SRv6 Application for Cross-Domain Cloud Backbone Private Lines
In the cloud era, enterprise services may concurrently access multiple types of clouds, and the clouds in different regions may need to be interconnected. Traditionally, only solutions such as Option A/B/C and seamless MPLS can be used for interconnecting clouds across different regions. These solutions, however, require multiple geographically dispersed departments to collaborate to provision services. Furthermore, they involve a large number of protocols and complex network states, adversely affecting service O&M and network reliability.
As shown in Figure 1, a carrier uses the SRv6 Overlay solution to deploy cross-domain cloud backbone private lines on a new type of metro network that features multi-cloud aggregation.
This solution offers the following benefits:
- Fast service provisioning: Only the metro devices in city A and the DC egress devices in city B need to be upgraded before SRv6 can be deployed. The SRv6 VPN is deployed across the backbone network, quickly constructing cross-province cloud backbone private lines between cities A and B.
- On-demand upgrade and evolution: On-demand path selection can be implemented if SRv6 is deployed on key transit nodes. Furthermore, traffic can be directed to traverse the backbone network according to service requirements, facilitating network path optimization.
- Excellent cross-domain service experience: SRv6 eliminates multi-segment stitching that is used in traditional cross-domain private line scenarios, facilitating cross-domain network access and enabling one-hop cloud access. Furthermore, L3 technologies such as L3VPN and EVPN L3VPN are used to implement cloud private line bearing and inter-cloud interconnection, and the L3 network routing capability enables enterprise sites to achieve one-point and flexible access to any cloud resource pool. By leveraging SRv6 TE Policy, SRv6 provides differentiated SLA guarantee for various cloud applications.