Table Of Contents

clear console-output through clear xlate Commands

clear console-output

clear counters

clear crashinfo

clear crypto accelerator statistics

clear crypto ca crls

clear [crypto] ipsec sa

clear crypto protocol statistics

clear dhcpd

clear dhcprelay statistics

clear dns-hosts cache

clear failover statistics

clear fragment

clear gc

clear igmp counters

clear igmp group

clear igmp traffic

clear interface

clear ip audit count

clear ip verify statistics

clear ipsec sa

clear ipv6 access-list counters

clear ipv6 mld traffic

clear ipv6 neighbors

clear ipv6 traffic

clear isakmp sa

clear local-host

clear logging asdm

clear logging buffer

clear mac-address-table

clear memory delayed-free-poisoner

clear memory profile

clear mfib counters

clear module recover

clear ospf

clear pc

clear pclu

clear pim counters

clear pim reset

clear pim topology

clear priority-queue statistics

clear resource usage

clear route

clear service-policy

clear service-policy inspect gtp

clear service-policy inspect radius-accounting

clear shun

clear startup-config errors

clear sunrpc-server active

clear traffic

clear uauth

clear url-block block statistics

clear url-cache statistics

clear url-server

clear wccp

clear xlate

clear console-output through clear xlate Commands

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clear console-output

To remove the currently captured console output, use the clear console-output command in privileged EXEC mode.

clear console-output

Syntax Description

This command has no arguments or keywords.

Defaults

No default behavior or values.

Command Modes

The following table shows the modes in which you can enter the command:

Command Mode	Firewall Mode		Security Context
	Routed	Transparent	Single	Multiple
				Context	System
Privileged EXEC	•	•	•	•	•

Command History

Release	Modification
Preexisting	This command was preexisting.

Examples

The following example shows how to remove the currently captured console output:

hostname# clear console-output

Related Commands

Command	Description
console timeout	Sets the idle timeout for a console connection to the security appliance.
show console-output	Displays the captured console output.
show running-config console timeout	Displays the idle timeout for a console connection to the security appliance.

clear counters

To clear the protocol stack counters, use the clear counters command in global configuration mode.

clear counters [all | context context-name | summary | top N ] [detail] [protocol protocol_name [:counter_name]] [ threshold N]

Syntax Description

all	(Optional) Clears all filter details.
context context-name	(Optional) Specifies the context name.
:counter_name	(Optional) Specifies a counter by name.
detail	(Optional) Clears detailed counters information.
protocol protocol_name	(Optional) Clears the counters for the specified protocol.
summary	(Optional) Clears the counter summary.
threshold N	(Optional) Clears the counters at or above the specified threshold. The range is 1 through 4294967295.
top N	(Optional) Clears the counters at or above the specified threshold. The range is 1 through 4294967295.

Defaults

clear counters summary detail

Command Modes

The following table shows the modes in which you can enter the command:

Command Mode	Firewall Mode		Security Context
	Routed	Transparent	Single	Multiple
				Context	System
Global configuration	•	•	•	•	•

Command History

Release	Modification
7.0(1)	This command was introduced.

Examples

This example shows how to clear the protocol stack counters:

hostname(config)# clear counters

Related Commands

Command	Description
show counters	Displays the protocol stack counters.

clear crashinfo

To delete the contents of the crash file in Flash memory, enter the clear crashinfo command in privileged EXEC mode.

clear crashinfo

Syntax Description

This command has no arguments or keywords.

Defaults

No default behaviors or values.

Command Modes

The following table shows the modes in which you can enter the command:

Command Mode	Firewall Mode		Security Context
	Routed	Transparent	Single	Multiple
				Context	System
Privileged EXEC	•	•	•	—	•

Command History

Release	Modification
Preexisting	This command was preexisting.

Usage Guidelines

This command has no usage guidelines.

Examples

The following command shows how to delete the crash file:

hostname# clear crashinfo

Related Commands

crashinfo force	Forces a crash of the security appliance.
crashinfo test	Tests the ability of the security appliance to save crash information to a file in Flash memory.
show crashinfo	Displays the contents of the crash file stored in Flash memory.

clear crypto accelerator statistics

To clear the the global and accelerator-specific statistics from the crypto accelerator MIB, use the clear crypto accelerator statistics command in global configuration and privileged EXEC modes.

clear crypto accelerator statistics

Syntax Description

This command has no keywords or variables.

Defaults

No default behavior or values.

Command Modes

The following table shows the mode in which you can enter the command:

Command Mode	Firewall Mode		Security Context
	Routed	Transparent	Single	Multiple
				Context	System
Global configuration	•	•	•	—	—
Privileged EXEC	•	•	•	—	—

Command History

Release	Modification
7.0(1)	This command was introduced.

Examples

The following example entered in global configuration mode, displays crypto accelerator statistics:

hostname(config)# clear crypto accelerator statistics

hostname(config)# 

Related Commands

Command	Description
clear crypto protocol statistics	Clears the protocol-specific statistics in the crypto accelerator MIB.
show crypto accelerator statistics	Displays the global and accelerator-specific statistics in the crypto accelerator MIB.
show crypto protocol statistics	Displays the protocol-specific statistics from the crypto accelerator MIB.

clear crypto ca crls

To remove the CRL cache of all CRLs associated with a specified trustpoint or to remove the CRL cache of all CRLs, use the clear crypto ca crls command in global configuration.

clear crypto ca crls [trustpointname]

Syntax Description

trustpointname

(Optional) The name of a trustpoint. If you do not specify a name, this command clears all CRLs cached on the system.

Defaults

No default behavior or values.

Command Modes

The following table shows the modes in which you can enter the command:

Command Mode	Firewall Mode		Security Context
	Routed	Transparent	Single	Multiple
				Context	System
Global configuration	•	•	•	•

Command History

Release	Modification
7.0(1)	This command was introduced.

Examples

The following example issued in global configuration mode, removes all of the CRL cache from all CRLs from the security appliance:

hostname(config)# clear crypto ca crls

hostname(config)# 

Related Commands

Command	Description
crypto ca crl request	Downloads the CRL based on the CRL configuration of the trustpoint.
show crypto ca crls	Displays all cached CRLs or CRLs cached for a specified trustpoint.

clear [crypto] ipsec sa

To remove the IPSec SA counters, entries, crypto maps or peer connections, use the clear [crypto] ipsec sa command in global configuration mode. To clear all IPSec SAs, use this command without arguments.

clear [crypto] ipsec sa [counters | entry {hostname | IP address} {esp | ah} {SPI}| map {map name} | peer {hostname | IP address}]

Be careful when using this command.

Syntax Description

ah	Authentication header.
counters	Clears all IPSec per SA statistics.
entry	Deletes the tunnel that matches the specified IP address/hostname, protocol and SPI value.
esp	Encryption security protocol.
hostname	Identified a hostname assigned to an IP address.
IP address	Identifies an IP address.
map	Deletes all tunnels associated with the specified crypto map as identified by map name.
map name	An alphanumeric string that identifies a crypto map. Max 64 characters.
peer	Deletes all IPSec SAs to a peer as identified by the specified hostname or IP address.
SPI	Identifies the Security Parameters Index (a hexidecimal number).

Defaults

No default behavior or values.

Command Modes

The following table shows the modes in which you can enter the command:

Command Mode	Firewall Mode		Security Context
	Routed	Transparent	Single	Multiple
				Context	System
Global configuration	•	—	•	—	—

Command History

Release	Modification
7.0(1)	This command was introduced.

Examples

The following example, issued in global configuration mode, removes all of the IPSec SAs from the security appliance:

hostname(config)# clear ipsec sa

hostname(config)# 

The next example, issued in global configuration mode, deletes SAs with a peer IP address of 10.86.1.1.

hostname(config)# clear ipsec peer 10.86.1.1

hostname(config)#

Related Commands

Command	Description
clear configure crypto map	Clears all or specified crypto maps from the configuration.
clear configure isakmp	Clears all ISAKMP policy configuration.
show ipsec sa	Displays information about IPSec SAs, including counters, entry, map name, peer IP address and hostname.
show running-config crypto	Displays the entire crypto configuration, including IPSec, crypto maps, dynamic crypto maps, and ISAKMP.

clear crypto protocol statistics

To clear the protocol-specific statistics in the crypto accelerator MIB, use the clear crypto protocol statistics command in global configuration or privileged EXEC modes.

clear crypto protocol statistics protocol

Syntax Description

protocol

Specifies the name of the protocol for which you want to clear statistics. Protocol choices are as follows: ikev1—Internet Key Exchange version 1. ipsec—IP Security Phase-2 protocols. ssl—Secure Socket Layer. other—Reserved for new protocols. all—All protocols currently supported. In online help for this command, other protocols may appear that will be supported in future releases.

Defaults

No default behavior or values.

Command Modes

The following table shows the mode in which you can enter the command:

Command Mode	Firewall Mode		Security Context
	Routed	Transparent	Single	Multiple
				Context	System
Global configuration	•	•	•	—	—
Privileged EXEC	•	•	•	—	—

Command History

Release	Modification
7.0(1)	This command was introduced.

Examples

The following example entered in global configuration mode, clears all crypto accelerator statistics:

hostname(config)# clear crypto protocol statistics all

hostname(config)# 

Related Commands

Command	Description
clear crypto accelerator statistics	Clears the global and accelerator-specific statistics in the crypto accelerator MIB.
show crypto accelerator statistics	Displays the global and accelerator-specific statistics from the crypto accelerator MIB.
show crypto protocol statistics	Displays the protocol-specific statistics in the crypto accelerator MIB.

clear dhcpd

To clear the DHCP server bindings and statistics, use the clear dhcp command.

clear dhcpd {binding [IP_address] | statistics}

Syntax Description

binding	Clears all the client address bindings.
IP_address	Clears the binding for the specified IP address.
statistics	Clears statistical information counters.

Defaults

No default behavior or values.

Command Modes

The following table shows the modes in which you can enter the command:

Command Mode	Firewall Mode		Security Context
	Routed	Transparent	Single	Multiple
				Context	System
Global configuration	•	•	•	•	—

Command History

Release	Modification
Preexisting	This command was preexisting.

Usage Guidelines

If you include the optional IP address in the clear dhcpd binding command, only the binding for that IP address is cleared.

To clear all of the DHCP server commands, use the clear configure dhcpd command.

Examples

The following example shows how to clear the dhcpd statistics:

hostname(config)# clear dhcpd statistics

Related Commands

Command	Description
clear configure dhcpd	Removes all DHCP server settings.
show dhcpd	Displays DHCP binding, statistic, or state information.

clear dhcprelay statistics

To clear the DHCP relay statistic counters, use the clear dhcprelay statistics command in privileged EXEC mode.

clear dhcprelay statistics

Syntax Description

This command has no arguments or keywords.

Defaults

No default behavior or values.

Command Modes

The following table shows the modes in which you can enter the command:

Command Mode	Firewall Mode		Security Context
	Routed	Transparent	Single	Multiple
				Context	System
Privileged EXEC	•	—	•	•	—

Command History

Release	Modification
Preexisting	This command was preexisting.

Usage Guidelines

The clear dhcprelay statistics command only clears the DHCP relay statistic counters. To clear the entire DHCP relay configuration, use the clear configure dhcprelay command.

Examples

The following example shows how to clear the DHCP relay statistics:

hostname# clear dhcprelay statistics

hostname# 

Related Commands

Command	Description
clear configure dhcprelay	Removes all DHCP relay agent settings.
debug dhcprelay	Displays debug information for the DHCP relay agent.
show dhcprelay statistics	Displays DHCP relay agent statistic information.
show running-config dhcprelay	Displays the current DHCP relay agent configuration.

clear dns-hosts cache

To clear the DNS cache, use the clear dns-hosts cache command in privileged EXEC mode. This command does not clear static entries you added with the name command.

clear dns-hosts cache

Syntax Description

This command has no arguments or keywords.

Defaults

No default behavior or values.

Command Modes

The following table shows the modes in which you can enter the command:

Command Mode	Firewall Mode		Security Context
	Routed	Transparent	Single	Multiple
				Context	System
Privileged EXEC	•	•	•	•	—

Command History

Release	Modification
7.0(1)	This command was introduced.

Examples

The following example clears the DNS cache:

hostname# clear dns-hosts cache

Related Commands

Command	Description
dns domain-lookup	Enables the security appliance to perform a name lookup.
dns name-server	Configures a DNS server address.
dns retries	Specifies the number of times to retry the list of DNS servers when the security appliance does not receive a response.
dns timeout	Specifies the amount of time to wait before trying the next DNS server.
show dns-hosts	Shows the DNS cache.

clear failover statistics

To clear the failover statistic counters, use the clear failover statistics command in privileged EXEC mode.

clear failover statistics

Syntax Description

This command has no arguments or keywords.

Defaults

No default behavior or values.

Command Modes

The following table shows the modes in which you can enter the command:

Command Mode	Firewall Mode		Security Context
	Routed	Transparent	Single	Multiple
				Context	System
Privileged EXEC	•	•	•	•	•

Command History

Release	Modification
Preexisting	This command was introduced.

Usage Guidelines

This command clears the statistics displayed with the show failover statistics command and the counters in the Stateful Failover Logical Update Statistics section of the show failover command output. To remove the failover configuration, use the clear configure failover command.

Examples

The following example shows how to clear the failover statistic counters:

hostname# clear failover statistics

hostname# 

Related Commands

Command	Description
debug fover	Displays failover debug information.
show failover	Displays information about the failover configuration and operational statistics.

clear fragment

To clear the operational data of the IP fragment reassembly module, enter the clear fragment command in privileged EXEC mode. This command clears either the currently queued fragments that are waiting for reassembly (if the queue keyword is entered) or clears all IP fragment reassembly statistics (if the statistics keyword is entered). The statistics are the counters, which tell how many fragments chains were successfully reassembled, how many chains failed to be reassembled, and how many times the maximum size was crossed resulting in overflow of the buffer.

clear fragment {queue | statistics} [interface]

Syntax Description

interface	(Optional) Specifies the security appliance interface.
queue	Clears the IP fragment reassembly queue.
statistics	Clears the IP fragment reassembly statistics.

Defaults

If an interface is not specified, the command applies to all interfaces.

Command Modes

The following table shows the modes in which you can enter the command:

Command Mode	Firewall Mode		Security Context
	Routed	Transparent	Single	Multiple
				Context	System
Privileged EXEC	•	•	•	•	—

Command History

Release	Modification
7.0(1)	The command was separated into two commands, clear fragment and clear configure fragment, to separate clearing of the configuration data from the operational data.

Examples

This example shows how to clear the operational data of the IP fragment reassembly module:

hostname# clear fragment queue

Related Commands

Command	Description
clear configure fragment	Clears the IP fragment reassembly configuration and resets the defaults.
fragment	Provides additional management of packet fragmentation and improves compatibility with NFS.
show fragment	Displays the operational data of the IP fragment reassembly module.
show running-config fragment	Displays the IP fragment reassembly configuration.

clear gc

To remove the garbage collection process statistics, use the clear gc command in privileged EXEC mode.

clear gc

Syntax Description

This command has no arguments or keywords.

Defaults

No default behaviors or values.

Command Modes

The following table shows the modes in which you can enter the command:

Command Mode	Firewall Mode		Security Context
	Routed	Transparent	Single	Multiple
				Context	System
Privileged EXEC	•	•	•	—	•

Command History

Release	Modification
7.0(1)	This command was introduced.

Examples

The following example shows how to remove the garbage collection process statistics:

hostname# clear gc

Related Commands

Command	Description
show gc	Displays the garbage collection process statistics.

clear igmp counters

To clear all IGMP counters, use the clear igmp counters command in privileged EXEC mode.

clear igmp counters [if_name]

Syntax Description

if_name

The interface name, as specified by the nameif command. Including an interface name with this command causes only the counters for the specified interface to be cleared.

This command has no arguments or keywords.

Defaults

No default behavior or values.

Command Modes

The following table shows the modes in which you can enter the command:

Command Mode	Firewall Mode		Security Context
	Routed	Transparent	Single	Multiple
				Context	System
Privileged EXEC	•	—	•	—	—

Command History

Release	Modification
7.0(1)	This command was introduced.

Examples

The following example clears the IGMP statistical counters:

hostname# clear igmp counters

Related Commands

Command	Description
clear igmp group	Clears discovered groups from the IGMP group cache.
clear igmp traffic	Clears the IGMP traffic counters.

clear igmp group

To clear discovered groups from the IGMP group cache, use the clear igmp command in privileged EXEC mode.

clear igmp group [group | interface name]

Syntax Description

group	IGMP group address. Specifying a particular group removes the specified group from the cache.
interface name	Interface name, as specified by the namif command. When specified, all groups associated with the interface are removed.

Defaults

No default behavior or values.

Command Modes

The following table shows the modes in which you can enter the command:

Command Mode	Firewall Mode		Security Context
	Routed	Transparent	Single	Multiple
				Context	System
Privileged EXEC	•	—	•	—	—

Command History

Release	Modification
Preexisting	This command was preexisting.

Usage Guidelines

If you do not specify a group or an interface, all groups are cleared from all interfaces. If you specify a group, only the entries for that group are cleared. If you specify an interface, then all groups on that interface are cleared. If you specify both a group and an interface, only the specified groups on the specified interface are cleared.

This command does not clear statically configured groups.

Examples

The following example shows how to clear all discovered IGMP groups from the IGMP group cache:

hostname# clear igmp group

Related Commands

Command	Description
clear igmp counters	Clears all IGMP counters.
clear igmp traffic	Clears the IGMP traffic counters.

clear igmp traffic

To clear the IGMP traffic counters, use the clear igmp traffic command in privileged EXEC mode.

clear igmp traffic

Syntax Description

This command has no arguments or keywords.

Defaults

No default behavior or values.

Command Modes

The following table shows the modes in which you can enter the command:

Command Mode	Firewall Mode		Security Context
	Routed	Transparent	Single	Multiple
				Context	System
Privileged EXEC	•	—	•	—	—

Command History

Release	Modification
7.0(1)	This command was introduced.

Examples

The following example clears the IGMP statistical traffic counters:

hostname# clear igmp traffic

Related Commands

Command	Description
clear igmp group	Clears discovered groups from the IGMP group cache.
clear igmp counters	Clears all IGMP counters.

clear interface

To clear interface statistics, use the clear interface command in privileged EXEC mode.

clear interface [physical_interface[.subinterface] | mapped_name | interface_name]

Syntax Description

interface_name	(Optional) Identifies the interface name set with the nameif command.
mapped_name	(Optional) In multiple context mode, identifies the mapped name if it was assigned using the allocate-interface command.
physical_interface