What is VSS mode?

The Cisco Catalyst 6500 Series Virtual Switching System (VSS) allows the clustering of two or more physical chassis together into a single, logical entity. This technology allows for enhancements in all areas of network design, including high availability, scalability, management, and maintenance.

How do VSS work?

Microsoft’s VSS operates by taking what is called a copy on write snapshot of your system. This allocates a small temporary storage space. Then, every time you write to a part of your disk, the information on the disk is first copied to the snapshot before allowing the write to take place.

What is the difference between stacking and VSS?

The VSS also simplifies the Layer 3 network topology because the VSS reduces the number of routing peers in the network. Stack Switching: Stack Switching is the concept of stacking the various switching via stack cables so that they can act like a single switch with various ports.

What is a VSS pair?

The Virtual Switching System (VSS) allows two Cisco Catalyst 6500 or 4500 chassis to bond together so that is seen as a single virtual swich to the rest of the network.

How do I set up VSS?


  1. Open Windows Explorer or the Microsoft Management Console (MMC) Disk Management snap-in, then right-click the drive.
  2. Select Properties from the context menu.
  3. Select the Shadow Copies tab.
  4. Under “Select a volume,” select the volume for which you want to enable Shadow Copies. …
  5. Click Settings to configure VSS.

What is SSO in VSS?

SSO = Stateful switchover , establish a relation of active / passive between 2 supervisor engines in a chassis to provide uninterrupted L2 functionality in case of a hardware failure.

What is VSS provider?

VSS provider The component that creates and maintains the shadow copies. This can occur in the software or in the hardware. The Windows operating system includes a VSS provider that uses copy-on-write.

How do I know if VSS is enabled?


  1. Open a command window. …
  2. At the command prompt, type vssadmin list providers, and then press ENTER.
  3. Confirm that Microsoft VSS provider is listed as: …
  4. Type vssadmin list writers at the command prompt, and then press ENTER.
  5. Confirm that all the VSS writers are showing:

Is VSS a ground?

VSS is normally the system ground and the term VSS is often used interchangeably with the term GND.

What is the purpose of a virtual switch?

A virtual switch connects virtual machines (VMs) with both virtual and physical networks. This allows virtual machines to exchange data traffic between one another as well as with the organization’s intranet and the internet.

What is difference between VSS and vPC?

2) In VSS there will be single control plane for both the switches, where as in vPC there will be separate control plane for every switch. 3) VSS can support L3 port-channels across multiple chassis,however, vpc is used for L2 port-channels only.

What is the full form of VSS?

VSS: Volume Shadow Copy Service

The full form of VSS is Volume Shadow Copy Service. It is also known as Volume Snapshot Service. It is a technology developed by Microsoft included in MS Windows that can create backup copies or snapshots of computer files or volumes, even when they are in use.

What is VSS and VRS?

Essentially both VSS (Voluntary Separation Scheme) and VRS (Voluntary Retirement Scheme) are aimed at reducing the manpower in an organisation by tempting an employee with compensation based on the number of years of service put in and the number of years of service left.

When was the VSS made?


VSS Vintorez
Designed 1980s
Manufacturer Tula Arms Plant
Produced 1987–present
Variants see Variants

What is VSS and VDD?

Vdd refers that the supply voltage pin is connected to the drain of the transistor. Vss refers that the supply voltage pin is connected to the source of the transistor.

What is VSS voltage?

Nowadays it is always used Vdd and Vss to refer to the positive and negative voltage respectively. Vdd is normally was used to be 5V but nowadays is 3.3V or even lower 1.8V or 1.2V. Vss is referred to be zero volts.

Why is ground called VSS?

They are all supply voltages. Vcc = Collector supply voltage, Vee = Emitter supply, Vdd = Drain supply, Vss = source supply.

What is VSS in LCD?

In practice today VCC/VDD means positive power supply voltage and VEE/VSS is for negative supply or ground.

What is VCC VDD and VSS?

1. For digital circuits, VCC is the supply voltage of the circuit, VDD is the operating voltage of the chip (usually Vcc>Vdd), and VSS is the ground point. 2. Some ICs have both VDD and VCC pins, indicating that the device itself has a voltage conversion function.

How much current is required for LCD?

The LCD current consumption of a segment LCD module at normal operating temperature is between 1.2uA/square cm to 1.5uA per square cm. Note: The colder the operating temperature, the more current is required to keep a sharp contrast.

How many volts does a LCD need?

Typically, 3.3V or 5V (depending on the display).

What is the voltage of LED?

Typically, the forward voltage of an LED is between 1.8 and 3.3 volts. It varies by the color of the LED. A red LED typically drops around 1.7 to 2.0 volts, but since both voltage drop and light frequency increase with band gap, a blue LED may drop around 3 to 3.3 volts.

What is RW in LCD?

The Read/Write (RW) pin (pin 5) of a HD44780 LCD is the pin which either enables a user to write to the LCD so that it displays characters (write mode) or to read the characters from the LCD so that are on it (read mode). The dominant majority of the time, the RW pin will be set to Write mode.

What is RS pin LCD?

The RS pin is the Register Selector pin for the LCD controller. The HD44780 has two registers: an Instruction Register (IR) and a Data Register (DR). The RS pin is a control pin that specifies whether the IR or DR should be connected to the Data Bus (DB0 to DB7 pins).

What is the function of RS RW and E pins of LCD?

Basic Commands

The LCD controller uses RS and RW lines along with E to operate the LCD. Resister Select (RS): Determines weather a command(RS = 0) is sent (to set up the display) or actual data(RS=1) is sent. Read/Write RW=0; writes to the LCD. RW=1;Reads from the LCD.

What is the function of RS R W and E pins of LCD?

The RS (data/instruction select) bit tells the LCD whether we are going to send an instruction or a piece of data. The R/W (read/write) bit tells the LCD whether we wish to read from or to write to RAM. The E (enable) bit tells the LCD when it should read the data lines.