By Microsoft Corporation
Part of a chain of specialised publications on approach middle - this booklet promises a centred assessment of community virtualization services and cloud computing situations. sequence editor Mitch Tulloch and a workforce of approach middle specialists supply concise technical advice as they step you thru key technical situations and concerns.
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Extra info for Microsoft System Center: Network Virtualization and Cloud Computing
The HNV filter de-encapsulates the packet and now has the inner packet (the original IP packet), plus the OOB data contains the VSID (6001). The HNV filter delivers the IP packet (the inner packet from the previous step) to the Hyper-V switch with the corresponding OOB data containing the VSID (6001). The Hyper-V switch does any required VSID ACL’ing and then delivers the IP packet to the VM. In this scenario, the packet was NVGRE encapsulated but the encapsulation was completely transparent to both the sending and receiving VMs.
When Contoso1 communicates with the Contoso physical server, the packet flow is as follows: These IP addresses are on different subnets so Contoso1 sends ARP messages to the default gateway and not the IP address directly. The Hyper-V switch broadcasts the ARP to the HNV filter. The HNV filter responds to the ARP with MACDFGW. MACDFGW is associated with the HNV filter itself. 1 in this case. 1) on VSID 5001 (included in the OOB data for this MAC address). Contoso1 sends an IP packet destined for the physical Contoso server with the MAC address of the default gateway so that the packet is delivered to the default gateway to be routed appropriately.
This packet is delivered to the Hyper-V switch and gets the VSID associated (5001) with the sender’s VM network adapter as out-of-band (OOB) data. The HNV filter verifies Contoso1 and Contoso2 are in same VM network, otherwise the packet is dropped. The HNV filter uses its lookup records to determine the PA of the destination VM. If there is no lookup record for the IP address, the packet is dropped. CHAPTER 1 Hyper-V Network Virtualization internals 27 The HNV filter rewrites the packet to change the destination MAC address to MACContoso2.
Microsoft System Center: Network Virtualization and Cloud Computing by Microsoft Corporation