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L3VPN services are widely deployed in service provider networks, and their reliable operation over SR-MPLS is a requirement. We verified that the multi-vendor SR-MPLS underlays with different IGP control planes are able to successfully support L3VPN services without facing issues with forwarding behavior. Using the topologies below, we verified that L3VPN services can be established over an SR-MPLS network with different IGP control planes. We executed the test in two single-domain variants. In the IS-IS case, we built an SR-MPLS domain with three spine nodes and established MP-BGP between all Provider Edge (PE) devices to exchange VPN routes. In the OSPF case, we repeated the same procedure using a single spine node while keeping the PE-side service configuration unchanged. For the two scenarios, we verified the underlay control plane by ensuring that segment routing information is advertised correctly and that MPLS label installation and forwarding entries are as expected. We then enabled the L3VPN service and generated traffic for IPv4 L3VPN traffic between PE devices. The traffic was forwarded from PE to PE without loss. This confirmed that VPN route exchange and SR-MPLS label forwarding across a multi-vendor setup worked correctly. |
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Note: The traffic generator was connected to a switch that was linked to all PE devices, enabling simultaneous communication with all PEs. |
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[[~[~[Figure 62: SR-MPLS L3VPN over IS-IS~>~>image:486179564442746881_SRMPLS-01-L3VPN-ISIS-Generic-1-v1.png~|~|alt="Figure 62" width="550"~]~]>>attach:486179564442746881_SRMPLS-01-L3VPN-ISIS-Generic-1-v1.png||target="_blank"]] |
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[[~[~[Figure 63: SR-MPLS L3VPN over OSPF~>~>image:486179564442812417_SRMPLS-01-L3VPN-OSPF-Generic-1-v1.png~|~|alt="Figure 63" width="550"~]~]>>attach:486179564442812417_SRMPLS-01-L3VPN-OSPF-Generic-1-v1.png||target="_blank"]] |
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{{container cssClass="tc-role-table"}} |
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|=PE|=Spine|=Traffic Generator |
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|((( |
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Arista 7280R3, |
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19 |
Ciena 5164, |
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20 |
Ciena 8192, |
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Ericsson RAN Connect 6682, |
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Ericsson Router 6676, |
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HPE MX204, |
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HPE PTX10002-36DD, |
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Keysight IxNetwork, |
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Nokia 7730 SXR-1x-44s, |
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Nokia 7750 SR-1, |
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Rbbn NPT-2507, |
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ZTE ZXCTN 6120H-S, |
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ZTE ZXR10 M6000-2S16, |
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ZTE ZXR10 M6000-3S Plus, |
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ZTE ZXR10 M6000-4SE, |
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ZXCTN 6120H-E, |
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Raisecom RAX721-T-4C24, |
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Raisecom iTN8800-A |
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)))|((( |
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Arista 7280R3, |
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Ciena 5164, |
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HPE ACX7100-48L |
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)))|Keysight IxNetwork |
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Table 31: L3VPN over SR MPLS - Single-domain IPv4 IS-IS |
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{{/container}} |
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Arista 7280R3, |
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Ciena 5164, |
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Ciena 8192, |
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Ericsson RAN Connect 6682, |
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Ericsson Router 6676, |
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Keysight IxNetwork, |
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Nokia 7750 SR-1, |
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56 |
Rbbn NPT-2507, |
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57 |
ZTE ZXCTN 6120H-S, |
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58 |
ZTE ZXR10 M6000-2S16, |
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ZTE ZXR10 M6000-3S Plus, |
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ZTE ZXR10 M6000-4SE, |
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ZXCTN 6120H-E, |
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Raisecom RAX721-T-4C24, |
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Raisecom iTN8800-A |
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)))|Ciena 5164|Keysight IxNetwork |
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Table 32: L3VPN over SR MPLS - Single-domain IPv4 OSPF |
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{{/container}} |
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|[[< Previous>>doc:Main.EANTC Transport & Cloud Networks Interop Test Report 2026.SR-MPLS.WebHome]]|[[Next ~>>>doc:Topology Independent Loop Free Alternative over SRMPLS]] |
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