To configure static routes on a Juniper SRX device, you’ll use the Junos OS CLI to define the desired routes. A static route manually specifies the path that network traffic should take to reach a specific destination. Below are the steps to configure static routes on a Juniper SRX device:

Step 1: Access the SRX Device

Log into the SRX device using SSH, console, or any other method you use to access the CLI.

Step 2: Enter Configuration Mode

Once logged in, enter configuration mode:

cli
configure

Step 3: Configure Static Routes

Static routes are configured in the routing-options section. There are two main types of static routes you can configure:

• Direct static route: A route pointing to a specific next-hop IP address or an exit interface.
• Default static route: A route that is used for any destination not explicitly listed in the routing table.

3.1 Direct Static Route

To configure a static route that points to a specific next-hop IP address:

set routing-options static route <destination_network> next-hop <next_hop_ip>

Where:

• <destination_network> is the destination IP network or subnet.
• <next_hop_ip> is the IP address of the next hop router or gateway.

Example:

To add a static route for network 192.168.100.0/24 with a next-hop IP address of 10.0.0.1, you would use:

set routing-options static route 192.168.100.0/24 next-hop 10.0.0.1

3.2 Static Route via an Interface

Alternatively, you can configure a static route that points to a specific outgoing interface (without specifying a next-hop IP). This is typically used in scenarios where the next-hop is directly connected to the specified interface.

set routing-options static route <destination_network> outgoing-interface <interface_name>

Where:

• <destination_network> is the destination IP network or subnet.
• <interface_name> is the name of the local interface (e.g., ge-0/0/0).

Example:

To add a static route for network 10.10.10.0/24 via the interface ge-0/0/1:

set routing-options static route 10.10.10.0/24 outgoing-interface ge-0/0/1

3.3 Default Route (Gateway of Last Resort)

To configure a default static route (also known as a "gateway of last resort"):

Example:

To configure a default route that points to 10.0.0.1 as the next-hop gateway:

xset routing-options static route 0.0.0.0/0 next-hop <next_hop_ip>

This tells the SRX device to send all traffic destined for networks not explicitly listed in the routing table to the IP address 10.0.0.1.

Step 4: Commit the Configuration

Once you've entered the static route configurations, commit the changes to apply them:

commit

Step 5: Verify the Static Routes

You can verify the static route configuration by using the following commands:

• Show the static route configuration:

  show configuration routing-options static
  

• Check the routing table to verify the static routes are installed:

  show route
  

• Check specific route details (including static routes):

  show route protocol static