.. _basic-commands: ************** Basic Commands ************** The following sections discuss commands common to all the routing daemons. .. _config-commands: Config Commands =============== In the config file, you can write the debugging options, a vty's password, routing daemon configurations, a log file name, and so forth. This information forms the initial command set for a routing beast as it is starting. .. _config-file: Integrated Config File ---------------------- FRR uses a single configuration file located in |INSTALL_PREFIX_ETC|/frr.conf. When FRR is started using an init script or ``systemd``, ``vtysh`` is invoked to read the config file and send the appropriate portions to only the daemons interested in them. Running configuration updates are persisted back to this single file using ``vtysh`` as well. .. include:: prior-config-files.rst .. _basic-config-commands: Basic Config Commands --------------------- .. clicmd:: hostname HOSTNAME Set hostname of the router. It is only for current ``vtysh``, it will not be saved to any configuration file even with ``write file``. .. clicmd:: domainname DOMAINNAME Set domainname of the router. It is only for current ``vtysh``, it will not be saved to any configuration file even with ``write file``. .. clicmd:: password PASSWORD Set password for vty interface. The ``no`` form of the command deletes the password. If there is no password, a vty won't accept connections. .. clicmd:: enable password PASSWORD Set enable password. The ``no`` form of the command deletes the enable password. .. clicmd:: service cputime-stats Collect CPU usage statistics for individual FRR event handlers and CLI commands. This is enabled by default and can be disabled if the extra overhead causes a noticeable slowdown on your system. Disabling these statistics will also make the :clicmd:`service cputime-warning (1-4294967295)` limit non-functional. .. clicmd:: service cputime-warning (1-4294967295) Warn if the CPU usage of an event handler or CLI command exceeds the specified limit (in milliseconds.) Such warnings are generally indicative of some routine in FRR mistakenly blocking/hogging the processing loop and should be reported as a FRR bug. This command has no effect if :clicmd:`service cputime-stats` is disabled. .. clicmd:: service walltime-warning (1-4294967295) Warn if the total wallclock time spent handling an event or executing a CLI command exceeds the specified limit (in milliseconds.) This includes time spent waiting for I/O or other tasks executing and may produce excessive warnings if the system is overloaded. (This may still be useful to provide an immediate sign that FRR is not operating correctly due to externally caused starvation.) .. clicmd:: log trap LEVEL These commands are deprecated and are present only for historical compatibility. The log trap command sets the current logging level for all enabled logging destinations, and it sets the default for all future logging commands that do not specify a level. The normal default logging level is debugging. The ``no`` form of the command resets the default level for future logging commands to debugging, but it does not change the logging level of existing logging destinations. .. clicmd:: log stdout LEVEL Enable logging output to stdout. If the optional second argument specifying the logging level is not present, the default logging level (typically debugging) will be used. The ``no`` form of the command disables logging to stdout. The ``LEVEL`` argument must have one of these values: emergencies, alerts, critical, errors, warnings, notifications, informational, or debugging. Note that the existing code logs its most important messages with severity ``errors``. .. note:: If ``systemd`` is in use and stdout is connected to systemd, FRR will automatically switch to ``journald`` extended logging for this target. .. warning:: FRRouting uses the ``writev()`` system call to write log messages. This call is supposed to be atomic, but in reality this does not hold for pipes or terminals, only regular files. This means that in rare cases, concurrent log messages from distinct threads may get jumbled in terminal output. Use a log file and ``tail -f`` if this rare chance is inacceptable to your setup. .. clicmd:: log file [FILENAME [LEVEL]] If you want to log into a file, please specify ``filename`` as in this example: :: log file /var/log/frr/bgpd.log informational If the optional second argument specifying the logging level is not present, the default logging level (typically debugging, but can be changed using the deprecated ``log trap`` command) will be used. The ``no`` form of the command disables logging to a file. .. clicmd:: log daemon DAEMON file [FILENAME [LEVEL]] Configure file logging for a single FRR daemon. If you want to log into a file, please specify ``filename`` as in this example: :: log daemon bgpd file /var/log/frr/bgpd.log informational If the optional second argument specifying the logging level is not present, the default logging level (typically debugging, but can be changed using the deprecated ``log trap`` command) will be used. The ``no`` form of the command disables logging to a file for a single FRR daemon. .. clicmd:: log syslog [LEVEL] Enable logging output to syslog. If the optional second argument specifying the logging level is not present, the default logging level (typically debugging, but can be changed using the deprecated ``log trap`` command) will be used. The ``no`` form of the command disables logging to syslog. .. note:: This uses the system's ``syslog()`` API, which does not support message batching or structured key/value data pairs. If possible, use :clicmd:`log extended EXTLOGNAME` with :clicmd:`destination syslog [supports-rfc5424]` instead of this. .. clicmd:: log extended EXTLOGNAME Create an extended logging target with the specified name. The name has no further meaning and is only used to identify the target. Multiple targets can be created and deleted with the ``no`` form. Refer to :ref:`ext-log-target` for further details and suboptions. .. clicmd:: log monitor [LEVEL] This command is deprecated and does nothing. .. clicmd:: log facility [FACILITY] This command changes the facility used in syslog messages. The default facility is ``daemon``. The ``no`` form of the command resets the facility to the default ``daemon`` facility. .. clicmd:: log record-priority To include the severity in all messages logged to a file, to stdout, or to a terminal monitor (i.e. anything except syslog), use the ``log record-priority`` global configuration command. To disable this option, use the ``no`` form of the command. By default, the severity level is not included in logged messages. Note: some versions of syslogd can be configured to include the facility and level in the messages emitted. .. clicmd:: log timestamp precision [(0-6)] This command sets the precision of log message timestamps to the given number of digits after the decimal point. Currently, the value must be in the range 0 to 6 (i.e. the maximum precision is microseconds). To restore the default behavior (1-second accuracy), use the ``no`` form of the command, or set the precision explicitly to 0. :: log timestamp precision 3 In this example, the precision is set to provide timestamps with millisecond accuracy. .. clicmd:: log commands This command enables the logging of all commands typed by a user to all enabled log destinations. The note that logging includes full command lines, including passwords. If the daemon startup option `--command-log-always` is used to start the daemon then this command is turned on by default and cannot be turned off and the [no] form of the command is disallowed. .. clicmd:: log filtered-file [FILENAME [LEVEL]] Configure a destination file for filtered logs with the :clicmd:`log filter-text WORD` command. .. clicmd:: log filter-text WORD This command forces logs to be filtered on a specific string. A log message will only be printed if it matches on one of the filters in the log-filter table. The filter only applies to file logging targets configured with :clicmd:`log filtered-file [FILENAME [LEVEL]]`. .. note:: Log filters help when you need to turn on debugs that cause significant load on the system (enabling certain debugs can bring FRR to a halt). Log filters prevent this but you should still expect a small performance hit due to filtering each of all those logs. .. note:: This setting is not saved to ``frr.conf`` and not shown in :clicmd:`show running-config`. It is intended for ephemeral debugging purposes only. .. clicmd:: clear log filter-text This command clears all current filters in the log-filter table. .. clicmd:: log immediate-mode Use unbuffered output for log and debug messages; normally there is some internal buffering. .. clicmd:: log unique-id Include ``[XXXXX-XXXXX]`` log message unique identifier in the textual part of log messages. This is enabled by default, but can be disabled with ``no log unique-id``. Please make sure the IDs are enabled when including logs for FRR bug reports. The unique identifiers are automatically generated based on source code file name, format string (before filling out) and severity. They do not change "randomly", but some cleanup work may cause large chunks of ID changes between releases. The IDs always start with a letter, consist of letters and numbers (and a dash for readability), are case insensitive, and ``I``, ``L``, ``O`` & ``U`` are excluded. This option will not affect future logging targets which allow putting the unique identifier in auxiliary metadata outside the log message text content. (No such logging target exists currently, but RFC5424 syslog and systemd's journald both support it.) .. clicmd:: debug unique-id XXXXX-XXXXX backtrace Print backtraces (call stack) for specific log messages, identified by their unique ID (see above.) Includes source code location and current event handler being executed. On some systems you may need to install a `debug symbols` package to get proper function names rather than raw code pointers. This command can be issued inside and outside configuration mode, and is saved to configuration only if it was given in configuration mode. .. warning:: Printing backtraces can significantly slow down logging calls and cause log files to quickly balloon in size. Remember to disable backtraces when they're no longer needed. .. clicmd:: debug routemap [detail] This command turns on debugging of routemaps. When detail is specified more data is provided to the operator about the reasoning about what is going on in the routemap code. .. clicmd:: service password-encryption Encrypt password. .. clicmd:: service advanced-vty Enable advanced mode VTY. .. clicmd:: service terminal-length (0-512) Set system wide line configuration. This configuration command applies to all VTY interfaces. .. clicmd:: line vty Enter vty configuration mode. .. clicmd:: banner motd default Set default motd string. .. clicmd:: banner motd file FILE Set motd string from file. The file must be in directory specified under ``--sysconfdir``. .. clicmd:: banner motd line LINE Set motd string from an input. .. clicmd:: exec-timeout MINUTE [SECOND] Set VTY connection timeout value. When only one argument is specified it is used for timeout value in minutes. Optional second argument is used for timeout value in seconds. Default timeout value is 10 minutes. When timeout value is zero, it means no timeout. Not setting this, or setting the values to 0 0, means a timeout will not be enabled. .. clicmd:: access-class ACCESS-LIST Restrict vty connections with an access list. .. clicmd:: allow-reserved-ranges Allow using IPv4 reserved (Class E) IP ranges for daemons. E.g.: setting IPv4 addresses for interfaces or allowing reserved ranges in BGP next-hops. If you need multiple FRR instances (or FRR + any other daemon) running in a single router and peering via 127.0.0.0/8, it's also possible to use this knob if turned on. Default: off. .. _sample-config-file: Sample Config File ------------------ Below is a sample configuration file for the zebra daemon. .. code-block:: frr ! ! Zebra configuration file ! frr version 6.0 frr defaults traditional ! hostname Router password zebra enable password zebra ! log stdout ! ! ``!`` and ``#`` are comment characters. If the first character of the word is one of the comment characters then from the rest of the line forward will be ignored as a comment. .. code-block:: frr password zebra!password If a comment character is not the first character of the word, it's a normal character. So in the above example ``!`` will not be regarded as a comment and the password is set to ``zebra!password``. Configuration versioning, profiles and upgrade behavior ------------------------------------------------------- All |PACKAGE_NAME| daemons share a mechanism to specify a configuration profile and version for loading and saving configuration. Specific configuration settings take different default values depending on the selected profile and version. While the profile can be selected by user configuration and will remain over upgrades, |PACKAGE_NAME| will always write configurations using its current version. This means that, after upgrading, a ``write file`` may write out a slightly different configuration than what was read in. Since the previous configuration is loaded with its version's defaults, but the new configuration is written with the new defaults, any default that changed between versions will result in an appropriate configuration entry being written out. **FRRouting configuration is sticky, staying consistent over upgrades.** Changed defaults will only affect new configuration. Note that the loaded version persists into interactive configuration sessions. Commands executed in an interactive configuration session are no different from configuration loaded at startup. This means that when, say, you configure a new BGP peer, the defaults used for configuration are the ones selected by the last ``frr version`` command. .. warning:: Saving the configuration does not bump the daemons forward to use the new version for their defaults, but restarting them will, since they will then apply the new ``frr version`` command that was written out. Manually execute the ``frr version`` command in ``show running-config`` to avoid this intermediate state. This is visible in ``show running-config``: .. code-block:: frr Current configuration: ! ! loaded from 6.0 frr version 6.1-dev frr defaults traditional ! If you save and then restart with this configuration, the old defaults will no longer apply. Similarly, you could execute ``frr version 6.1-dev``, causing the new defaults to apply and the ``loaded from 6.0`` comment to disappear. Profiles ^^^^^^^^ |PACKAGE_NAME| provides configuration profiles to adapt its default settings to various usage scenarios. Currently, the following profiles are implemented: * ``traditional`` - reflects defaults adhering mostly to IETF standards or common practices in wide-area internet routing. * ``datacenter`` - reflects a single administrative domain with intradomain links using aggressive timers. Your distribution/installation may pre-set a profile through the ``-F`` command line option on all daemons. All daemons must be configured for the same profile. The value specified on the command line is only a pre-set and any ``frr defaults`` statement in the configuration will take precedence. .. note:: The profile must be the same across all daemons. Mismatches may result in undefined behavior. You can freely switch between profiles without causing any interruption or configuration changes. All settings remain at their previous values, and ``show running-configuration`` output will have new output listing the previous default values as explicit configuration. New configuration, e.g. adding a BGP peer, will use the new defaults. To apply the new defaults for existing configuration, the previously-invisible old defaults that are now shown must be removed from the configuration. Upgrade practices for interactive configuration ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ If you configure |PACKAGE_NAME| interactively and use the configuration writing functionality to make changes persistent, the following recommendations apply in regards to upgrades: 1. Skipping major versions should generally work but is still inadvisable. To avoid unneeded issue, upgrade one major version at a time and write out the configuration after each update. 2. After installing a new |PACKAGE_NAME| version, check the configuration for differences against your old configuration. If any defaults changed that affect your setup, lines may appear or disappear. If a new line appears, it was previously the default (or not supported) and is now necessary to retain previous behavior. If a line disappears, it previously wasn't the default, but now is, so it is no longer necessary. 3. Check the log files for deprecation warnings by using ``grep -i deprecat``. 4. After completing each upgrade, save the configuration and either restart |PACKAGE_NAME| or execute ``frr version `` to ensure defaults of the new version are fully applied. Upgrade practices for autogenerated configuration ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ When using |PACKAGE_NAME| with generated configurations (e.g. Ansible, Puppet, etc.), upgrade considerations differ somewhat: 1. Always write out a ``frr version`` statement in the configurations you generate. This ensures that defaults are applied consistently. 2. Try to not run more distinct versions of |PACKAGE_NAME| than necessary. Each version may need to be checked individually. If running a mix of older and newer installations, use the oldest version for the ``frr version`` statement. 3. When rolling out upgrades, generate a configuration as usual with the old version identifier and load it. Check for any differences or deprecation warnings. If there are differences in the configuration, propagate these back to the configuration generator to minimize relying on actual default values. 4. After the last installation of an old version is removed, change the configuration generation to a newer ``frr version`` as appropriate. Perform the same checks as when rolling out upgrades. .. _terminal-mode-commands: Terminal Mode Commands ====================== .. clicmd:: write terminal Displays the current configuration to the vty interface. .. clicmd:: write file Write current configuration to configuration file. .. clicmd:: configure [terminal] Change to configuration mode. This command is the first step to configuration. .. clicmd:: terminal length (0-512) Set terminal display length to ``(0-512)``. If length is 0, no display control is performed. .. clicmd:: who Show a list of currently connected vty sessions. .. clicmd:: list List all available commands. .. clicmd:: show version Show the current version of |PACKAGE_NAME| and its build host information. .. clicmd:: show logging Shows the current configuration of the logging system. This includes the status of all logging destinations. .. clicmd:: show log-filter Shows the current log filters applied to each daemon. .. clicmd:: show memory [DAEMON] Show information on how much memory is used for which specific things in |PACKAGE_NAME|. Output may vary depending on system capabilities but will generally look something like this: :: frr# show memory System allocator statistics: Total heap allocated: 1584 KiB Holding block headers: 0 bytes Used small blocks: 0 bytes Used ordinary blocks: 1484 KiB Free small blocks: 2096 bytes Free ordinary blocks: 100 KiB Ordinary blocks: 2 Small blocks: 60 Holding blocks: 0 (see system documentation for 'mallinfo' for meaning) --- qmem libfrr --- Buffer : 3 24 72 Buffer data : 1 4120 4120 Host config : 3 (variably sized) 72 Command Tokens : 3427 72 247160 Command Token Text : 2555 (variably sized) 83720 Command Token Help : 2555 (variably sized) 61720 Command Argument : 2 (variably sized) 48 Command Argument Name : 641 (variably sized) 15672 [...] --- qmem Label Manager --- --- qmem zebra --- ZEBRA VRF : 1 912 920 Route Entry : 11 80 968 Static route : 1 192 200 RIB destination : 8 48 448 RIB table info : 4 16 96 Nexthop tracking object : 1 200 200 Zebra Name Space : 1 312 312 --- qmem Table Manager --- To understand system allocator statistics, refer to your system's :manpage:`mallinfo(3)` man page. Below these statistics, statistics on individual memory allocation types in |PACKAGE_NAME| (so-called `MTYPEs`) is printed: * the first column of numbers is the current count of allocations made for the type (the number decreases when items are freed.) * the second column is the size of each item. This is only available if allocations on a type are always made with the same size. * the third column is the total amount of memory allocated for the particular type, including padding applied by malloc. This means that the number may be larger than the first column multiplied by the second. Overhead incurred by malloc's bookkeeping is not included in this, and the column may be missing if system support is not available. When executing this command from ``vtysh``, each of the daemons' memory usage is printed sequentially. You can specify the daemon's name to print only its memory usage. .. clicmd:: show motd Show current motd banner. .. clicmd:: show history Dump the vtysh cli history. .. clicmd:: logmsg LEVEL MESSAGE Send a message to all logging destinations that are enabled for messages of the given severity. .. clicmd:: find REGEX... This command performs a regex search across all defined commands in all modes. As an example, suppose you're in enable mode and can't remember where the command to turn OSPF segment routing on is: :: frr# find segment-routing on (ospf) segment-routing on (isis) segment-routing on The CLI mode is displayed next to each command. In this example, :clicmd:`segment-routing on` is under the `router ospf` mode. Similarly, suppose you want a listing of all commands that contain "l2vpn" and "neighbor": :: frr# find l2vpn.*neighbor (view) show [ip] bgp l2vpn evpn neighbors advertised-routes [json] (view) show [ip] bgp l2vpn evpn neighbors routes [json] (view) show [ip] bgp l2vpn evpn rd ASN:NN_OR_IP-ADDRESS:NN neighbors advertised-routes [json] (view) show [ip] bgp l2vpn evpn rd ASN:NN_OR_IP-ADDRESS:NN neighbors routes [json] ... Note that when entering spaces as part of a regex specification, repeated spaces will be compressed into a single space for matching purposes. This is a consequence of spaces being used to delimit CLI tokens. If you need to match more than one space, use the ``\s`` escape. POSIX Extended Regular Expressions are supported. .. _common-show-commands: .. clicmd:: show event cpu [r|w|t|e|x] This command displays system run statistics for all the different event types. If no options is specified all different run types are displayed together. Additionally you can ask to look at (r)ead, (w)rite, (t)imer, (e)vent and e(x)ecute thread event types. .. clicmd:: show event poll This command displays FRR's poll data. It allows a glimpse into how we are setting each individual fd for the poll command at that point in time. .. clicmd:: show event timers This command displays FRR's timer data for timers that will pop in the future. .. clicmd:: show configuration running [ [translate WORD]] [with-defaults] DAEMON This command displays the northbound/YANG configuration data for a daemon in text/vty, json, or xml format. .. clicmd:: show yang operational-data XPATH [{format |translate TRANSLATOR|with-config}] DAEMON Display the YANG operational data starting from XPATH. The default format is JSON, but can be displayed in XML as well. Normally YANG operational data are located inside containers marked as `read-only`. Optionally it is also possible to display configuration leaves in addition to operational data with the option `with-config`. This option enables the display of configuration leaves with their currently configured value (if the leaf is optional it will only show if it was created or has a default value). .. _common-invocation-options: Common Invocation Options ========================= These options apply to all |PACKAGE_NAME| daemons. .. option:: -d, --daemon Run in daemon mode. .. option:: -f, --config_file Set configuration file name. .. option:: -h, --help Display this help and exit. .. option:: -i, --pid_file Upon startup the process identifier of the daemon is written to a file, typically in :file:`/var/run`. This file can be used by the init system to implement commands such as ``.../init.d/zebra status``, ``.../init.d/zebra restart`` or ``.../init.d/zebra stop``. The file name is an run-time option rather than a configure-time option so that multiple routing daemons can be run simultaneously. This is useful when using |PACKAGE_NAME| to implement a routing looking glass. One machine can be used to collect differing routing views from differing points in the network. .. option:: -A, --vty_addr
Set the VTY local address to bind to. If set, the VTY socket will only be bound to this address. .. option:: -P, --vty_port Set the VTY TCP port number. If set to 0 then the TCP VTY sockets will not be opened. .. option:: -u Set the user and group to run as. .. option:: -N Set the namespace that the daemon will run in. A "/" will be added to all files that use the statedir. If you have "/var/run/frr" as the default statedir then it will become "/var/run/frr/". .. option:: -o, --vrfdefaultname Set the name used for the *Default VRF* in CLI commands and YANG models. This option must be the same for all running daemons. By default, the name is "default". .. seealso:: :ref:`zebra-vrf` .. option:: -v, --version Print program version. .. option:: --command-log-always Cause the daemon to always log commands entered to the specified log file. This also makes the `no log commands` command disallowed. Enabling this is suggested if you have need to track what the operator is doing on this router. .. option:: --log When initializing the daemon, setup the log to go to either stdout, syslog or to a file. These values will be displayed as part of a show run. Additionally they can be overridden at runtime if desired via the normal log commands. .. option:: --log-level When initializing the daemon, allow the specification of a default log level at startup from one of the specified levels. .. option:: --tcli Enable the transactional CLI mode. .. option:: --limit-fds Limit the number of file descriptors that will be used internally by the FRR daemons. By default, the daemons use the system ulimit value. .. _loadable-module-support: Loadable Module Support ======================= FRR supports loading extension modules at startup. Loading, reloading or unloading modules at runtime is not supported (yet). To load a module, use the following command line option at daemon startup: .. option:: -M, --module Load the specified module, optionally passing options to it. If the module name contains a slash (/), it is assumed to be a full pathname to a file to be loaded. If it does not contain a slash, the |INSTALL_PREFIX_MODULES| directory is searched for a module of the given name; first with the daemon name prepended (e.g. ``zebra_mod`` for ``mod``), then without the daemon name prepended. This option is available on all daemons, though some daemons may not have any modules available to be loaded. The SNMP Module --------------- If SNMP is enabled during compile-time and installed as part of the package, the ``snmp`` module can be loaded for the *Zebra*, *bgpd*, *ospfd*, *ospf6d* and *ripd* daemons. The module ignores any options passed to it. Refer to :ref:`snmp-support` for information on its usage. The FPM Module -------------- If FPM is enabled during compile-time and installed as part of the package, the ``fpm`` module can be loaded for the *zebra* daemon. This provides the Forwarding Plane Manager ("FPM") API. The module expects its argument to be either ``Netlink`` or ``protobuf``, specifying the encapsulation to use. ``Netlink`` is the default, and ``protobuf`` may not be available if the module was built without protobuf support. Refer to :ref:`zebra-fib-push-interface` for more information. .. _virtual-terminal-interfaces: Virtual Terminal Interfaces =========================== VTY -- Virtual Terminal [aka TeletYpe] Interface is a command line interface (CLI) for user interaction with the routing daemon. .. _vty-overview: VTY Overview ------------ VTY stands for Virtual TeletYpe interface. It means you can connect to the daemon via the telnet protocol. To enable a VTY interface, you have to setup a VTY password. If there is no VTY password, one cannot connect to the VTY interface at all. :: % telnet localhost 2601 Trying 127.0.0.1... Connected to localhost. Escape character is '^]'. Hello, this is |PACKAGE_NAME| (version |PACKAGE_VERSION|) |COPYRIGHT_STR| User Access Verification Password: XXXXX Router> ? enable . . . Turn on privileged commands exit . . . Exit current mode and down to previous mode help . . . Description of the interactive help system list . . . Print command list show . . . Show system inform wh. . . Display who is on a vty Router> enable Password: XXXXX Router# configure terminal Router(config)# interface eth0 Router(config-if)# ip address 10.0.0.1/8 Router(config-if)# ^Z Router# .. _vty-modes: VTY Modes --------- There are three basic VTY modes: There are commands that may be restricted to specific VTY modes. .. _vty-view-mode: VTY View Mode ^^^^^^^^^^^^^ This mode is for read-only access to the CLI. One may exit the mode by leaving the system, or by entering `enable` mode. .. _vty-enable-mode: VTY Enable Mode ^^^^^^^^^^^^^^^ This mode is for read-write access to the CLI. One may exit the mode by leaving the system, or by escaping to view mode. .. _vty-other-modes: VTY Other Modes ^^^^^^^^^^^^^^^ This page is for describing other modes. .. _vty-cli-commands: VTY CLI Commands ---------------- Commands that you may use at the command-line are described in the following three subsubsections. .. _cli-movement-commands: CLI Movement Commands ^^^^^^^^^^^^^^^^^^^^^ These commands are used for moving the CLI cursor. The :kbd:`C` character means press the Control Key. :kbd:`C-f` / :kbd:`LEFT` Move forward one character. :kbd:`C-b` / :kbd:`RIGHT` Move backward one character. :kbd:`M-f` Move forward one word. :kbd:`M-b` Move backward one word. :kbd:`C-a` Move to the beginning of the line. :kbd:`C-e` Move to the end of the line. .. _cli-editing-commands: CLI Editing Commands ^^^^^^^^^^^^^^^^^^^^ These commands are used for editing text on a line. The :kbd:`C` character means press the Control Key. :kbd:`C-h` / :kbd:`DEL` Delete the character before point. :kbd:`C-d` Delete the character after point. :kbd:`M-d` Forward kill word. :kbd:`C-w` Backward kill word. :kbd:`C-k` Kill to the end of the line. :kbd:`C-u` Kill line from the beginning, erasing input. :kbd:`C-t` Transpose character. CLI Advanced Commands ^^^^^^^^^^^^^^^^^^^^^ There are several additional CLI commands for command line completions, insta-help, and VTY session management. :kbd:`C-c` Interrupt current input and moves to the next line. :kbd:`C-z` End current configuration session and move to top node. :kbd:`C-n` / :kbd:`DOWN` Move down to next line in the history buffer. :kbd:`C-p` / :kbd:`UP` Move up to previous line in the history buffer. :kbd:`TAB` Use command line completion by typing :kbd:`TAB`. :kbd:`?` You can use command line help by typing ``help`` at the beginning of the line. Typing :kbd:`?` at any point in the line will show possible completions. Pipe Actions ^^^^^^^^^^^^ VTY supports optional modifiers at the end of commands that perform postprocessing on command output or modify the action of commands. These do not show up in the :kbd:`?` or :kbd:`TAB` suggestion lists. ``... | include REGEX`` Filters the output of the preceding command, including only lines which match the POSIX Extended Regular Expression ``REGEX``. Do not put the regex in quotes. Examples: :: frr# show ip bgp sum json | include remoteAs "remoteAs":0, "remoteAs":455, "remoteAs":99, :: frr# show run | include neigh.*[0-9]{2}\.0\.[2-4]\.[0-9]* neighbor 10.0.2.106 remote-as 99 neighbor 10.0.2.107 remote-as 99 neighbor 10.0.2.108 remote-as 99 neighbor 10.0.2.109 remote-as 99 neighbor 10.0.2.110 remote-as 99 neighbor 10.0.3.111 remote-as 111