Microsoft Azure

Route Table

Azure Route Table is a networking service that allows users to control and manage the routing of network traffic within their virtual networks. It provides a way to specify which virtual network subnets, internet-facing virtual appliances, and virtual machines should route network traffic. Azure Route Tables consist of a collection of rules, called routes, that specify the path that network traffic should take. These routes can be added, removed, or modified as needed. Each route consists of a destination prefix, a next hop type, and a next hop address.‍

Costs

Direct Cost

Indirect Cost

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Terraform Name

azurerm_route_table

Route Table

attributes:

The following arguments are supported:

name - (Required) The name of the route table. Changing this forces a new resource to be created.
resource_group_name - (Required) The name of the resource group in which to create the route table. Changing this forces a new resource to be created.
location - (Required) Specifies the supported Azure location where the resource exists. Changing this forces a new resource to be created.
route - (Optional) List of objects representing routes. Each object accepts the arguments documented below.

NOTE

Since route can be configured both inline and via the separate azurerm_route resource, we have to explicitly set it to empty slice ([]) to remove it.

disable_bgp_route_propagation - (Optional) Boolean flag which controls propagation of routes learned by BGP on that route table. True means disable.
tags - (Optional) A mapping of tags to assign to the resource.

A route block support:

name - (Required) The name of the route.
address_prefix - (Required) The destination to which the route applies. Can be CIDR (such as 10.1.0.0/16) or Azure Service Tag (such as ApiManagement, AzureBackup or AzureMonitor) format.
next_hop_type - (Required) The type of Azure hop the packet should be sent to. Possible values are VirtualNetworkGateway, VnetLocal, Internet, VirtualAppliance and None.
next_hop_in_ip_address - (Optional) Contains the IP address packets should be forwarded to. Next hop values are only allowed in routes where the next hop type is VirtualAppliance.

‍

Associating resources with a

Route Table

Resources do not "belong" to a

Route Table

Rather, one or more Security Groups are associated to a resource.

Create

Route Table

via Terraform:

The following HCL manages a route table

Syntax:

resource "azurerm_resource_group" "example" {
name = "example-resources"
location = "West Europe"
}

resource "azurerm_route_table" "example" {
name = "example-route-table"
location = azurerm_resource_group.example.location
resource_group_name = azurerm_resource_group.example.name
disable_bgp_route_propagation = false

route {
name = "route1"
address_prefix = "10.1.0.0/16"
next_hop_type = "VnetLocal"
}

tags = {
environment = "Production"
}
}

Create

Route Table

via CLI:

Parametres:

az network route-table route create --name
--resource-group
--route-table-name
[--address-prefix]
[--next-hop-ip-address]
[--next-hop-type {Internet, None, VirtualAppliance, VirtualNetworkGateway, VnetLocal}]
[--no-wait {0, 1, f, false, n, no, t, true, y, yes}]

Example:

az network route-table route create -g MyResourceGroup --route-table-name MyRouteTable -n MyRoute --next-hop-type VirtualAppliance --address-prefix 10.0.0.0/16 --next-hop-ip-address 10.0.100.4

Best Practices for

Route Table

Categorized by Availability, Security & Compliance and Cost

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