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Configuring Junos OS on the ACX500 Router

 

The ACX500 routers are shipped with Junos OS preinstalled and ready to be configured when the router is powered on. One 4-GB internal NAND flash memory device is divided into two partitions (da0s1 and da0s2). One partition is marked as the active partition, and the other partition functions as an alternate partition. The NAND flash device acts as the hard drive. One USB port on the front panel accepts a USB storage device (usb0) that can also function as an alternate boot device.

When the router boots, it first attempts to start the image on the USB flash memory device. If a USB flash memory device is not inserted into the router or the attempt otherwise fails, the router next tries the active partition on the NAND flash device, and then tries the alternate partition on the NAND flash device.

You configure the router by issuing Junos OS command-line interface (CLI) commands, either on a console device attached to the CONSOLE port on the front panel, or over a telnet connection to a network connected to the Routing Engine MGMT port on the front panel.

Gather the following information before configuring the router:

  • Name that the router will use on the network

  • Domain name that the router will use

  • IP address and prefix length information for the Ethernet interface

  • IP address of a default router

  • IP address of a DNS server

  • Password for the root user

This procedure connects the router to the network but does not enable it to forward traffic. For complete information about enabling the router to forward traffic, including examples, see the Junos OS configuration guides.

To configure the software:

  1. Verify that the router is powered on.
  2. Log in as the “root” user. There is no password.
  3. Start the CLI.
  4. Enter configuration mode.
  5. Configure the name of the router. If the name includes spaces, enclose the name in quotation marks (“ ”).
  6. Create a management console user account.
  7. Set the user account class to super-user.
  8. Configure the router’s domain name.
  9. Configure the IP address and prefix length for the router’s Ethernet interface.
  10. Configure the IP address of a backup router, which is used only while the routing protocol is not running.
  11. Configure the IP address of a DNS server.
  12. Set the root authentication password by entering either a clear-text password, an encrypted password, or an SSH public key string (DSA or RSA).

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  13. (Optional) Configure the static routes to remote subnets with access to the management port. Access to the management port is limited to the local subnet. To access the management port from a remote subnet, you need to add a static route to that subnet within the routing table. For more information about static routes, see the Junos OS Administration Library.
  14. Configure the telnet service at the [edit system services] hierarchy level.
  15. (Optional) Display the configuration to verify that it is correct.
  16. Commit the configuration to activate it on the router.
  17. (Optional) Configure additional properties by adding the necessary configuration statements. Then commit the changes to activate them on the router.
  18. When you have finished configuring the router, exit configuration mode.