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 protocol statistics

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 verify statistics

clear ipsec sa

clear ipv6 access-list counters

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 ospf

clear pim counters

clear pim reset

clear pim topology

clear prompt

clear resource usage

clear route

clear service-policy

clear service-policy inspect gtp

clear shun

clear sunrpc-server active

clear traffic

clear uauth

clear url-block block statistics

clear url-cache statistics

clear url-server

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
1.1(1)	This command was introduced.

Usage Guidelines

The FWSM automatically captures output destined for the internal console port. Do not use the internal console port unless you are advised to do so by Cisco TAC.

Examples

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

hostname# clear console-output

Related Commands

Command	Description
show console-output	Displays the captured console output.

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	(Multiple mode only) Clears counters for all contexts.
context context-name	(Multiple mode only) Clears counters for the specified context name.
:counter_name	(Optional) Clears the specified counter.
detail	(Optional) Clears detailed counter information.
protocol protocol_name	(Optional) Clears the counters for the specified protocol.
summary	(Multiple mode only) Clears counters for all contexts.
threshold n	(Optional) Clears the counters at or above the specified threshold. The range is 1 through 4294967295.
top n	(Multiple mode only) Clears a counter for the contexts that are the top n users of the counter. You must specify a counter name with this option. The range is 1 through 4294967295.

Defaults

By default, the FWSM clears all counters.

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
2.2(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.
show counters description	Shows a list of protocol 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
3.1(1)	This command was introduced.

Usage Guidelines

This command has no usage guidelines.

Examples

The following example shows how to delete the crash file:

hostname# clear crashinfo

Related Commands

crashinfo force	Forces a crash of the FWSM.
crashinfo save disable	Disables crash information from writing to Flash memory.
crashinfo test	Tests the ability of the FWSM 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 global and accelerator-specific statistics from the crypto accelerator MIB, use the clear crypto accelerator statistics command in 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
Privileged EXEC	•	•	•	•	—

Command History

Release	Modification
3.1(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 mode.

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
3.1(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 FWSM:

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 protocol statistics

To clear the protocol-specific statistics in the crypto accelerator MIB, use the clear crypto protocol statistics command in 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 Sockets 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
Privileged EXEC	•	•	•	•	—

Command History

Release	Modification
3.1(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 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
2.2(1)	This command was introduced.

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
3.1(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 FWSM 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 FWSM 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
3.1(1)	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 FWSM 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
1.1(1)	This command was introduced.
3.1(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
1.1(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.

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
3.1(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
3.1(1)	This command was introduced.

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

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
3.1(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 [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.

Defaults

By default, this command clears all interface statistics.

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
1.1(1)	This command was introduced.

Usage Guidelines

The clear interface command clears all interface statistics except the number of input bytes. See the show interface command for detail about interface statistics.

If an interface is shared among contexts, and you enter this command within a context, the FWSM clears only statistics for the current context. If you enter this command in the system execution space, the FWSM clears the combined statistics.

You cannot use the interface name in the system execution space, because the nameif command is only available within a context. Similarly, if you mapped the interface ID to a mapped name using the allocate-interface command, you can only use the mapped name in a context.

Examples

The following example clears all interface statistics:

hostname# clear interface

Related Commands

Command	Description
clear configure interface	Clears the interface configuration.
interface	Configures an interface and enters interface configuration mode.
show interface	Displays the runtime status and statistics of interfaces.
show running-config interface	Displays the interface configuration.

clear ip verify statistics

To clear the Unicast RPF statistics, use the clear ip verify statistics command in privileged EXEC mode. See the ip verify reverse-path command to enable Unicast RPF.

clear ip verify statistics [interface interface_name]

Syntax Description

interface interface_name

Sets the interface on which you want to clear Unicast RPF statistics.

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
3.1(1)	This command was introduced.

Examples

The following example clears the Unicast RPF statistics:

hostname# clear ip verify statistics

Related Commands

Command	Description
clear configure ip verify reverse-path	Clears the ip verify reverse-path configuration.
ip verify reverse-path	Enables the Unicast Reverse Path Forwarding feature to prevent IP spoofing.
show ip verify statistics	Shows the Unicast RPF statistics.
show running-config ip verify reverse-path	Shows the ip verify reverse-path configuration.

clear ipsec sa

To clear IPSec SAs entirely or based on specified parameters, use the clear ipsec sa command in privileged EXEC mode. You can also use an alternate form, clear crypto ipsec sa.

clear ipsec sa [counters | entry peer-addr protocol spi | peer peer-addr | map map-name]

Syntax Description

counters	(Optional) Clears all counters.
entry	(Optional) Clears IPSec SAs for a specified IPSec peer, protocol and SPI.
map map-name	(Optional) Clears IPSec SAs for the specified crypto map.
peer	(Optional) Clears IPSec SAs for a specified peer.
peer-addr	Specifies the IP address of an IPSec peer.
protocol	Specifies an IPSec protocol: esp or ah.
spi	Specifies an IPSec SPI.

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
3.1(1)	This command was introduced.

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