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7.4 KiB
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51 lines
7.4 KiB
ReStructuredText
:original_name: er_01_0040.html
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.. _er_01_0040:
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Route Overview
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==============
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What Is a Route?
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----------------
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Routes are used to forward packets. A route contains information such as the destination, next hop, and route type.
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You can create a propagation for attachments to automatically propagate routes to route tables or manually add static routes to route tables.
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.. _er_01_0040__fig2088721517588:
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.. figure:: /_static/images/en-us_image_0000001347809009.png
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:alt: **Figure 1** Propagated routes and static routes
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**Figure 1** Propagated routes and static routes
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.. table:: **Table 1** Route types
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+-------------------+-------------------------------------------------------------------------------------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
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| Route Type | Description | How to Create | Description |
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+===================+===========================================================================================================================================+===============================================================================================================+==============================================================================================================================================================================+
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| Propagated routes | Propagated routes are routes that attachments propagate to the route tables of the enterprise router. They cannot be modified or deleted. | To create a propagation, see :ref:`Creating a Propagation for an Attachment in the Route Table <er_01_0036>`. | Routes are classified into propagated routes and static routes. The routes shown in :ref:`Figure 1 <er_01_0040__fig2088721517588>` are described as follows: |
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| | | | - Propagated routes are from: |
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| | | | - Propagations automatically created in the default route table of the enterprise router for attachments, such as VPC 1, VPC 2, and virtual gateway 1 attachments. |
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| | | | - Propagations manually created in the custom route table of the enterprise router for attachments, such as VPC 1, virtual gateway 1, and virtual gateway 2 attachments. |
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| | | | - Static routes are manually added to the custom route table of the enterprise router for attachments, such as VPC 3 and VPC 4 attachments. |
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+-------------------+-------------------------------------------------------------------------------------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
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| Static routes | Static routes are manually created and can be modified or deleted. | To create a route, see :ref:`Creating a Static Route <er_01_0041>`. | |
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+-------------------+-------------------------------------------------------------------------------------------------------------------------------------------+---------------------------------------------------------------------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
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Route Priority
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--------------
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If there are multiple routes with the same destination but different targets in a route table, the route priority is as follows:
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Static route > propagated route for VPC attachment > propagated route for virtual gateway attachment route
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.. note::
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- Static routes are manually configured and the destination of each static route must be unique in a route table.
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- Propagated routes are automatically learned by the system and may have the same destination in a route table.
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- A static route and a propagated route may have the same destination in a route table.
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