virtual PortChannel, or vPC. Although a pair of switches acting as a vPC peer endpoint looks like a single logical entity to PortChannel-attached devices, the two devices that act as the logical PortChannel endpoint are still two separate devices. This environment combines the benefits of hardware redundancy with the benefits of PortChannel loop management. The other main benefit of migration to an all-PortChannel-based loop management mechanism is that link recovery is potentially much faster. Spanning Tree Protocol can recover from a link failure in approximately 6 seconds, while an all-PortChannel-based solution has the potential for failure recovery in less than a second.
phone card on 21 May 19buying a phone system for your small business, consider that it's all about the acronyms. For example: Do you know a KSU from a VoIP? Before you buy, it's good to understand the differences among the types of systems and the terminology used, otherwise you may find yourself drowning in alphabet soup. Here are some of the terms and features that you need to consider when buying a phone system for your small business. Key Services Unit (KSU) In the more old-school in-office systems, a key system is typically used for employers with five to 40 employees. A key services unit (KSU) enables ordinary phones to handle multiple lines and make calls to other in-office extensions. KSU-less systems are a cheaper option for companies with fewer than 10 people: The phones contain the technology, and the system is not permanently wired into the office space. Private Branch Exchange (PBX) PBX systems fit companies with more than 40 employees, or companies that need more advanced, customizable options. Bulky PBX systems in closets are things of the past: With improved technology, the newer models can fit comfortably on a shelf or a desk.
