> For the complete documentation index, see [llms.txt](https://help.glpi-project.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.glpi-project.org/glpi-12/management/clusters.md).
# Clusters
A GLPI cluster is a grouping of several assets, which can be computers or network equipments.
## Description of specific fields
* **UUID**: Unique identifier of the cluster
* **Version**: In the case of a software cluster, the version number can be entered
* **Update Source**: How the cluster's data were updated
***
## Impact Analysis
Impact analysis enables an infrastructure diagram to be drawn up, showing the dependencies and impacts in the event of equipment loss. This can be saved and exported.
Go to Impact Analysis
***
## Items
This tab displays the GLPI items linked to this budget, as well as their value.
Go to Items
***
## Network Ports
This tab allows to manage the network ports attached to an equipment. The information that can be viewed is:
* Name
* Port number
* MTU
* Speed
* Internal status
* Last change
* Number of I/O bytes
* Number of I/O errors
* Duplex
* VLAN
* Connected to
* Connection
* Deleted
Go to Network ports
***
## Contracts
GLPI supports contracts management, in order to manage contract types such as loan, maintenance, support...
Contracts management allows to:
* make an inventory of all contracts related to the organization assets
* integrate contracts in GLPI financial management
* anticipate and follow contract renewal.
* Documents
The [document](/glpi-12/management/documents.md) tab lets you link different types of file to a material (PDF, txt, png, etc.) You can attach a document already uploaded to GLPI or add a new one directly from this tab.
Go to Contacts
***
## Documents
The document tab lets you link different types of file to a material (PDF, txt, png, etc.) You can attach a document already uploaded to GLPI or add a new one directly from this tab.
Go to Documents
***
## Tickets
View all tickets linked to the item.
Go to Tickets
***
## Problems
This tab refers to all hardware-related problems. Problems can also be linked to tickets, projects, etc. This allows you to have a complete scenario when necessary.
Go to Problems
***
## Changes
Changes lists all changes related to a material. From this tab, you can't link a change directly, you can do it from **`Assistance`** > **`Changes`** > **`Items`**. You can create a new change from this page, which will be linked to the material you have selected.
Go to Changes
***
## Links
Links offer several possibilities. Send the GLPI object file to another URL of your choice, or generate an RDP file, for example.
Go to Links
***
## Appliances
Appliances includes all business applications managed within GLPI. They can be linked to another GLPI object (computer, application, etc.) as well as to another appliance.
Go to Appliances
***
## History
The *History* tab is used to show any changes made to an item. The following information about the changes is available:
* ID of the change.
* Date and time the change was made.
* User who made the change. If this field is not filled, it means that the action was done automatically (For example: automatic inventory update).
* Field that was changed.
* Description of the change that was made.
The description of the change represents either the difference between the old and the new value (For example with location field: Change HQ to Remote Office A), or the explanation of the action which was carried out (For example: Uninstallation of a software: "Gimp 2.0").
{% hint style="info" %}
For dropdowns or objects with a parent/child relationship, the modification of a child will appear in the history of the parent element.
{% endhint %}
***
## All Information
For an item, all information is displayed on one page from the *All* tab. This shows all of the tabs of an object's form in one view, one below the other.
---
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