Testking VCP-410

4. Assign each physical NIC to a port group and a vSwitch. 5. Use separate physical NICs to handle the different traffic streams, such as network packets generated by VMs, iSCSI protocols, VMotion tasks, and service console activities. 6. Ensure that the physical NIC capacity is large enough to handle the network traffic on that vSwitch. If the capacity is not enough, consider using a high-bandwidth physical NIC (10Gbps) or moving some VMs to a vSwitch with a lighter load or to a new vSwitch. 220 701 7. If packets are being dropped at the vSwitch port, increase the virtual network driver ring buffers where applicable. 8. Verify that the reported speed and duplex settings for the physical NIC match the hardware expectations and that the hardware is configured to run at its maximum capability. For example, verify that NICs with 1Gbps are not reset to 100Mbps because they are connected to an older switch. 9. Verify that all NICs are running in full duplex mode. Hardware connectivity issues might result in a NIC resetting itself to a lower speed or half duplex mode. 10. Use vNICs that are TSO-capable, and verify that TSO-Jumbo Frames are enabled where possible. o Tasks represent system activities that do not complete immediately, such as migrating a VM. o If you are logged in to a vCenter Server system that is part of a Connected Group, a column in the task list displays the name of the vCenter Server system on which the task was performed. Appendix A – Defined privileges Appendix B – Installing the MS sysprep tools Appendix C – Performance metrics ESX Configuration Guide o A vNetwork Distributed Switch acts as a single vSwitch across all associated hosts on a datacenter. This allows virtual machines to maintain consistent network configuration as they migrate across multiple hosts. A dvPort is a port on a vNetwork Distributed Switch. 220 702 o The VMkernel TCP/IP networking stack supports iSCSI, NFS, and VMotion. Virtual machines run their own systems’ TCP/IP stacks and connect to the VMkernel at the Ethernet level through virtual switches. o TCP Segmentation Offload (TSO), allows a TCP/IP stack to emit very large frames (up to 64KB) even though the maximum transmission unit (MTU) of the interface is smaller. The network adapter then separates the large frame into MTU-sized frames and prepends an adjusted copy of the initial TCP/IP headers. o The default number of logical ports for a vSwitch is 56. o Each uplink adapter associated with a vSwitch uses one port. o You can create a maximum of 127 vSwitches on a single host. (EDIT the current Maximums PDF says 248) o Maximum of 512 port groups on a single host. o For a port group to reach port groups located on other VLANs, the VLAN ID must be set to 4095. If you enter 4095, the port group can see traffic on any VLAN while leaving the VLAN tags intact. o VLAN ID is a number between 1 and 4094. o ESX supports only NFS version 3 over TCP/IP. o You can create a maximum of 16 service console ports in ESX. o CDP advertisements typically occur once a minute. o dvPort group properties include: o Port Binding - when ports are assigned to virtual machines connected to this dvPort group. o Static binding - to assign a port to a virtual machine when the virtual machine is connected to the dvPort group. o Dynamic binding - to assign a port to a virtual machine the first time the virtual machine powers on after it is connected to the dvPort group. 220 701 o Ephemeral - for no port binding. o Whether to allow live port moving. o Config reset at disconnect to discard per-port configurations when a dvPort is disconnected from a virtual machine. o Binding on host allowed to specify that when vCenter Server is down, ESX can assign a dvPort to a virtual machine. o Port name format to provide a template for assigning names to the dvPorts in this group. o Private VLANs are used to solve VLAN ID limitations. o A private VLAN is identified by its primary VLAN ID. A primary VLAN ID can have multiple secondary VLAN IDs associated with it. Primary VLANs are Promiscuous, so that ports on a private VLAN can communicate with ports configured as the primary VLAN. Ports on a secondary VLAN can be either: o Isolated - communicating only with promiscuous ports o Community - communicating with both promiscuous ports and other ports on the same secondary VLAN. o Only one VMotion and IP storage port group for each ESX host. o You can enable or disable IPv6 support on the host. o The following networking policies can be applied: o Security o Promiscuous Mode - In non-promiscuous mode, a guest adapter listens only to traffic forwarded to own MAC address. In promiscuous mode, it can listen to all the frames. By default, guest adapters are set to non-promiscuous mode.