Virtual Device Contexts (VDC)

What is VDC and how it works VMware aims at server & application virtualization, while VDC is a virtualization technology for Networking devices and it enables several Virtual Multilayer Switches Instances (also named VDC instance or logical device) in a single physical Cisco Nexus device. Each Virtual Multilayer Switch Instance has its own independent and …

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Virtual Port Channel (vPC) Basics

vPC Technology has been introduced by Cisco Nexus OS as a key component of Cisco Data Center Networking architecture. The major benefits it brings are: Loop avoidance logic allows 2 physical connections from 1 device to 2 Nexus Switches to operate in active/active mode and eliminate STP blocked port to fully utilize the uplink bandwidth. …

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Basic Tips for CUCM Troubleshoot & Verification

This thread focuses on the basic troubleshooting of those simple problems arising from install & initial setup, system configuration, daily maintenance tasks etc. Monitoring TFTP / SFTP / FTP / Signaling events Whenever you upload phone firmware or upgrading package through SFTP / FTP / TFTP, to verify if the uploading is in progress, you …

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Networking in VMware World

Terminologies in VMware Networking: The key virtual networking components provided by Virtual Infrastructure are: Virtual Ethernet Adapters, used by individual virtual machines.In most cases, a virtual machine uses only one of the three types of virtual adapters. vmxnet: works only if VMware Tools is installed in the guest operating system. The vmxnet adapter is designed …

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