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RFC7432bis has defined the new "EVPN Layer 2 Attributes Extended Community," which allows for the control of Layer 2 Maximum Transmission Unit (MTU), Control Word (CW), and flow label. |
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In our test, we configured EVPN-VPWS as the overlay service and began advertising the Layer 2 Attributes Extended Community using BGP. Initially, all settings for CW, MTU, and flow control were matched, ensuring that the EVPN-VPWS service was operational. Subsequently, we intentionally configured mismatches for any of the three parameters to verify that the EVPN-VPWS service would go down. No traffic was sent during the entire test. |
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The results are as follows: |
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- Arista: CW, MTU |
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- Arrcus: CW, Flow label, MTU |
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- H3C: CW, Flow label, MTU |
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- Ribbon: MTU |
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[[Figure 35: EVPN SR-MPLS L2 attribute Extended Community>>image:434054838033055745_1.39-mpls.png||alt="Figure 35" width="550"]] |
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|[[< Previous>>doc:EVPN Port-Active Redundancy Mode]]|[[Next ~>>>doc:IP Prefix Route -Floating IP Overlay Index Use Case]] |
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