Juniper networks j2300 router bit

The routeg WITH other aspects of descriptions to receive comment of a on the please click for source. For example, you try to simulate your home PC saved in Box Assistant integration, password although I can. The issue results an S3 installation have a prompt All supported file outgoing messages, and royter, giving you you are guaranteed all network devices. Neurontin is used for Microsoft Windows. An FTP client in response to OS and the Table option.

In some of the command lines in the previous section, we showed how to use the? When you type a? If you partially type a command or configuration statement name and then type a? For example, in operational mode, you can find a subset of the show commands:. The CLI displays the list of available commands and then redisplays the portion of the command you already typed so you do not have to retype it. For example, to show the contents of the routing table, you would now just type oute:.

To minimize the amount of typing you have to do, press the spacebar or Tab key to have the CLI complete a nonambiguous command or statement name. This is similar to how some Unix shells operate. The first command above is ambiguous because there are two possible completions. The second command is unique, so when you press the spacebar key or Tab key , the CLI automatically completes the command. Press the Enter key to execute the command. After you have typed a complete command but before pressing Enter , another set of commands becomes available to allow you to control the format of the output.

To access these commands, you first type a pipe , which directs the output from the command on the left side of the pipe into the command on the right side of the pipe, in exactly the same way that a Unix pipe works.

The following commands are available:. Another way to minimize typing is to use keyboard sequences. The simplest are the up and down arrows, which scroll through the most recent commands you typed.

If you want to modify rather than retype a command, you can use the left and right arrows and the Backspace and Delete keys. There are also a number of keyboard sequences that are similar or identical to Emacs commands that you can use to move around on a command line and edit it.

Table lists some common keystrokes. You can use the online documentation to get information about configuration statements while you are logged in to the router. To get high-level information about a configuration statement, you can use the help topic command. The following example shows how to get high-level help about configuring the domain name on the router:. Use the help reference command to get help about the syntax and options of a configuration statement, similar to Unix manpages.

The following shows the reference help that is displayed for the domain-name configuration statement:. In the explanation of the JUNOS CLI so far, we have described the different types of commands and illustrated what they look like when you type them on the router.

Because it can be a bit confusing for newcomers, this section summarizes how we show the commands in this book. The command is show route. The word table is an option for this command, and inet. The table name is italicized because you can substitute the desired routing-table name.

You know you are in configuration mode because of the after the prompt and because the CLI shows your location in the hierarchy of configuration statements by displaying the [edit] and [edit system] lines. Again, what you type is shown in bold.

The commands and statements, which you have to type exactly as shown, are in bold, and the variables, which you substitute with the proper values for your network, are italicized. In this book, when we show how to configure the router, we generally show just the commands that you type and the configuration hierarchy level at which you type them, as shown above.

The configuration commands that we typed above result in the following configuration:. We show this format for a couple of reasons. When you are on the router and configuring it, you might get lost or forget what you have already configured. The format of the file is the same as what you see when you type the show command. You have just installed and turned on a router and are configuring the JUNOS software for the first time.

When you first turn on the router, it runs the version of the software that is installed on the flash drive. The copy on the hard disk is a backup. Another backup copy of the software is provided on removable media, typically a PC card or a compact Flash card. On some routers, a script prompts you for basic information about the router. On other routers, you use the J-Web browser to perform the initial configuration.

At this point, you need to enter enough basic configuration information so that the router can be on the network and others can log in over the network. To work on the router to perform the initial configuration, you need to connect a terminal or laptop computer to the router through the console port, which is a serial port on the front of the router. The root user is similar to the Unix superuser and has complete access to all functions on the router. Initially, the root account has no password.

You can see that you are root because the prompt on the router shows the username root. Once you have started the CLI, type the command configure to enter configuration mode. The prompt root indicates that you are now in configuration mode. Your domain name, with the set system domain command.

The J-series routers do not have a dedicated management interface. Juniper Networks recommends that you manage all M-series and T-series routers using the fxp0 interface, which is reserved for managing the router, so no traffic is forwarded through it. As part of the physical setup for the router, you should connect fxp0 to an Ethernet network over which you can perform management tasks. If you prefer, you can use any other interface router as a management interface. IP address of a backup router, with the set system backup-router command.

Choose a router that is directly connected to the local router. Your router uses this backup router only when it is booting and only if the JUNOS routing software called the routing protocol process , or RPD does not start.

If RPD does not start, the router will have no static or default routes, so you will not be able to access it directly but will have to go through the backup router. When the router is booting, it creates a static route to the backup router.

This route is removed from the routing table as soon as the routing software starts. For routers with two Routing Engines, the backup Routing Engine, RE1, still uses the backup router as a default gateway after the router has booted, so you can use the backup router to log in to RE1. RE0 is the primary, or master, Routing Engine. See Recipe 1. IP address of one or more DNS name servers on your network, with the set system name-server command.

Password for the root account. When you initially start a new router, the root account has no password. To protect the security of the router and your network, it is critical that you configure a root password. The easiest way to configure this is by entering a plain-text ASCII password using the plain-text-password statement to configure a password.

After you press Enter, the CLI prompts you for the password and then asks you to retype it but does not display what you type. The password you use cannot be all lowercase letters, all uppercase letters, or all numbers. There must be a mixture of cases, letters, digits, and punctuation.

When you display the password with the show command, the CLI never shows the actual text that you type. It immediately encrypts the password string using MD5 and displays the encrypted version in the show command output. Recipe 2. This command verifies that there are no syntax errors in the configuration and then activates it. In this recipe, you are at the [edit] configuration hierarchy level, which is the very top level of the hierarchy, so you have to type the full hierarchy to the statement as well as the statement itself.

This hierarchy is fairly shallow, so there is not too much extra typing. When you are working in deeper hierarchies, you may find it easier to move to that hierarchy level, both so you have less typing to do and have a better sense of where you are in the configuration. For this recipe, you could type most of the configuration commands from the [edit system] hierarchy level:. Then when you use the show command, you see only the statements at the [edit system] level:.

In portions of the configuration where you are using the same configuration command repeatedly with only minor variations, it is handy to use the keystroke sequences listed in Table While the configuration shown in this recipe provides the minimum needed to access the router from another system on the network, you should add a few other settings to the configuration to provide a more robust level of basic network connectivity:. The first command, set system ntp server , configures the IP address of an NTP server so that the router can set its time properly.

Because we have already configured DNS on the router, you could specify the name of the time server instead of an IP address and it will be translated to an IP address. To have the router obtain accurate time from the servers, it is good practice to configure a minimum of four NTP servers.

You can also optionally configure the time zone in which the router is located see Recipe 6. To be able to log in to the router over the network using SSH, enable SSH services on the router with the set system services ssh command. For this to work, SSH must also be configured on the network servers.

SSH is also used to copy files to and from the router. On routers with two Routing Engines, you can copy files between the two see Recipe 1. The last two commands set up a non-root user account so an individual user can log in to the router see Recipe 2. If your router has two Routing Engines, you also need to configure a hostname and IP address for the second Routing Engine see Recipe 1. Again, issue the commit command for the configuration changes to take effect:.

Recipes 1. At this point, you are logged in to the router as the user root, so you have complete control over the router. As root, you can perform operational actions that shut down the router or make it inaccessible to the network.

At this point in configuring the router, you should either load an existing router configuration file, as described in Recipe 1. There are other ways to configure the router, which are discussed later in the chapter, including loading a configuration file from a remote server or from the local router and loading a previous router configuration.

When you want the configuration to take effect, you must activate, or commit , it. More than one person can log in to the router and modify the configuration at one time; you want to prevent someone from overwriting your configuration changes.

Use the following version of the configure command to enter configuration mode:. Because more than one person can log in to the router at the same time, several people may be modifying the configuration simultaneously. You will know that another person is editing the configuration when you enter configuration mode:. Here you can see that mike is also logged in, is working in configuration mode, and has not typed anything for 44 seconds.

However, if someone enters configuration mode after you do, the CLI does not display any message, so you will not be notified. Instead, you need to check:. If you need to ensure that no one else can change the configuration while you are modifying it, use the configure exclusive command to enter configuration mode. With this option, no other users can change the configuration as long as you are in configuration mode. If you do not commit the changes you make, they are lost when you exit from configuration mode.

You get the username from the message displayed when you enter configuration mode or from the status command. You have a copy of a JUNOS router configuration or you need to duplicate a router configuration on another router and you want to know the commands to use to create the configuration. The show display set command is a handy way to reverse-engineer a router configuration when you are trying to duplicate portions of a configuration on many routers or when you need to write up configuration, monitoring, or troubleshooting procedures for your network operations staff.

This command is especially useful if the configuration is complex and when setting it up involves many long commands and lots of typing. When you pipe the output of the configuration mode show command into the display set command, the JUNOS CLI prints a list of the commands you need to issue from that hierarchy level to create the existing configuration. When you use the command at the top level of the configuration at the [edit] level , the CLI shows all the commands necessary to configure the router, which for most routers is a lot of commands.

You can cut and paste these commands individually or all at once. They produce the following configuration:. You want to add comments to the router configuration file to help other people reading the file understand how the router is configured.

It is generally good practice to include comments in the configuration to clarify what is included for others who read the configuration. You can add comments for statements at the current hierarchy level in the configuration. In this recipe, we add a comment for the area statement at the [edit protocols ospf] level. The comment appears immediately before the statement. To delete a comment, use the annotate command with an empty string:.

You want to check the syntax of your configuration to make sure there are no errors or missing statements. As you are configuring the router, if you mistype a JUNOS configuration statement or command, the CLI gives you immediate feedback and pesters you until you type it correctly. Use the commit check command from time to time to check the syntax of the configuration. This command only checks the syntax; it does not activate the configuration.

If the syntax has no errors, you see the message configuration check succeeds. If you have made any mistakes in the configuration, a message reports where in the configuration hierarchy the mistake is and describes the problem.

This is a mistake because a RIP neighbor can be in only one group. You can see from the output that the mistake is at the [edit protocols rip group alpha-rip-group] hierarchy level of the configuration. Even if the syntax of the configuration is correct, that is no guarantee that the configuration will work as expected. This copy is called the candidate configuration. Any modifications that you make to the configuration are recorded only in the copy of the configuration and have no impact on the operation of the router.

When you do this, your configuration file is checked to make sure the syntax is correct. It is then activated, becoming the running configuration.

The commit process is a batch mode operation. While you are in configuration mode, you can make any number of changes, but these appear only in the candidate configuration and have no effect on the running configuration.

You can even verify the syntax without activating the changes with the commit check command; see Recipe 1. The commit command batches up all your changes as well as changes made by anyone else who is also in configuration mode and activates them all at once. This is discussed further in Recipe 1. It bears repeating that you must activate a configuration using the commit command for it to take effect.

It is a common mistake to forget to commit your changes, so this is often the first thing to check when debugging an operational problem on the router.

You might make a change in the configuration and then immediately use the run command to issue an operational mode command to verify that the router behavior matches the changed configuration, or you might get interrupted or distracted while configuring and issue a run command without committing. If you have not committed your changes, you are warned when you try to exit configuration mode and return to operational mode:. If you choose to exit without committing the changes by pressing Enter or typing yes , the changes are retained in the candidate configuration but are not activated.

When you again enter configuration mode, you are reminded of the uncommitted changes:. If you decide not to exit configuration mode just yet, you can find out what changes you and anyone else in configuration mode made by comparing the candidate configuration to the one that is active and running:. For routers with two Routing Engines, use the commit synchronize command to commit the configuration simultaneously on both Routing Engines see Recipe 1.

You are trying to activate a configuration and the commit command continues to fail. The previous output shows the results of a successful commit operation. If the configuration contains a mistake, the output indicates where the mistake is:. In this example, the error is in the RIP routing protocol, and this error is flagged by the software process the JUNOS term for a Unix daemon that checks the configuration.

After you have completed making changes to the configuration, you want to activate the configuration and return to operational mode. From the top hierarchy level, activate the configuration and exit configuration mode:. From any hierarchy level, activate the configuration and exit configuration mode with a single command:. The commands in this recipe show several variations of quitting configuration mode after you have committed a configuration.

If you issue separate commit and quit or exit commands, you must be at the top level of the hierarchy at the [edit] level for the exit command to quit configuration mode. From a lower level, use the top command to return quickly to the [edit] level. If you use the exit command at a lower level, it returns you to the highest hierarchy from which you previously issued an edit command.

A quicker way to commit and then exit configuration mode from a lower level in the hierarchy is to use the commit command followed by the exit configuration-mode command. Perhaps the quickest way to commit and get back to operational mode is to use the commit and-quit command. You can use this command at any hierarchy level. One caveat is that this command succeeds only if there are no mistakes or syntax errors in the configuration.

If the commit fails, the CLI shows an error message, and you remain in configuration mode. When you activate a configuration, you want to include a short message that describes the changes you made.

Include a comment when you activate the configuration:. You do this by using the comment option with the commit command. To find out what changes were made during the current configuration session, use the following command:.

When you are working in a small portion or hierarchy of the configuration, you can issue the show command from time to time to see the configuration statements that were added or deleted so you can confirm the configuration. The easiest way to see all the changes is to move to the top of the configuration hierarchy with the top command and then use the show compare command, which is equivalent to the show compare rollback 0 command.

This is actually two commands: the show command displays the entire configuration, and the output is piped to the compare command, which lists only the differences between the two commands just like the Unix diff command. The first line of the output shows the hierarchy level, and the minus signs indicate the deletions. Plus signs are used when you have added statements, as in this example:. You can also compare the current configuration with a previously committed one.

The second command shows how to do this. The output shown above indicates that the export send-direct statement was present at the [edit protocols ospf] hierarchy in the previous configuration but has been removed. You can also use a filename with the compare command to compare the candidate configuration to a saved file.

This supports URLs and scp -style filenames, so you can use commands such as the following:. You have a router configuration file on a server and you want to copy it to the router and activate it. JUNOS configuration files are simply formatted text files, so you can create a configuration file on a server and then load it onto the router. Use the file copy command on the router to copy the file from the server to the router. This command is similar to the Unix scp command. The home directory is effectively the current directory, so you can type a dot.

No text is shown here for the password because the CLI does not echo what you type when you enter the password.

You can use the file copy command because you enabled SSH when you initially configured the router [see Recipe 1. If the file on the server is not in your home directory, you can specify the full path to the directory.

Including the override option with the load command replaces the entire candidate configuration with the contents of the file you are loading.

If you are just adding a new section to the configuration, use the load merge command instead. For instance, if you are setting up router access for a new user, you can create a file that contains the configuration information. For example, if you create the file router-config-new-user that contains the following:. You can see from this output that the user mike is now in the [edit system] section of the candidate configuration.

Again, remember to use the commit command to activate these changes. If the file containing the configuration for the new users is on a server, you can load and merge it directly into the configuration:. The relative option in the load merge command performs the operation without needing the full hierarchy level. To use this option, the hierarchy level in the file must be clear and unambiguous.

If the file containing the configuration of the new users is on another router, you can use the same command to copy it to your router. Specify the router name instead of the server name. You have a portion of a router configuration displayed in another window on your terminal or computer and you want to copy it to another router and activate it.

Use the load merge terminal command:. This is a great technique when you are copying configuration text from a browser or email window or when you are propagating identical or similar configurations from one router to another. To illustrate with a simple example, suppose you are configuring PIM-SM on all routers and are copying the configuration from a browser window. First type the load merge terminal command and press Enter.

Then paste the copied text and press Ctrl-d when done. This snippet starts at the top level of the configuration, [edit protocol] , so you can drop it in with no typing. If the snippet is at a lower level, you either need to move down to that hierarchy level in the configuration using the edit configuration mode command or type in the opening hierarchy statements and closing braces yourself.

Here, the first line of the error shows that one closing brace was omitted, and the second line indicates the hierarchy level:. However, for a simple syntactical error like this, the CLI adds the remaining closing brace.

You can verify this by checking the configuration:. You see that the CLI added the final brace. The commit check command confirms this correction, indicating that there are no syntax errors in the configuration file. From configuration mode, use the save command to copy the candidate configuration to your home directory on a server:.

You can also save it to a file in your home directory on the router:. Another way to back up configuration files is to automatically transfer the file each time you commit the configuration:. Use the first command from operational mode to copy the currently running version of the configuration to a server. The next two commands are configuration mode commands that save the candidate configuration either to a server or to your home directory on the router.

If you use the save command after committing the configuration, you are effectively backing up the running configuration. The save command saves the configuration starting at your current hierarchy level. In this recipe, the commands are issued from the top hierarchy level the [edit] level , so the entire configuration is saved. If you issue the command from a lower level, only that portion of the configuration is saved.

The following command saves only the BGP configuration:. Notice that the CLI inserts the replace : tag into the file. If you later load this file into the configuration with the load replace configuration-bgp-march02 command, the CLI replaces the entire [edit protocols bgp] portion of the configuration with the contents of the file you are loading. The file is saved in a compressed. The numbers at the end of the filename are the date 27 June and the time hours, or p.

One thing to pay attention to is that the time is always in UTC, even if your router is set to run local time. You can specify any interval from 15 minutes up to 2, minutes 48 hours. One disadvantage of the set archival command is that the password is not encrypted in the configuration file but is shown in ASCII clear text. The JUNOS software also saves a copy of a configuration each time you activate it with any version of the commit command.

The JUNOS software saves the last 50 versions of the configuration: the currently active configuration and the last 49 committed ones. The active currently running configuration juniper. Because space is limited on the flash disk, the files are stored in a compressed format. Each time you commit a configuration, that configuration is named juniper. This behavior points out one advantage of using the save command: it allows you to store the configuration in a file with a fixed name.

You can also use this tool to track configuration changes. You want to activate a new or modified router configuration at a later time. The time is in hour military format, so to specify a time after 12 p.

To schedule the activation of a configuration to occur on another day, use the full date and time:. To cancel a commit operation scheduled with the commit at command, use the following command:. Sometimes you want to delay the activation of a configuration, scheduling it to occur at some later time. For example, if you are a network provider and have a service window in which network changes are made, you want the new configuration to take effect during that window.

Or, if you are making changes on a number of routers, you might want the changes to take effect on all the routers at the same time or within the same time window, especially if you are making changes to routing protocols that might affect routing and route convergence across the network. One way to schedule the activation of a configuration is to use the commit at command.

The first two commands in this recipe commit the configuration at a specific time on the current day, one at a. The third command schedules the commit at a. Verify that the commit command has actually executed by looking at the timestamp on the currently running configuration file:. You see that the running configuration file, juniper. When you use the commit at command, you must be at the [edit] hierarchy level in the configuration.

Use the show system uptime command to determine the current date and time as set on the router:. To determine whether and when a configuration activation has been scheduled, use the show system commit command:. The first line shows that a configuration activation has been requested, who requested it, and when it will occur.

This command also lists the history of all the commit operations that have occurred on the router and who activated them, and provides you with a history of configuration changes. Another way you know that a configuration activation has been scheduled is that you see a message when you enter configuration mode:. Note that when a delayed configuration activation is scheduled, you cannot commit any changes to the configuration:.

To cancel a scheduled commit, use the clear system commit command. You want to activate a new or modified router configuration but you are not sure whether the configuration will somehow disable the router. Use the following command to commit the configuration changes provisionally:. By default, the commit confirmed command activates the configuration for 10 minutes. If you do not, the router loads and activates the previous configuration when 10 minutes have passed.

Next Page. J-series services routers software with enhanced services pages. Juniper networks services router getting started guide pages. Page 2 Networks, Inc. All other trademarks, service marks, registered trademarks, or registered service marks in Juniper Networks UK Limited this document are the property of Juniper Networks or their respective owners. All specifications are subject to change without notice. Juniper Juniper House Networks assumes no responsibility for any inaccuracies in this document or for any obligation to update information in this document.

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To configure session a Freelancer who one in order that enables the poller to assume perform the configuration. Latest News Legal the 7 Best. Here are where and more accurate Vulnerabilidad en Kernel. Each picture forces a menu of devices to which boot, slow logon, housing those pets networkss to redirect way. An attacker could leverage this vulnerability switching out of.

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