Search for	Example	Results
A single word	`cat`	Topics that contain the word "cat". You will also find its grammatical variations, such as "cats".
A phrase. You can specify that the search results contain a specific phrase.	`"cat food"` (quotation marks)	Topics that contain the literal phrase "cat food" and all its grammatical variations. Without the quotation marks, the query is equivalent to specifying an OR operator, which finds topics with one of the individual words instead of the phrase.

Search for	Operator	Example
Two or more words in the same topic	`AND` `and` `+` (plus symbol) `&` (ampersand)	`cat AND dog` `"cat food"+milk` `"cat food"&"dog food"`
Either word in a topic	`OR` `or` `\|` (pipe)	`cat OR dog` `cat \| dog`
Topics that do not contain a specific word or phrase	`NOT` `not` `!` (exclamation point)	`NOT cat` `! dog`
Topics that contain one string and do not contain another	`^` (caret)	`cat ^ mouse`
A combination of search types	`( )` parentheses	`cat + (dog \| mouse)` `cat \| dog + (! mouse)`

Server Automation10.51

Get started > Key concepts > Architecture > SA gateways

SA gateways

SA gateways manage communication between Managed Servers and a SA Core, between multiple cores (Multimaster Mesh), and between Satellite installations and an SA Core. Multimaster installations are discussed in Multimaster Mesh (Multiple Cores) and Satellite installations are discussed in SA Satellites.

There are several types of gateways:

Management Gateway
This gateway manages communication between SA Cores and between SA Cores and Satellites.

Core Gateway/Agent Gateway
These gateways work together to facilitate communication between the SA Core and SA Agents on managed servers.

Satellite Gateway
This gateway communicates with the Core through the Management Gateway or the Core Gateway depending on your configuration.

Multimaster Master Gateway backup routes

By default, installation of a third or subsequent core in a Multimaster Mesh automatically creates a backup route to the Second Core providing a primary route to the First Core and a backup route to the Second Core. SA creates the Gateway backup routes automatically during installation, you are not required to provide any configuration information, however, if SA cannot create the backup routes, you will see a message to that effect and may need to contact HPE Technical Support to manually configure Gateway backup routes.

Gateway backup routes are created only during fresh installations of SA10.51, not during upgrades. If you are upgrading to SA10.51 from an earlier version, the upgrade will not create gateway backup routes. You must create backup routes manually. Contact your HPE Technical Support representative for more information.

For example, for a three core or more mesh, all Multimaster traffic is routed by default through the First Core’s Master Gateway. However, the Second Core’s Master Gateway is now designated by default as the backup Master Gateway should the First Core’s Master Gateway fail. All additional subsequent core’s Master Gateways added to the mesh will be designated as a backups in the order of installation. On installation, the third and subsequent cores will by default have two tunnels. The first tunnel communicates with the First Core’s Master Gateway, the second tunnel with the second core in the mesh (see the following figure).

A mesh with multiple Master Gateways will also have redundant backup routes (see the following figure).

Upon failure of a Master Gateway, the backup route will automatically be used for Multimaster Mesh traffic by default. When the failed Master Gateway is brought back on line, mesh traffic will automatically be routed through that gateway again.

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