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Results Summary and Analysis

The provision and validation of the Data Center Interconnect methods didn’t show any anomalies in terms traffic loss. However here are some of the observations from Test validation:

  1. The qualification of MACSEC functionality didn’t display any issues in terms on traffic flow and the traffic was encrypted end to end.
  2. For Type 2 seamless stitching DCI, it was observed for Collapsed fabric the extra overlay routes were advertised to the collapsed leaf switches, hence a policy was applied to stop re-advertisement of the routes using configlet.
  3. During link failure, the convergence times was less than 5 seconds for all three DCI methods. Overlay BFD was used to improve convergence times.
  4. For MAC move between data centers, it was observed for approximately 2000 MAC the convergence times were approximately 3 seconds for all three DCI methods.
  5. The chosen path in case of Inter-VLAN, Inter-VRF and Intra-VLAN are as below for all three methods are as below.
    Table 1: : DCI Flow Path
    DCI Flows Inter-VLAN Intra-VLAN Inter-VRF
    OTT Flows Type 5 stitching Type 2 stitching Default route to External Gateway for Inter-VRF routing and then Type 5 route to remote leaf switch.
    Type 2 Seamless Stitching Flows - Type 2 stitching Default route to External Gateway for Inter-VRF routing, then back to Border Leaf switch and uses Type 2 route from Border leaf switch to remote leaf switch.
    Type 2 and Type 5 Seamless Stitching Type 5 stitching Type 2 stitching Default route to External Gateway for Inter-VRF routing, then back to Border Leaf switch and uses Type 5 to remote Border leaf switch.
  6. The scale numbers for each of the DCI methods are shown below and are not maximum. In case of Type 2 and Type 5 seamless stitching, the scale depends on the overlay next-hop limit of QFX5130-48C.
Table 2: : Scaling per DCI Method
Devices VLANS VNIs with IRB Hosts per VN per port DCI VTEPS Stretched VNIs Global MAC Global MAC_IP Global NDP Hosts BGP Total Paths BGP Active Paths
OTT with MACSEC 800 10 30 NA 60000 98715 8000 904785 430329
Type 2 Seamless Stitching with MACSEC 600 5 NA 500 16000 25409 7000 191354 95680
Type 2 and Type 5 Seamless Stitching 1000 5 NA 800 27090 50953 8000 412073 235558

Overall, the JVD validation testing didn’t detect any issues, and all performance parameters were within the threshold and performed as expected.