Cisco IOS basic system management command reference

absolute : to specify an absolute time for a time-range (in time-range configuration mode)

no absolute

buffer-length : to specify the maximum length of the data stream to be forwarded (in line configuration mode)

no buffer-length

buffers : to make adjustments to initial public buffer pool settings and to the limits at whih temporarybuffers are created and destroyed (in global configuration mode)

no buffers

buffers huge size : to dyn amically resie all huge buffers to the value you specify (in global configuration mode)

no buffers huge size

buffers tune automatic : to enable automatic tuning of buffers (in global configuration mode)

no buffers tune automatic

calendar set : to manually set the hardware clock(calendar) (in EXEC mode)

clear platform hardware capacity rewrite-engine counter : to clear the packet drop and performance counters of the central rewrite engine on supervisirs and line cards (in privileged EXEC mode)

clock calendar-valid : to configure a system as an authoritatve time source for a network based on its hardware clock(calendar) (in global configuration mode)

no clock calendar-valid

clock read-calendat : to manually read the hardware clock (calendar) settings into the software clock (in EXEC mode)

clock save interval : to preserve recent date and time information in NVRAM for when a Cisco IOS device without a battery-backed calendat is power-cycled or reloaded (in global configuration mode)

no clock save interval

clock set : to manuallyset the system software clock (in privileged EXEC mode)

clock summer-tmie : to configure the system to automatically switch to summer time(daylight saving time) (in global configuration mode)

no clock summer-time

clock timezone : to set the time zone for display purpose (in global configuration mode)

no clock timezone

clock update-calendar : to perform a one-time updat of the hardware clock(calendar) from the software clock (in user EXEC or privileged EXEC mode)

exception core-file : to specify the name of the core dump file in Cisco IOS or Cisco IOS Software odularity software (in global configuration mode)

no exception core-file

exception crashinfo buffrsize : to change the size of the buffer used for crashinfo files (in global configuration mode)

no exception crashinfo buffersize

exception crashinfo dump : to specify the type of output information to be written to the crashinfo file (in global configuration mode)

no exception crashinfo dump

excpetion crashinfo file : to enable the creation of diagnostic file at the time of unexpected system shutdowns (in global configuration mode)

no exception crashinfo file

exception crashinfo maximum files : to enable a Cisco device to automatically delete old crashinfo files to help create space for writing the new crashinfo files when a system crashes (in global configuration mode)

no exception crashinfo maximum files

exception data-corruption : to manage data error excpetion (in global configuration mode)

no exception data-corruption

exception delay-dump : to pause or delay the dump of data error exception to the host (in global configuration mode)

no exception delay-dump

exception dump : to configure the router to dump a core file to a prticulat server when the router crashes (in global configuration mode)

no exception dump

exception linecard : to enable storing of crash information for a line card and optionally specify the type and amount of information stored (in global configuration mode)

no exception linecard

exception memory : to set free memory and memory block size threshold parameters (in global configuration mode)

no exception memory

exception memory ignore overflow : to configure the Cisco IOS software to correct corruption in memory block headers and allow a router to continue its normal operation (in global configuration mode)

no exception memory ignore overflow

exception protocol : to configure the protocol used for core dumps (in global configuration mode)

no exception protocol

exception region-size : to specify the size of the region for the exception-time memor pool (in global configuration mode)

no exception region-size

exception spurious-interrupt : to configure the router to create a core dump and reload after a specified number of spurious interrupts (in global configuration mode)

no exception spurious-interrupt

monitor event-trace cpu-report : to monitor the event tracing of the CPU reports (in user EXEC or privileged EXEC mode)

monitor event-trace cpu-report : to monitor the collection of CPU report traces (in global onfiguration mode)

ntp access-group : to control access to Network Time Protocol(NTP) services on the system (in global configuration mode)

no ntp access-group

ntp allow mode private : to allow the processing of private mode Network Time Protocol (NTP) packets (in global cofiguration mode)

no ntp allow mode private

ntp authenticate : to enable Network Time Protocol (NTP) authentication (in global configuration mode)

no ntp authenticate

ntp authentication-key : to define an authentiation key for Network Time Protocol (NTP) (in global configuration mode)

no nep authentication-key

ntp broadcast : to configure the options for broadcasting Network Time Protocol(NTP) traffic (in interface configuration mode)

no ntp broadcast

ntp broadcast client : to configure a device to receive Network Time Protocol(NTP) broadcast messages on a specified interface (in interface configuration mode)

no ntp broadcast client

ntp broadcastedlay : to set the estimated round-trip delay between the Cisco IOS software and a Network Time Protocol(NTP) broadcast server (in global configuration mode)

no ntp

ntp clear drift : to reset the drift value stored in the persistent data file (in privileged EXEC mode)

ntp clock-period

no ntp clock-period

ntp disable : to prevent an interface from receiving Network Time Protocol (NTP) packets (in interface configuration mode)

no ntp disable

ntp logging : to enable Networking Time Protocol(NTP) message logging (in global configuration mode)

no ntp

ntp master : to configure the Cisco IOS software as a Netwrok Time Protocol (NTP) master clock to which peers synchronie themselves when an external NTP souce is not available (in global configuration mode)

no ntp

ntp max-associations : to configure the maximum number of Network Time Protocol (NTP) peers and clients for a routing device (in global configuration mode)

no ntp

ntp maxdistance : to configure a maximum distance threshold value to govern the number of packets required for synchronization of peers in NNetwork Time Protocol version 4 (NTPv4) (in global configuration mode)

no ntp

ntp multicast : to configure a system to send Netwrok Time Protocol (NTP) multicast packets on a specified interface (in interface configuration mode)

no nep multicast

ntp multicast client : to configure the system to receive Network Time Protocol (NTP) multicast packets on a specified interface (in interface configuration mode)

no ntp multicast client

ntp orphan : to enable a group of Network Time Protocol (NTP) evices to select one among them to be the simulated Coordinated Universal Time (UTC0 source if all real-time clock sources become inaccessible (in global configuration mode)

no ntp orphan

ntp panic update : to configure Network Time Protocol(NTP) to reect time updates greater then the panic threshold of 1000 seconds (in global configuration mode)

no ntp panic update

ntp passive : to configure passive Network Time Protocol(NTP) associations (in global configuration mode)

no ntp

ntp peer : to configure a router to allow its software clock to be synchronized with the software clock of a Network Time Protocol (NTP) peer or to allow the software clock of a NTP peer to be synchronized with the software clock of the router (in global configuration mode)

no ntp peer

ntp refclock : to configure an external clock source for use with Network Time Protocol (NTP) services (in line configuration mode)

no nep refclock

ntp server : to configure a router to allow its software clock to be synchronized with the software clock of a Network Time Protocol (NTP) time server (in global configuration mode)

no ntp server

ntp source : to use a particular source address in Network Time Protocol(NTP) packets (in global configuration mode)

no ntp

ntp trusted-key : to authenticate the identity of a system to which Network Time Protocl (NTP) will synchronize (in global configuration mode)

no ntp trusted-key

ntp update-caledar : to periodically update the hardware clock (calendar) from a Network Time Protocol(NTP) time source (in global configuration mode)

no ntp update-caendar

show buffers leak : to display the details of all the buffers that ate older than one minute in the system (in user EXEC or privileged EXEC mode)

show buffers tune : to display the details of automatic tuning of buffers (in user EXEC or privileged EXEC mode)

show buffers usage : to display the details of the buffer usage pattern in a specified buffer pool (in user EXEC or privileged EXEC mode)

show calendar : to display the current time and date setting for the hardware clock (in EXEC mode)

show clock : to display the time and date from the system software clock (in user EXEC or privileged EXEC mode)

show ntp associations : to display the status of Ntwrok Time Protocol (NTP) associations (in user EXEC or privileged EXEC mode)

show ntp info : to display static information about Network Time Protocol(NTP) entities (in user EXEC or privileged EXEC mode)

show ntp packets : to display information about Network Time Protocol(NTP) packets (in user EXEC or privileged EXEC mode)

show ntp status : to display the status of the Network Time Protocol(NTP) (in user EXEC or privileged EXEC mode)

show sntp : to show information about the Simple Network Time Protocol (SNTP) (in EXEC mode)

show time-range : to display information about configured time ranges (in user EXEC or privileged EXEC mode)

sntp broadcast client : to use the Simple Network Tme Protocol9SNTP) to acept Network Time Protocol(NTP) traffic from any broadcast server (in global onfiguration mode to configure a Cisco router

no sntp broadcast client

sntp logging : to enable Simple Network Time Protocol 9SNTP) message logging (in global configuration mode)

no sntp logging

sntp server : to configure a Cisco router to use the Simple Network Time Protocol(SNTP) to request and accept Network Time Protocol(NTP) traffic from a stratun 1 time server (in global configurationn mode)

no sntp server

sntp source-interface : to use a particular source address in Simple Network Time Protocol (SNTP) packets (in global configuration mode)

no sntp source-interface

time-period : to set the time increment for automatically saving an archive file of the current running configuration in the Cisco configuration archive (in archive configuration mode)

no time-period

time-range : to enable time-range configuration mode and define time ranges for functions (such as extended access lists) (in globa configuration or webvpn context configuration mode)

no time-range

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