Specifications

HP Virtual Connect for Cisco Network Administrators (version 1.2x) page 18
of the external switch port, a single vNet could represent a single VLAN or a single vNet could
represent multiple VLANs.
Figure 6. VLAN Tagging Examples
(see Appendix A for a description of the elements in the above diagram)
Explanation of the Figure Above:
• VC Uplink 3 is assigned to a Shared Uplink Set (SUS) and is tagged with VLANs 2 thru 4.
o The external switch port is a trunk port carrying VLANs 2 thru 4
o VLAN 2 is represented by vNet-PROD2-A, VLAN 3 is represented by vNet-PROD3, and
VLAN 4 is represented by vNet-PROD4.
• VC Uplink 2 is assigned to vNet_ESX and is operating in 802.1Q tunneling mode.
o The external switch port is a trunk port carrying VLANs 2 thru 4.
o vNet_ESX is a single vNet that represents VLANs 2 thru 4.
• VC Uplink 1 is assigned to vNet-PROD2-B and is operating in access mode.
o The external switch port is an access port assigned to VLAN 2.
o vNet-PROD2-B represents a vNet operating in ‘acccess mode’ for external VLAN 2.
• NIC 1 on both Server 1 and Server 2 have VLAN tagging configured on the server. On both
servers, NIC 1 represents VLANs 2 thru 4.
• All other NICs are not using VLAN tagging. All of these NICs are connected to a single VLAN
(see color for VLAN association).
• NIC 1 on Server 1 can talk directly to NIC 1 on Server 2 without leaving the VC Domain.
• In order for NIC 2 on Server 1 to talk to NIC 2 on Server 2, the frames must first exit the VC
Domain via VC uplink 1, transit the external switch on VLAN 2, and then re-enter the VC
Domain on VC uplink 3.