VCP6-NV Official Cert Guide (Exam #2V0-641) by Elver Sena Sosa

Author:Elver Sena Sosa
Language: eng
Format: epub
Publisher: Pearson Education Limited (US titles)
Published: 2017-03-17T04:00:00+00:00

Figure 10-17 ARP request sent over the Layer 2 VPN

The replication happens over VXLAN overlays.

Step 12. ServerApp01 receives the ARP request and processes it.

The local copy of Layer 2 VPN – TPA in ESXi host COM-A1-ESXi02 learns the MAC address of ServerApp02.

Step 13. ServerApp01 sends a unicast ARP reply to ServerApp02.

Step 14. Logical switch Layer 2 VPN – TPA receives the ARP reply, processes it, and sends it over to COM-B1ESXi01 over a unicast VXLAN overlay.

The logical switch learned the MAC address of ServerApp02 in step 12.

We covered how ARP replies are handled in Chapter 6.

Step 15. Logical switch Layer 2 VPN – TPA in COM-B1ESXi01 receives the ARP reply, processes it, and sends it to Edge L2-VPN-T’s interface Internal-TPA.

a. The logical switch learns ServerApp01’s MAC address.

b. The logical switch learned ServerApp02’s MAC address in step 10.

Step 16. Edge L2-VPN-T receives the ARP reply, puts it in a Layer 2 VPN tunnel, and sends it to Edge L2-VPN-S.

The tunnel goes out of the Uplink interface External-TPA, toward the physical network.

Step 17. Edge L2-VPN-S receives the tunnel traffic over its Uplink Interface External-SDQ, validates it, and decapsulates it.

Step 18. Edge L2-VPN-S takes the ARP reply and sends it to logical switch Layer 2 VPN – SDQ.

The traffic is sent out over the Internal interface, Internal-SDQ.

Step 19. Logical switch Layer 2 VPN – SDQ learns the MAC address of ServerApp01 and tells the NSX Controller.

Step 20. Logical switch Layer 2 VPN – SDQ receives the ARP reply and processes it.

Step 21. Logical switch Layer 2 VPN – SDQ forwards the ARP request in a VXLAN overlay unicast to COM-B1-ESXi02.

Step 22. ServerApp02 receives the ARP reply, adds the entry to its ARP table, and sends the first ping to L2-T-MV2, as shown in Figure 10-18.

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