Configuring DCI Functions
This section describes how to configure Data Center Interconnect (DCI) functions, which helps you understand basic DCI information.
Background
To meet the requirements of cross-region operation, user access, and inter-city disaster recovery that arise during enterprise development, an increasing number of enterprises have deployed data centers in multiple regions and across carrier networks. Currently, leased fibers or leased lines are commonly used to interconnect cross-region data centers, causing the following disadvantages:
- For enterprises, leased fibers or leased lines are costly.
- For carriers, service exploration is difficult, and resource utilization is low.
To cope with these disadvantages, a DCI network that is characterized by high security and reliability and flexible scheduling needs to be constructed and operated. Data Center Interconnect (DCI) provides solutions to interconnect data centers. Using Virtual extensible local area network (VXLAN), Ethernet virtual private network (EVPN), and BGP/MPLS IP VPN technologies, DCI solutions allow packets that are exchanged between data centers to be transmitted securely and reliably over carrier networks, allowing VMs in different data centers to communicate with each other.
Figure 1 Configuring DCI functions
- Configuring E2E VXLAN EVPN in a DCI scenario with Gateways Deployed
- An end-to-end VXLAN EVPN uses the same service platform, which helps implement unified VXLAN VNI resource management.
- Configuring a DCI Scenario with a VLAN Layer 3 Sub-interface Accessing a Common L3VPN
- The DCI Scenario with a VLAN Layer 3 Sub-interface Accessing a Common L3VPN uses different cloud management platforms, and a Layer 3 Ethernet sub-interface is associated with a VLAN to access an L3VPN.
- Configuring a DCI Scenario with VXLAN EVPN L3VPN Accessing Common L3VPN
- The DCI scenario with VXLAN EVPN L3VPN accessing common L3VPN uses different cloud management platforms, and VXLAN tunnels are used to access the DCI backbone network.
- Configuring a DCI Scenario with a VLAN Base Accessing an MPLS EVPN IRB
- In a DCI scenario, Ethernet sub-interfaces are associated with VLANs to access gateways or the DC network and the EVPN IRB function is enabled to allow the DCI network to carry Layer 2 or Layer 3 services.
- Configuring a DCI Scenario with VXLAN EVPN Accessing MPLS EVPN IRB
- In a DCI scenario with VXLAN EVPN accessing MPLS EVPN IRB, different cloud platforms are used for management. VXLAN tunnels are established for access to the DCI backbone network, over which EVPN MPLS is used to carry Layer 3 services.
- Verifying the Configuration of DCI Functions
- After configuring the DCI solution, check the VPN instance, EVPN instance, and VXLAN tunnel configurations.