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---- |
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Many service providers are transitioning to SRv6 for its programmability and streamlined network operations, but MPLS remains extensively deployed. Interworking plays a crucial role in enabling a phased migration, allowing SRv6 and MPLS to coexist within the same network without requiring a complete infrastructure change. |
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In order for this to happen, gateways must be deployed between these domains. These gateways provide service interworking on the control and data planes: |
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They need to import service routes and re-advertise them for the control plane. For the data plane, they perform a pop/decap operation, followed by an IP lookup, and then proceed with a push/encap operation. |
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For this test, we verified that the gateways replaced the MPLS label with an SRv6 Service SID (End.DT4 with NEXT-CSID for IPv4, End.DT6 with NEXT-CSID for IPv6). Then, the prefix was advertised as a VPNv4/VPNv6 route in SRv6. In the reverse direction, the gateway converted SRv6 SIDs back to MPLS labels and rewrote the next-hop and label stack for correct forwarding in the SR-MPLS domain. |
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[[Figure 99: __EVPN RT5 SR MPLS- L3VPN SRv6 Interworking__>>image:432751331699064833_EVPN RT5 SR MPLS- L3VPN SRv6 Interworking.png||alt="Figure 99" width="550"]] |
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|=PE|=SRv-SRmpls GW|=Traffic Generator |
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Arista 7280R3, |
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Nokia 7250 IXR-e2 |
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Arista 7280R3, |
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Nokia 7750 SR-1 |
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)))|Keysight IxNetwork |
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Table 54: EVPN RT5 SR MPLS- L3VPN SRv6 Interworking - µSID |
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|[[< Previous>>doc:Resource guarantee Slicing over Srv6]]|[[Next ~>>>doc:Main.Multi-Vendor MPLS & SDN Interoperability Test Report 2025.Time Synchronization.WebHome]] |
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