis Call Centre, Dispatch and Temporary Sites (via 4G)
      - Spark MPLS Network - Services TEG Offices in New Zealand
      - Site to Site VPN - International Sites and Third Party Sites
      - Remote Access - Users using Cisco AnyConnect
    - - Security and Access Control of the North/South Flows (between Internal and External Networks) are enforced by the ASA 5520 Firewalls.
      - The ASAs also terminate the Site to Site VPNs and enable Remote Access using the Cisco AnyConnect client. The ASAs also leverage the Active Directory hosted on the Domain Controllers to enable Role Based Access Control for the VPN.
      - The Internet Gateways enable Internet Access for Sites and Venues connected into the WAN.
    - - DC Environment and MPLS Networks aren't easily scalable and lack cost efficiencies across all sites.
      - Temporary Sites utilising 4G may experience issues with reliability, being dependent on location.
      - Most sites and venues only have one route, which doesn't consider for resiliency. Also, third-party sites aren't regulated regarding hardware and network requirements therefore, service levels are not guaranteed equal across all sites.
      - Lack of consolidation around coordination and logistics of deploying venue-owned site and temporary site links.
        
        Relay between multiple parties, to organise the links.
- - - - Represents TEG Offices, Sites/Venues, Aegis Call Centre and Dispatch
    - - Represents TEG Office in New Zealand and International Sites. Also, some Third Party Sites and Venues.
    - - Represents - Temporary Sites and Venues, Some Third Party Sites and Venues
- - - - Through DevOps, methods and tools can be built to take advantage of the environment, enabling infrastructure and resources to be deployed and destroyed at will, allowing dynamic scaling to meet demand.
      - By adopting Infrastructure as Code, rapid re-deployment and flexibility in deployment patterns can be enabled, simplifying change and rollback processes.
      - APIs on the network infrastructure can also be leveraged to perform tasks such as automated changes from a click of a button, avoiding the traditional approach of performing changes on a per-device basis.
- - - - Service Provider and Hardware Vendor Agnostic
      - Cost Effective
      - Globally Scalable
  - - - Tier 1 Sites
        
        The MPLS Network (Primary) and the Internet is the Secondary. Reducing cost.
      - Tier 2 Sites
      - Centralised Perimeter Protection Plane for Remote Users and Sites
- - - - Read Challenges/Considerations
    - - Meaning, continual progression of the project with gaps and issues addressed in future iterations.
        
        The migration can occur quicker, as each phase doesn't rely on the completion of the previous. i.e. execution in parallel.
        
        Allows capacity to change directions if needed.
        
        May introduce more unknowns.
        
        As represented at a high-level, a feedback loop to is present to enable on-going innovation. We'll be going into more detail in the coming slides.
  - - - All offices were Tier 1
        
        With a run rate of one migration a day
      - All sites and venues were Tier 2
        
        With a run rate of two migrations per day
      - All agencies (i.e. third party sites) were Tier 3
        
        With a run rate of three migrations per day