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Access and Communication Servers Command Reference
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About This Manual
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Access Server and Communication Server Product Overview
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User Interface Commands
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System Image and Configuration File Load Commands
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Configuring Terminal Lines and Modem Support
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System Management Commands
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User Interface Config Commands
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Dial on Demand Routing Commands
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X.25 Configuration Commands
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Frame Relay Commands
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SMDS Commands
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Telnet Configuration Commands
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LAT Configuration Commands
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TN3270 Configuration
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AppleTalk Remote Access Commands
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SLIP and PPP Configuration Commands
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XRemote Configuration Commands
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AppleTalk Routing Commands
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IP Commands
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IP Routing Protocols Commands
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Novell IPX Commands
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Protocol Translation Configuration Commands
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Appendix A, ASCII Character Set
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Appendix B, Modem and Chat Script Configuration
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Appendix C, Regular Expressions
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Appendix D, Refs and Reading
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Appendix E, X.3 PAD Parameters
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Table Of Contents
System Image and Configuration File Load Commands
System Image and Configuration File Load Commands
This chapter provides detailed descriptions of the commands used to load and copy system images and configuration files. System images contain the system software. Configuration files contain commands entered to customize the functions of the access server.
For access server configuration information and examples, refer to the "Loading System Images and Configuration Files" chapter in the Access and Communication Servers Configuration Guide.
Note
Commands in this chapter that have been replaced by new commands continue to perform their normal functions in the current release but are not longer documented. Support for these commands will cease in a future release.
Table 3-1 Mapping Old Commands to New Commands
For access server configuration information and examples, refer to the "Loading System Images, Microcode Images, and Configuration Files" chapter in the Access and Communication Servers Configuration Guide.
async-bootp
Use the async-bootp command to enable support for extended BOOTP requests as defined in RFC 1084 when the access server is configured for SLIP. Use the no form of this command to restore the default.
async-bootp tag [:hostname] data
no async-bootpSyntax Description
Table 3-2 Async-BOOTP Tag Keywords
Default
If no extended BOOTP commands are entered, the access server software generates a gateway and subnet mask appropriate for the local network.
Command Mode
Global configuration
Usage Guidelines
Use the EXEC command show async bootp to list the configured parameters. Use the no
async-bootp command to clear the list.Examples
The following example illustrates how to specify different boot files: one for a PC, and one for a Macintosh. With this configuration, a BOOTP request from the host on 172.30.1.1 results in a reply listing the boot filename as pcboot. A BOOTP request from the host named mac results in a reply listing the boot filename as macboot.
async-bootp bootfile :172.30.1.1 "pcboot"async-bootp bootfile :mac "macboot"The following example specifies a subnet mask of 255.255.0.0:
async-bootp subnet-mask 255.255.0.0The following example specifies a negative time offset of the local subnetwork of -3600 seconds:
async-bootp time-offset -3600The following example specifies the IP address of a time server:
async-bootp time-server 172.30.1.4Related Command
b
To boot the access server manually, use the b ROM monitor command.
b
b filename [ip-address]
b flash [filename]
b flash [device:][partition-number:][filename]Syntax Description
Default
If you enter the b command and press Return, the access server boots from ROM by default.
If you enter the b flash command without specifying a filename, the first valid file in Flash memory is loaded.
For other defaults, see the preceding Syntax Description section.
Command Mode
ROM monitor
Usage Guidelines
Use this command only when your access server cannot find the configuration information needed in nonvolatile memory. To get to the ROM monitor prompt (>), enter the reload EXEC command and then press the Break key during the first 60 seconds of startup, or for manual booting, change the boot bits in the configuration register to zero and then issue the reload command.
Examples
In the following example, the access server is manually booted from ROM:
> bF3:(ROM Monitor copyrights)In the following example, the file cstest is netbooted from IP address 172.30.15.112:
> b cstest 172.30.15.112F3:(ROM Monitor copyrights)The following example shows the b flash command without the filename argument.The first valid file in Flash memory is loaded.
> b flashF3: 1858656+45204+166896 at 0x1000Booting igs-k from flash memory RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR [OK - 1903912/13765276 bytes]F3: 1858676+45204+166896 at 0x1000(ROM Monitor copyrights)In the following example, the b flash command is used with the filename igs-k. This is the file that will be loaded.
> b flash igs-kF3: 1858656+45204+166896 at 0x1000Booting igs-k from flash memory RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR [OK - 1903912/13765276 bytes]F3: 1858676+45204+166896 at 0x1000(ROM Monitor copyrights)In the following example, the b flash flash command boots the relocatable image file igs-bpx-l from partition 2 in Flash memory.
> b flash flash:2:igs-bpx-lF3: 3562264+98228+303632 at 0x30000B4(ROM Monitor copyrights)boot bootstrap
To configure the filename that is used to boot a secondary bootstrap image, use the boot bootstrap global configuration command. Use the no form of the command to disable booting from a secondary bootstrap image.
boot bootstrap flash [filename]
no boot bootstrap flash [filename]
boot bootstrap mop filename [mac-address] [interface]
no boot bootstrap mop filename [mac-address] [interface]
boot bootstrap [tftp] filename [ip-address]
no boot bootstrap [tftp] filename [ip-address]Syntax Description
Default
No secondary bootstrap
Command Mode
Global configuration
Usage Guidelines
The boot bootstrap command, in conjunction with setting bit 9 on the configuration register of a access server, causes the access server to load a secondary bootstrap image over the network. The secondary bootstrap image then loads the specified system image file. The name of the secondary bootstrap file is boot-csc3 or boot-csc4, depending on the access server model. See the appropriate hardware installation guide for details on the configuration register and secondary bootstrap filename.
Use this command when you have attempted to load a system image but have run out of memory even after compressing the system image. Secondary bootstrap allows you to load a larger system image through a smaller secondary image.
Example
In the following example, the system image file sysimage-2 will be loaded by using a secondary bootstrap image:
boot bootstrap sysimage-2boot buffersize
To modify the buffer size used to load configuration files, use the boot buffersize global configuration command. Use the no form of the command to return to the default setting.
boot buffersize bytes
no boot buffersizeSyntax Description
bytes
Specifies the size of the buffer to be used. There is no minimum or maximum size that can be specified.
Default
Buffer size of the nonvolatile memory
Command Mode
Global configuration
Usage Guidelines
Normally, the access server uses a buffer the size of the system nonvolatile memory to hold configuration commands read from the network. You can increase this size if you have a very complex configuration. There is no minimum or maximum size that can be specified.
Example
The following example sets the buffer size to 64000:
boot buffersize 64000boot host
To change the default name of the host configuration filename from which you want to load configuration commands, use the boot host global configuration command. Use the no form of the command to restore the host configuration filename to the default.
boot host mop filename [mac-address] [interface]
no boot host mop filename [mac-address] [interface]
boot host [tftp | rcp] filename [ip-address]
no boot host [tftp | rcp] filename [ip-address]Syntax Description
Default
The access server uses its host name to form a host configuration filename. To form this name, the access server converts its name to all lowercase letters, removes all domain information, and appends -confg.
Command Mode
Global configuration
Usage Guidelines
Use the service config command to enable the loading of the specified configuration file at reboot time. Without this command, the access server ignores the boot host command and uses the configuration information in nonvolatile memory. If the configuration information in nonvolatile memory is invalid or missing, the service config command is enabled automatically.
The network server will attempt to load two configuration files from remote hosts. The first is the network configuration file containing commands that apply to all network servers on a network. The second is the host configuration file containing commands that apply to one network server in particular.
Example
The following example sets the host filename to wilma-confg at address 172.30.7.19:
boot host /usr/local/tftpdir/wilma-confg 172.30.7.19Related Commands
boot network
To change the default name of the network configuration file from which you want to load configuration commands, use the boot network global configuration command. Use the no form of this command to restore the network configuration filename to the default.
boot network mop filename [mac-address] [interface]
no boot network mop filename [mac-address] [interface]
boot network [tftp | rcp] filename [ip-address]
no boot network [tftp | rcp] filename [ip-address]Syntax Description
Default
The default filename is network-config. The default transfer protocol type is tftp, if neither tftp nor rcp is specified.
Command Mode
Global configuration
Usage Guidelines
When booting from a network server, access servers ignore routing information and static IP routes information. As a result, intermediate access servers are responsible for handling rcp or tftp requests correctly. Before booting from a network server, verify that a server is available by using the ping command.
Use the service config command to enable the loading of the specified configuration file at reboot time. Without this command, the access server ignores the boot network command and uses the configuration information in nonvolatile memory. If the configuration information in nonvolatile memory is invalid or missing, the service config command is enabled automatically.
The network server attempts to load two configuration files from remote hosts. The first is the network configuration file containing commands that apply to all network servers on a network. Use the boot network command to identify the network configuration file.
The rcp protocol requires that a client send the remote username on each rcp request to the network server. When the boot network rcp command is executed, the access server software sends the host name as the both the remote and local usernames. The rcp protocol implementation searches for the configuration files to be used relative to the account directory of the remote username on the network server.
If you copy the system image to a PC used as a file server, the remote host computer must support the remote shell (rsh) protocol.
CautionFor rcp, if you do not explicitly specify a remote username by issuing the ip rcmd remote-username command and the access server host name is used, an account for the access server host name must be defined on the destination server. If the network administrator of the destination server did not establish an account for the access server host name, this command will not execute successfully.
If you copy the system image to a personal computer used as a file server, the remote host computer must support the remote shell protocol.
Examples
The following example changes the network configuration filename to bridge_9.1 and uses the default broadcast address:
boot network bridge_9.1service configThe following example changes the network configuration filename to bridge_9.1, specifies that rcp is to be used as the transport mechanism, and gives 172.30.1.111 as the IP address of the server on which the network configuration file resides.
boot network RCP bridge_9.1 172.30.1.111service configRelated Commands
boot host
ip rcmd remote-username
service configboot system
To change the filename of the system image that is loaded onto the access server when it reboots, use the boot system global configuration command. Use the no boot system command to remove the name.
boot system flash [device:][partition-number:][filename]
no boot system flash [filename]
boot system mop filename [mac-address] [interface]
no boot system mop filename [mac-address] [interface]
boot system rom
no boot system rom
boot system [tftp | rcp] filename [ip-address]
no boot system [tftp | rcp] filename [ip-address]
boot system flash [device:][partition-number:][filename]
no boot systemSyntax Description
Default
If you do not specify a system image file with the boot system command, the access server uses the configuration register settings to determine the default system image filename for netbooting. The access server forms the default boot filename by starting with the word cisco and then appending the octal equivalent of the boot field number in the configuration register, followed by a hyphen, and the processor-type name (cisconn-cpu). See the appropriate hardware installation guide for details on the configuration register and default filename. See also the command config-register. See also the Syntax Description section preceding this section.
If neither tftp or rcp is specified, the default transfer protocol type is tftp.
Command Mode
Global configuration
Usage Guidelines
In order for this command to work, the config-register command must be set properly.
Enter several boot system commands to provide a fail-safe method for booting your access server. Use the boot system rom command to specify use of the ROM system image as a backup to other boot commands in the configuration. The boot system commands are stored and executed on the order in which they are entered. If you enter multiple boot commands of the same type—for example, if you enter two commands that instruct the access server to boot from different network servers—then the access server tries them in the order they are entered.
Each time you write a new software image to Flash memory, you must delete the existing filename in the configuration file with the no boot system flash filename command. Then add a new line in the configuration file with the boot system flash filename command.
Note
You can netboot from a compressed image. When a server netboots software, the image being booted and the running image must both fit into memory. Use compressed images to ensure that there is enough available memory to boot the access server. You can produce a compressed software image on any UNIX platform using the compress command. Refer to your UNIX platform's documentation for the exact usage of the compress command. (You can also uncompress data with the UNIX uncompress command.)
The rcp protocol requires that a client send the remote username on an rcp request to a server. When the boot system rcp command is executed, by default the access server software sends the host name as the both the remote and local usernames. The rcp software searches for the system image to be booted from the remote server relative to the directory of the remote username, if the server has a directory structure, for example, as do UNIX systems.
Examples
The following example shows a list specifying two possible internetwork locations for a system image, with the ROM software being used as a backup. When the system image is booted from either of the internetwork locations, TFTP is used as the transport mechanism:
boot system cs3-rx.90-1 172.30.7.24 boot system cs3-rx.83-2 172.30.7.19 boot system romThe following example boots the system boot relocatable image file igs-bpx-l from partition 2 of the Flash device.
boot system flash flash:2:igs-bpx-lRelated Commands
config-register
copy flash
copy rcp
copy tftp
ip rcmd remote-usernameconfigure
To enter global configuration mode, use the configure privileged EXEC command.
configure {terminal | memory | network}
Syntax Description
Default
None
Command Mode
Privileged EXEC
Usage Guidelines
If you do not specify terminal or memory the access server prompts you for the source of configuration commands. After you enter the configure command, the system prompt changes from Router-name# to Router-name(config)#, indicating that you are in global configuration mode. To leave global configuration mode and return to the privileged EXEC prompt, press Ctrl-Z. If you specify memory, the access server executes the commands located in NVRAM.
Example
In the following example, the access server is configured from the terminal:
Router# configureConfiguring from terminal, memory, or network [terminal]?Enter configuration commands, one per line. End with CNTL/Z.Related Commands
configure overwrite
copy running-config
show configuration
show running-config
configure overwrite
The copy rcp startup-config or copy tftp startup-config command replaces the configure overwrite command. If you use rcp, see the copy rcp command for more information. If you use TFTP, see the copy tftp command for more information.
config-register
To change the access server configuration register settings, use the config-register global configuration command.
config-register value
Syntax Description
Default
For the access server models without Flash memory, the default is 0x101, which causes the access server to boot from ROM and the Break key to be ignored. For access server models with Flash memory, the default is 0x10F, which causes the access server to boot from Flash memory and the Break key to be ignored.
Command Mode
Global configuration
Usage Guidelines
The lowest four bits of the configuration register (bits 3, 2, 1, and 0) form the boot field. The boot field determines if the access server boots manually, from ROM, or from Flash or the network. Bit 8 controls the console Break key; when set to 1, it causes the Break key to be ignored. The remaining bits control other features of the access server and are typically set to 0.
To change the boot field value and leave all other bits set to their default values, follow these guidelines:
•
•
•
For more information about the configuration register bit settings and default filenames, see the appropriate access server hardware installation guide.
Example
In the following example, the configuration register is set to boot the system image from Flash memory:
config-register 0x010FRelated Commands
continue
To return to the EXEC mode from ROM monitor mode, use the continue ROM monitor command.
continue
Syntax Description
This command has no arguments or keywords.
Command Mode
ROM monitor
Usage Guidelines
Use this command when you are in ROM monitor mode, and you want to return to EXEC mode to use the system image instead of reloading. The angle bracket (>) indicates that you are in ROM monitor mode. You are in ROM monitor mode when you manually load a system image or perform diagnostic tests. Otherwise, you will most likely never be in this mode.
CautionWhile in ROM monitor mode, the Cisco IOS system software is suspended until you issue either a reset or the continue command.
Example
In the following example, the continue command takes you from ROM monitor to EXEC mode:
> continueRouter#copy flash
To copy a file from Flash memory to another destination, use one of the following copy flash EXEC commands:
copy flash {rcp | tftp}
Syntax Description
rcp
Specifies a copy operation to a network server using rcp.
tftp
Specifies a TFTP server as the destination of the copy operation.
Command Mode
EXEC
Usage Guidelines
To copy a system image from Flash memory to a network server that is using rcp, use the copy flash rcp EXEC command. To copy a system image from Flash memory to a network server that is using TFTP, use the copy flash tftp command.
You can use the copy of the system image as a backup copy. You can also use it to verify that the copy in Flash memory is the same as in the original file on disk.
The rcp protocol requires that a client send the remote username on each rcp request to the server. When you issue the copy flash rcp command, by default the access server software sends the remote username associated with the current TTY process, if that name is valid. For example, if the user is connected to the access server through Telnet and the user was authenticated through the username command, then the Cisco IOS software sends that username as the remote username.
If the TTY username is invalid, the Cisco IOS software uses the access server host name as the both the remote and local usernames.
Note
To specify that a different remote username be sent to the server, use the ip rcmd remote-username command. rcp copies the system image to the remote server relative to the directory of the remote username, if that server has a directory structure (for example, UNIX systems).
Cautionan account on the destination server. If you do not use the ip rcmd remote-username command to specify the name of a remote user associated with an account on the server, then the remote username associated with the current TTY process must be associated with an account on the server. If there is no username for the current TTY process, then the access server host name must be associated with an account on the server. If the network administrator of the destination server did not establish accounts for the remote username that is used, and if a default remote username is used, this command will not execute successfully.
If you copy the system image to a PC used as a file server, the PC must support the remote shell (rsh) protocol.
Examples
The following example illustrates how to use this command with the tftp keyword:
Router# copy flash tftpIP address of remote host [255.255.255.255]? 172.30.13.110Name of file to copy? igs-kwriting gsxx !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!copy completeThe following example illustrates how to use this command when copying from a particular partition of Flash memory:
Router# copy flash tftpSystem flash partition information:Partition Size Used Free Bank-Size State Copy-Mode1 4096K 2048K 2048K 2048K Read Only RXBOOT-FLH2 4096K 2048K 2048K 2048K Read/Write Direct[ Type ?<number> for partition directory; ? for full directory; q to abort]Which partition? [default = 1]The system will prompt if there are two or more partitions. If the partition entered is not valid, the process terminates. You can enter a partition number, ? for directory display of all partitions, or ?number for directory display of a particular partition. The default is the first partition.
System flash directory, partition 2:File Length Name/status1 3459720 master/igs-bfpx.100-4.3[3459784 bytes used, 734520 available, 4194304 total]Address or name of remote host [ABC.CISCO.COM]?Source file name?The file will be copied from the partition given by the user earlier.
Destination file name [default = source name]?Verifying checksum for 'master/igs-bfpx.100-4.3' (file # 1)... OKCopy 'master/igs-bfpx.100-4.3' from Flash to serveras 'master/igs-bfpx.100-4.3'? [yes/no] yesThe following example shows how to copy a system image from Flash memory to a network server using rcp:
Router# configure terminalRouter#config ip rcmd remote-username netadmin1Ctrl-ZRouter# copy flash rcpSystem flash directory, partition 2:File Length Name/status1 984 junk[1048 bytes used, 8387560 available, 8388608 total]Address or name of remote host [223.255.254.254]?Source file name? junkDestination file name [junk]? junkVerifying checksum for 'junk' (file # 1)... OKCopy 'junk' from Flash to serveras 'junk'? [yes/no]y!!!!!!!!!!!!!!!!!!!!!!!!!!!!!Upload to server doneFlash copy took 0:00:00 [hh:mm:ss]The exclamation points (!) indicate that the copy process is taking place. Each exclamation point (!) indicates that ten packets have been transferred successfully.
The following example illustrates how to use this command with rcp:
Router# copy flash rcpIP address of remote host [255.255.255.255]? 172.30.13.110Name of file to copy? gsxxwriting gsxx !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!copy completeThe following example illustrates how to use this command when copying from a particular partition of Flash memory:
Router# copy flash rcpSystem flash partition information:Partition Size Used Free Bank-Size State Copy-Mode1 4096K 2048K 2048K 2048K Read Only RXBOOT-FLH2 4096K 2048K 2048K 2048K Read/Write Direct[ Type ?<number> for partition directory; ? for full directory; q to abort]Which partition? [default = 1]The system will prompt you if there are two or more partitions. If the partition entered is not valid, the process terminates. You have the option to enter a partition number, ? for directory display of all partitions, or ?number for directory display of a particular partition. The default is the first partition.
System flash directory, partition 2:File Length Name/status1 3459720 master/igs-bfpx.100-4.3[3459784 bytes used, 734520 available, 4194304 total]Address or name of remote host [ABC.CISCO.COM]?Source file name?The file will be copied from the partition given by the user earlier:
Destination file name [default = source name]?Verifying checksum for 'master/igs-bfpx.100-4.3' (file # 1)... OKCopy 'master/igs-bfpx.100-4.3' from Flash to serveras 'master/igs-bfpx.100-4.3'? [yes/no] yesRelated Commands
boot system
copy tftp
copy rcp
ip rcmd remote-usernamecopy mop flash
To copy a system image using MOP into Flash memory, use the copy mop flash EXEC command.
copy mop flash
Syntax Description
This command has no arguments or keywords.
Command Mode
EXEC
Usage Guidelines
The access server prompts for the MOP filename. It provides an option to erase existing Flash memory before writing onto it. The entire copying process takes several minutes and will differ from network to network.
Before booting from Flash memory, verify that the checksum of the image in Flash memory matches the checksum listed in the README file that was distributed with the system software image. The checksum of the image in Flash memory is displayed at the bottom of the screen when you issue the copy mop flash command.
CautionIf the checksum value is not correct according to the value in the README file, do not reboot the access server. Issue the copy mop flash command and compare the checksums again. If the checksum is repeatedly wrong, copy the original system software image back into Flash memory before you reboot the access server from Flash memory. If you have a bad image in Flash memory and try to boot from Flash, and netbooting is not configured, the access server will start the system image contained in ROM. If ROM does not contain a fully functional system image, the access server might not function and will have to be reconfigured through a direct console port connection.
Examples
The following example shows sample output of when copying a system image into a partition of Flash memory:
Router# copy mop flashSystem flash directory:File Length Name/status1 984 junk [deleted]2 984 junk[2096 bytes used, 8386512 available, 8388608 total]Source file name? junkDestination file name [junk]?Erase flash device before writing? [confirm]Flash contains files. Are you sure you want to erase? [confirm]Copy 'junk' from serveras 'junk' into Flash WITH erase? [yes/no]yesErasing device... eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee ...erasedLoading junk from 1234.5678.9abc via Ethernet0: ![OK - 984/8388608 bytes]Verifying checksum... OK (0x14B3)Flash copy took 0:00:01 [hh:mm:ss]The following example shows sample output of copying a system image into a partition of Flash memory. The system will prompt only if there are two or more read/write partitions or one read-only and one read/write partition and dual Flash bank support in boot ROMs. If the partition entered is not valid, the process terminates. You can enter a partition number, ? for directory display of all partitions, or ?number for directory display of a particular partition. The default is the first read/write partition.
Router# copy mop flashSystem flash partition information:Partition Size Used Free Bank-Size State Copy-Mode1 4096K 2048K 2048K 2048K Read Only RXBOOT-FLH2 4096K 2048K 2048K 2048K Read/Write Direct[ Type ?<no> for partition directory; ? for full directory; q to abort]Which partition? [default = 2]If the partition is read-only and has dual Flash bank support in boot ROMs, the session continues as follows:
**** NOTICE ****Flash load helper v1.0This process will accept the copy options and then terminatethe current system image to use the ROM based image for the copy.Routing functionality will not be available during that time.If you are logged in via telnet, this connection will terminate.Users with console access can see the results of the copy operation.---- ******** ----Proceed? [confirm]System flash directory, partition 1:File Length Name/status1 3459720 master/igs-bfpx.100-4.3[3459784 bytes used, 734520 available, 4194304 total]Source file name? master/igs-bfpx-100.4.3Destination file name [default = source name]?The file will be copied into the partition given by the user earlier:
Loading master/igs-bfpx.100-4.3 from 172.30.1.111: !Erase flash device before writing? [confirm]Flash contains files. Are you sure? [confirm]Copy 'master/igs-bfpx.100-4.3' from MOP serveras 'master/igs-bfpx.100-4.3' into Flash WITH erase? [yes/no] yesIf the partition is read-write, the session continues as follows:
System flash directory, partition 2:File Length Name/status1 3459720 master/igs-bfpx.100-4.3[3459784 bytes used, 734520 available, 4194304 total]Source file name? master/igs-bfpx.100-4.3Destination file name [default = source name]?The file will be copied into the partition given by the user earlier:
Loading master/igs-bfpx.100-4.3 from 172.30.1.111: !Erase flash device before writing? [confirm]Flash contains files. Are you sure? [confirm]Copy 'master/igs-bfpx.100-4.3' from MOP serveras 'master/igs-bfpx.100-4.3' into Flash WITH erase? [yes/no] yesRelated Commands
copy rcp
To copy a system image from a network server into Flash memory using rcp, use the copy rcp EXEC commands. The copy rcp running-config command replaces the configure network command. The copy rcp startup-config command replaces the configure overwrite-network command.
copy rcp {flash | running-config | startup-config}
Syntax Description
Command Mode
EXEC
Usage Guidelines
The access server prompts you for the address of the rcp server and rcp filename. It provides an option to erase existing Flash memory before writing onto it. The entire copying process takes several minutes and will differ from network to network.
Before booting from Flash memory, verify that the checksum of the image in Flash memory matches the checksum listed in the README file that was distributed with the system software image. The checksum of the image in Flash memory is displayed at the bottom of the screen when you issue the copy rcp flash command. The README file was copied to the server automatically when you installed the system software image.
CautionIf the checksum value is not correct according to the value in the README file, do not reboot the access server. Issue the copy rcp flash command and compare the checksums again. If the checksum is repeatedly wrong, copy the original system software image back into Flash memory before you reboot the access server from Flash memory. If you have a bad image in Flash memory and try to boot from Flash, and netbooting is not configured, the access server will start the system image contained in ROM. If ROM does not contain a fully functional system image, the access server will not function and will have to be reconfigured through a direct console port connection.
The rcp protocol requires that a client send the remote username of an rcp request to the server. When you issue the copy rcp flash command, by default the software sends the username associated with the current TTY, if that name is valid. For example, if the user is connected to the access server through Telnet and the user was authenticated through the username command, then the Cisco IOS software sends that username as the remote username.
Note
If the TTY remote username is invalid, the Cisco IOS software uses the access server host name as the both the remote and local usernames. To specify that a different remote username be sent to the network server, use the ip rcmd remote-username command. The rcp protocol copies the system image from the remote server relative to the directory of the remote username, if the server has a directory structure (for example, UNIX systems).
Cautionan account on the destination server. If you do not use the ip rcmd remote-username command to specify the name of a remote user associated with an account on the server, then the remote username associated with the current TTY process must be associated with an account on the server. If there is no username for the current TTY process, then the access server host name must be associated with an account on the server. If the network administrator of the destination server did not establish accounts for the remote username used, and if a default remote username is used, this command will not execute successfully.
If you copy the system image from a PC used as a file server, the remote host computer must support the remote shell protocol.
Use the copy rcp flash to copy a system image from a network server to the access server's internal Flash memory using rcp. The access server prompts for the address of the rcp server and rcp filename. When you issue this command, the system provides an option to erase existing Flash memory before writing onto it. The entire copying process takes several minutes and will differ from network to network.
Before booting from Flash memory, verify that the checksum of the image in internal Flash memory matches the checksum listed in the README file that was distributed with the system software image. The checksum of the image in Flash memory is displayed at the bottom of the screen when you issue the copy tftp flash command. The README file was copied to the rcp server automatically when you installed the system software image.
CautionIf the checksum value does not match the value in the README file, do not reboot the access server. Reissue the copy rcp flash command and compare the checksums again. If the checksum is repeatedly wrong, copy the original system software image back into Flash memory before you reboot the access server from Flash memory. If you have a bad image in Flash memory and try to boot from Flash, and booting from a network server is not configured, the access server will start the system image contained in ROM. If ROM does not contain a fully functional system image, the access server will not function and will have to be reconfigured through a direct console port connection.
Use the copy rcp running-config command to copy a configuration file from a network server to the access server's running configuration environment using rcp. You can copy either a host configuration file or a network configuration file. Accept the default value of host to copy and load a host configuration file containing commands that apply to one network server. Enter network to copy and load a network configuration file containing commands that apply to all network servers on a network.
Note
Use the copy rcp startup-config command to copy a host or network configuration file from a network server to the access server's startup configuration environment using rcp. Accept the default value of host to copy and store a host configuration file containing commands that apply to one network server in particular. Enter network to copy and store a network configuration file containing commands that apply to all network servers on a network. The copy rcp startup-config command copies a configuration file from the network server to NVRAM.
Note
Examples
This example copies a system image named IJ01030z from the netadmin1 directory on the remote server named SERVER1.CISCO.COM with an IP address of 131.108.101.101 to the access server's Flash memory. To ensure that enough Flash memory is available to accommodate the system image to be copied, the Cisco IOS software allows you to erase the contents of Flash memory first.
Router# configure terminalcommserver1(config)# rcmd remote-username netadmin1Ctrl-Zcommserver1# copy rcp flashSystem flash directory, partition 2:File Length Name/status1 984 junk [deleted]2 984 junk[2096 bytes used, 8386512 available, 8388608 total]Address or name of remote host [255.255.255.255]? 172.30.254.254Source file name? junkDestination file name [junk]?Accessing file 'junk' on 172.30.254.254...Loading dirt/ssangiah/junk .from 223.255.254.254 (via Ethernet0): ! [OK]Erase flash device before writing? [confirm]Flash contains files. Are you sure you want to erase? [confirm]Copy 'junk' from serveras 'junk' into Flash WITH erase? [yes/no]yesErasing device... eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee ...erasedLoading junk from 172.30.254.254 (via Ethernet0): ![OK - 984/8388608 bytes]Verifying checksum... OK (0x14B3)Flash copy took 0:00:01 [hh:mm:ss]The following example shows sample output when copying a system image into a partition of Flash memory. The system prompts only if there are two or more read/write partitions or one read-only and one read/write partition and dual Flash bank support in boot ROMs. If the partition entered is not valid, the process terminates. You can enter a partition number, ? for directory display of all partitions, or ?number for directory display of a particular partition. The default is the first read/write partition.
Router# copy rcp flashSystem flash partition information:Partition Size Used Free Bank-Size State Copy-Mode1 4096K 2048K 2048K 2048K Read Only RXBOOT-FLH2 4096K 2048K 2048K 2048K Read/Write Direct[ Type ?<no> for partition directory; ? for full directory; q to abort]Which partition? [default = 2]If the partition is read-only and has dual Flash bank support in boot ROM, the session continues as follows:
**** NOTICE ****Flash load helper v1.0This process will accept the copy options and then terminatethe current system image to use the ROM based image for the copy.Routing functionality will not be available during that time.If you are logged in via telnet, this connection will terminate.Users with console access can see the results of the copy operation.---- ******** ----Proceed? [confirm]System flash directory, partition 1:File Length Name/status1 3459720 master/igs-bfpx.100-4.3[3459784 bytes used, 734520 available, 4194304 total]Address or name of remote host [255.255.255.255]? 172.30.1.1Source file name? master/igs-bfpx-100.4.3Destination file name [default = source name]?The file will be copied into the partition given by the user earlier:
Loading master/igs-bfpx.100-4.3 from 172.30.1.111: !Erase flash device before writing? [confirm]Flash contains files. Are you sure? [confirm]Copy 'master/igs-bfpx.100-4.3' from TFTP serveras 'master/igs-bfpx.100-4.3' into Flash WITH erase? [yes/no] yesIf the partition is read-write, the session continues as follows:
System flash directory, partition 2:File Length Name/status1 3459720 master/igs-bfpx.100-4.3[3459784 bytes used, 734520 available, 4194304 total]Address or name of remote host [255.255.255.255]? 172.30.1.1Source file name? master/igs-bfpx.100-4.3Destination file name [default = source name]?The file will be copied into the partition given by the user earlier:
Accessing file 'master/igs-bfpx.100-4.3' on ABC.CISCO.COM...Loading master/igs-bfpx.100-4.3 from 172.30.1.111: !Erase flash device before writing? [confirm]Flash contains files. Are you sure? [confirm]Copy 'master/igs-bfpx.100-4.3' from TFTP serveras 'master/igs-bfpx.100-4.3' into Flash WITH erase? [yes/no] yesThe following example specifies a remote username of netadmin1. Then it copies and runs a host configuration file named host1-confg from the netadmin1 directory on the remote server with an IP address of 172.30.101.101.
Router# configure terminalRouter# ip rcmd remote-username netadmin1Ctrl-ZRouter# copy rcp running-configHost or network configuration file [host]?Address of remote host [255.255.255.255]? 172.30.101.101Name of configuration file [cs-confg]? host1-confgConfigure using host1-confg from 172.30.101.101? [confirm]Connected to 172.30.101.101Loading 1112 byte file host1-confg:![OK]Router#%SYS-5-CONFIG: Configured from host1-config by rcp from 172.30.101.101The following example shows how to copy a configuration file to a Cisco 2500 system using rcp. This example specifies a remote username of netadmin1. Then it copies and stores a host configuration file host2-confg from the netadmin1 directory on the remote server with an IP address of 172.30.101.101:
cs2# configure terminalcs2# ip rcmd remote-username netadmin1Ctrl-Zcs2# copy rcp startup-configHost or network configuration file [host]?Address of remote host [255.255.255.255]? 172.30.101.101Name of configuration file[cs2-confg]? host2-confgConfigure using cs2-confg from 172.30.101.101?[confirm]Connected to 172.30.101.101Loading 1112 byte file cs2-confg:![OK][OK]cs2#%SYS-5-CONFIG_NV:Non-volatile store configured from cs2-config by rcp from 172.30.101.101Related Commands
boot system
copy flash
copy running-config
copy running-config startup-config
copy startup-config rcp
ip rcmd remote-username
verify flashcopy running-config
To copy the running configuration file from the access server to a network server using rcp, use the copy running-config EXEC commands. The copy running-config startup-config command replaces the write memory command. The copy running-config rcp or copy running-config tftp command replaces the write network command.
copy running-config {rcp | startup-config | tftp}
Syntax Description
Command Mode
EXEC
Usage Guidelines
(Cisco 2500 only.) Use the copy running-config {rcp | tftp} command to copy the current configuration file to a network server using rcp or TFTP. The configuration file copy can serve as a backup copy. You are prompted for a destination host and filename.
The rcp protocol requires that a client send the remote username of an rcp request to the server. When you issue the copy running-config rcp command, by default the Cisco IOS software sends the username associated with the current TTY, if that name is valid. For example, if the user is connected to the access server through Telnet and the user was authenticated through the username command, then the Cisco IOS software sends that username as the remote username.
If the TTY username is invalid, the Cisco IOS software uses the access server host name as the both the remote and local usernames.
Note
To specify that a different remote username be sent to the server, use the ip rcmd remote-username command. The rcp software copies the running configuration file to the remote server relative to the directory of the remote username that you specify, if the server has a directory structure (for example, UNIX systems).
CautionThe remote username must be associated with an account on the destination server. If you do not use the ip rcmd remote-username command to specify the name of a remote user associated with an account on the server, then the remote username associated with the current TTY process must be associated with an account on the server. If there is no username for the current TTY process, then the access server host name must be associated with an account on the server. If the network administrator of the destination server did not establish accounts for the remote username that is used, and if a default remote username is used, this command will not execute successfully.
If you copy the configuration file to a personal computer used as a file server, the computer must support the rsh protocol.
To run this command, the access server must contain Flash memory.
The copy running-config startup-config command copies the currently running configuration to NVRAM. Use this command in conjunction with the reload command to restart the access server with the configuration information stored in NVRAM.
If you issue the copy running-config startup-config command from a bootstrap system image, you receive a warning instructing you to indicate whether you want your previous NVRAM configuration to be overwritten and configuration commands lost. This warning does not appear if NVRAM contains an invalid configuration or if the previous configuration in NVRAM was generated by a bootstrap system image.
Example
The following example specifies a remote username of netadmin1. Then it copies the running configuration file, named cs2-confg to the netadmin1 directory on the remote host with an IP address of 172.30.101.101:
cs2# configure terminalcs2# ip rcmd remote-username netadmin1Ctrl-Zcs2# copy running-config rcpRemote host[]? 172.30.101.101Name of configuration file to write [cs2-confg]?Write file cs2-confg on host 172.30.101.101?[confirm]###![OK]Connected to 172.30.101.101cs2#The following is an example of the copy running-config startup-config command and the warning the system provides if you are trying to save configuration information from bootstrap into the system:
cs2(boot)# copy running-config startup-configWarning: Attempting to overwrite an NVRAM configuration writtenby a full system image. This bootstrap software does not supportthe full configuration command set. If you perform this command now,some configuration commands may be lost.Overwrite the previous NVRAM configuration?[confirm]Enter no to escape writing the configuration information to memory.
Related Commands
A dagger (†) indicates that the command is documented in another chapter.
copy rcp running-config
ip rcmd remote-username †
copy rcp startup-config
copy startup-config
reload †copy startup-config
To copy a startup configuration file to a network server using rcp, use the copy startup-config EXEC commands.
copy startup-config {rcp | running-config | tftp}
Syntax Description
Command Mode
EXEC
Usage Guidelines
Use this command to copy the contents of the configuration file in nonvolatile memory to a network server.
The rcp protocol requires that a client send the remote username of an rcp request to the server. When you issue the copy startup-config rcp command, by default the Cisco IOS software sends the username associated with the current TTY, if that name is valid. For example, if the user is connected to the access server through Telnet and the user was authenticated through the username command, then the Cisco IOS software sends that username as the remote username.
If the TTY username is invalid, the Cisco IOS software uses the access server host name as the both the remote and local usernames.
Note
To specify that a different remote username be sent to the server, use the ip rcmd remote-username command. The rcp software copies the system image to the remote server relative to the directory of the remote username, if the server has a directory structure (for example, UNIX systems).
Cautionan account on the destination server. If you do not use the ip rcmd remote-username command to specify the name of a remote user associated with an account on the server, then the remote username associated with the current TTY process must be associated with an account on the server. If there is no username for the current TTY process, then the access server host name must be associated with an account on the server. If the network administrator of the destination server did not establish accounts for the remote username used, and if a default remote username is used, this command will not execute successfully.
If you copy the configuration file to a PC used as a file server, the PC must support the remote shell protocol.
To run this command, the access server must contain Flash memory.
Example
The following example shows how to copy a startup configuration file to a network server using rcp:
Router# configure terminalRouter# ip rcmd remote-username netadmin2Ctrl-ZRouter# copy startup-config rcpRemote host[]? 172.30.101.101Name of configuration file to write [cs2-confg]?Write file cs2-confg on host 172.30.101.101?[confirm]![OK]Related Commands
copy rcp startup-config
copy running-config
ip rcmd remote-usernamecopy tftp
To copy a file from a TFTP server to the access server or to another destination, use one of the following copy tftp EXEC commands. The copy tftp running-config command replaces the configure network command. The copy tftp startup-config command replaces the configure overwrite-network command.
copy tftp {flash | running-config | startup-config}
Syntax Description
Command Mode
EXEC
Usage Guidelines
The access server prompts for the address of the network server and TFTP filename. It provides an option to erase existing Flash memory before writing onto it. The entire copying process takes several minutes and will differ from network to network.
Before booting from Flash memory, verify that the checksum of the image in Flash memory matches the checksum listed in the README file that was distributed with the system software image. The checksum of the image in Flash memory is displayed at the bottom of the screen when you issue the copy tftp flash command. The README file was copied to the network server automatically when you installed the system software image.
CautionIf the checksum value is not correct according to the value in the README file, do not reboot the access server. Issue the copy tftp flash command and compare the checksums again. If the checksum is repeatedly wrong, copy the original system software image back into Flash memory before you reboot the access server from Flash memory. If you have a bad image in Flash memory and try to boot from Flash, and netbooting is not configured, the access server will start the system image contained in ROM (assuming). If ROM does not contain a fully functional system image, the access server will not function and will have to be reconfigured through a direct console port connection.
Note
Example
The following example shows sample output of copying a system image named IJ01030Z into Flash memory:
Router# copy tftp flashSystem flash directory, partition 2:File Length Name/status1 984 junk [deleted]2 984 junk[2096 bytes used, 8386512 available, 8388608 total]Address or name of remote host [255.255.255.255]?172.30.254.254Source file name? junkDestination file name [junk]?Accessing file 'junk' on 172.30.254.254...Loading dirt/ssangiah/junk .from 172.30.254.254 (via Ethernet0): - [OK]Erase flash device before writing? [confirm]Flash contains files. Are you sure you want to erase? [confirm]Copy 'junk' from serveras 'junk' into Flash WITH erase? [yes/no]yesErasing device... eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee ...erasedLoading junk from 223.255.254.254 (via Ethernet0): ![OK - 984/8388608 bytes]Verifying checksum... OK (0x14B3)Flash copy took 0:00:01 [hh:mm:ss]The series of Vs in the sample output indicates that a checksum verification of the image is occurring after the image is written to Flash memory.
The following example shows sample output when copying a system image into a partition of Flash memory. The system will prompt only if there are two or more read/write partitions or one read-only and one read/write partition and dual Flash bank support in boot ROMs. If the partition entered is not valid, the process terminates. You can to enter a partition number, ? for directory display of all partitions, or ?number for directory display of a particular partition. The default is the first read/write partition.
Router# copy tftp flashSystem flash partition information:Partition Size Used Free Bank-Size State Copy-Mode1 4096K 2048K 2048K 2048K Read Only RXBOOT-FLH2 4096K 2048K 2048K 2048K Read/Write Direct[ Type ?<no> for partition directory; ? for full directory; q to abort]Which partition? [default = 2]If the partition is read-only and has dual Flash bank support in boot ROM, the session continues as follows:
**** NOTICE ****Flash load helper v1.0This process will accept the copy options and then terminatethe current system image to use the ROM based image for the copy.Routing functionality will not be available during that time.If you are logged in via telnet, this connection will terminate.Users with console access can see the results of the copy operation.---- ******** ----Proceed? [confirm]System flash directory, partition 1:File Length Name/status1 3459720 master/igs-bfpx.100-4.3[3459784 bytes used, 734520 available, 4194304 total]Address or name of remote host [255.255.255.255]? 131.108.1.1Source file name? master/igs-bfpx-100.4.3Destination file name [default = source name]?The file will be copied into the partition given by the user earlier:
Loading master/igs-bfpx.100-4.3 from 131.108.1.111: !Erase flash device before writing? [confirm]Flash contains files. Are you sure? [confirm]Copy 'master/igs-bfpx.100-4.3' from TFTP serveras 'master/igs-bfpx.100-4.3' into Flash WITH erase? [yes/no] yesIf the partition is read-write, the session continues as follows:
System flash directory, partition 2:File Length Name/status1 3459720 master/igs-bfpx.100-4.3[3459784 bytes used, 734520 available, 4194304 total]Address or name of remote host [255.255.255.255]? 131.108.1.1Source file name? master/igs-bfpx.100-4.3Destination file name [default = source name]?The file will be copied into the partition given by the user earlier:
Accessing file 'master/igs-bfpx.100-4.3' on ABC.CISCO.COM...Loading master/igs-bfpx.100-4.3 from 172.30.1.111: !Erase flash device before writing? [confirm]Flash contains files. Are you sure? [confirm]Copy 'master/igs-bfpx.100-4.3' from TFTP serveras 'master/igs-bfpx.100-4.3' into Flash WITH erase? [yes/no] yesRelated Commands
boot system flash
copy flash tftp
verify flashcopy verify
The verify flash command replaces the copy verify command. Refer to the description of the verify flash command for more information.
erase
To erase a saved configuration, use one of the following erase EXEC commands. The erase startup-config command replaces the write erase command.
erase startup-config
Syntax Description
Command Mode
EXEC
Usage Guidelines
Use the erase startup-config command on all platforms to erase the startup configuration. This command erases the configuration stored in NVRAM.
Example
The following example illustrates how to erase the configuration located in NVRAM :
Gouda#erase startup-configRelated Commands
erase flash
To erase internal Flash memory, use the erase flash EXEC command. This command replaces the copy erase flash command.
erase flash
Syntax Description
This command has no arguments or keywords.
Command Mode
EXEC
Usage Guidelines
This command performs the same action as the copy erase flash command.
Example
The following example illustrates how to use this command. Note that this example reflects the dual Flash bank feature only available on Cisco 2500 series.
Router# erase flashSystem flash partition information:Partition Size Used Free Bank-Size State Copy-Mode1 4096K 2048K 2048K 2048K Read Only RXBOOT-FLH2 4096K 2048K 2048K 2048K Read/Write Direct[ Type ?<no> for partition directory; ? for full directory; q to abort]Which partition? [default = 2]The system will prompt only if there are two or more read/write partitions. If the partition entered is not valid or is the read-only partition, the process terminates. You can enter a partition number, ? for directory display of all partitions, or ?number for directory display of a particular partition. The default is the first read/write partition.
System flash directory, partition 2:File Length Name/status1 3459720 master/igs-bfx.103.1[3459784 bytes used, 734520 available, 4194304 total]Erase flash device, partition 2? [confirm] <Return>ip rarp-server
Use the ip rarp-server interface configuration command to allow the access server to act as a Reverse Address Resolution Protocol (RARP) server. Use the no form of the command to restore the interface to the default of no RARP server support.
ip rarp-server ip-address
no ip rarp-server ip-addressSyntax Description
Default
Disabled
Command Mode
Interface configuration
Usage Guidelines
This feature makes diskless booting of clients possible between network subnets where the client and server are on separate subnets.
RARP server support is configurable on a per interface basis, so that the access server does not interfere with RARP traffic on subnets that do not need RARP assistance from the access server.
The access server answers incoming RARP requests only if both of the following conditions are met:
•
•
Use the show ip arp EXEC command to display the contents of the IP ARP cache.
Sun Microsystems, Inc., makes use of RARP and UDP-based network services to facilitate network-based booting of SunOS on their workstations. By bridging RARP packets and using both the ip helper-address interface configuration command and the ip forward-protocol global configuration command, the access server should be able to perform the necessary packet switching to enable booting of Sun workstations across subnets. Unfortunately, some Sun workstations assume that the sender of the RARP response, in this case the access server, is the host the client can contact to TFTP load the bootstrap image. This causes the workstations to fail to boot.
By using the ip rarp-server feature, the access server can be configured to answer these RARP requests, and the client machine should be able to reach its server by having its TFTP requests forwarded through the access server that acts as the RARP server.
In the case of RARP responses to Sun workstations attempting to diskless boot, the IP address specified in the ip rarp-server interface configuration command should be the IP address of the TFTP server. In addition to configuring RARP service, the access server must also be configured to forward UDP-based Sun portmapper requests to completely support diskless booting of Sun workstations. This can be accomplished using configuration commands of the form:
ip forward-protocol udp 111interface interface nameip helper-address target-addressRFC 903 documents the Reverse Address Resolution Protocol.
Examples
The following partial example configures the access server to act as a RARP server. The access server is configured to use the primary address of the specified interface in its RARP responses.
arp 172.30.2.5 0800.2002.ff5b arpainterface ethernet 0ip address 172.30.3.100 255.255.255.0ip rarp-server 172.30.3.100In the following example, the access server is configured to act as a RARP server, with TFTP and portmapper requests forwarded to the Sun server:
! Allow the communication server to forward broadcast portmapper requestsip forward-protocol udp 111! Provide the communication server with the IP address of the diskless sunarp 172.30.2.5 0800.2002.ff5b arpainterface ethernet 0! Configure the communication server to act as a RARP server, using the Sun Server's IP! address in the RARP response packet.ip rarp-server 172.30.3.100! Portmapper broadcasts from this interface are sent to the Sun Server.ip helper-address 172.30.3.100Related Commands
A dagger (†) indicates that the command is documented in another chapter.
ip forward-protocol †
ip helper-address †ip rcmd domain-lookup
Use the ip rcmd domain-lookup global configuration command to enable DNS security for rcp and rsh. To bypass DNS security for rcp and rsh, use the no form of this command.
ip rcmd domain-lookup
no ip rcmd domain-lookupSyntax Description
This command has no arguments or keywords.
Default
Enabled
Command Mode
Global configuration
Usage Guidelines
If you do not want to use DNS for rcmd queries, but DNS has been enabled with the ip domain-lookup command, use the no ip rcmd domain-lookup command.
This command will turn off DNS lookups for rsh and rcp only. The no ip domain-lookup command takes precedence over the ip rcmd domain-lookup command. If ip domain-lookup is disabled using the no ip domain-lookup command, DNS will be bypassed for rcp and rsh, even if ip rcmd domain-lookup is enabled.
Note
Example
In the following example, DNS security is enabled for rcp and rsh.
ip rcmd domain-lookupRelated Command
A dagger (†) indicates that the command is documented in another chapter.
ip domain-lookup †
ip rcmd rcp-enable
To configure the access server to allow remote users to copy files to and from the access server, use the ip rcmd rcp-enable global configuration command. Use the no rcp-enable command to disable a access server that is enabled for rcp.
ip rcmd rcp-enable
no ip rcmd rcp-enableSyntax Description
This command has no arguments or keywords.
Default
To ensure security, the access server is not enabled for rcp by default.
Command Mode
Global configuration
Usage Guidelines
To allow a remote user to execute rcp commands on the access server, you must also create an entry for the remote user in the local access server's authentication database.
The no ip rcmd rcp-enable command does not prohibit a local user from using rcp to copy system images and configuration files to and from the access server.
To protect against undesirable users copying the system image or configuration files without consent, the access server is not enabled for rcp by default.
Note
Example
The following example shows how to enable the access server for rcp:
ip rcmd rcp-enableRelated Command
ip rcmd remote-host
To allow remote users to execute commands on the access server using rsh or rcp, use the ip rcmd remote-host global configuration command to create an entry for the remote user in a local authentication database. Use the no ip rcmd remote-host command to remove an entry for a remote user from the local authentication database.
ip rcmd remote-host local-username {ip-address | host} remote-username [enable]
no ip rcmd remote-host local-username {ip-address | host} remote-username [enable]Syntax Description
Command Mode
Global configuration
Default
No entries are automatically created in the authentication database.
Usage Guidelines
A TCP connection to a access server is established using an IP address. Using the host name is valid only when you are initiating an rcp or rsh command from a local access server. The host name is converted to an IP address using DNS or host-name aliasing.
To allow a remote user to execute rcp or rsh commands on a local access server, you must create an entry for the remote user in the local access server's authentication database. You must also enable the access server to act as an rsh or rcp server.
To enable the access server to act as an rsh server, issue the ip rcmd rsh-enable command. To enable the access server to act as an rcp server, issue the ip rcmd rcp-enable command. The access server cannot act as a server for either of these protocols unless you explicitly enable the capacity.
A local authentication database, which is similar to a UNIX .rhosts file, is used to enforce security on the access server through access control. Each entry that you configure in the authentication database identifies the local user, the remote host, and the remote user. To permit a remote user of rsh to execute commands in privileged EXEC mode, specify the enable keyword.
The difference between an entry that you configure in the access server authentication database and an entry in a UNIX .rhost file is that because the .rhosts file on a UNIX system resides in the home directory of a local user account, an entry in a UNIX .rhosts file does not need to include the local username. The local username is determined from the user account. To provide equivalent support on a access server, specify the local username along with the remote host and remote username in each authentication database entry that you configure.
For a remote user to be able to execute commands on the access server in its capacity as a server, the local username, host address or name, and remote username sent with the remote client request must match values configured in an entry in the local authentication file.
A remote client host should be registered with DNS. The Cisco IOS software uses DNS to authenticate the remote host's name and address. Because DNS can return several valid IP addresses for a host name, the Cisco IOS software checks the address of the requesting client against all of the IP addresses for the named host returned by DNS. If the address sent by the requester is considered invalid in that it does not match any address listed with DNS for the host name, then the Cisco IOS software will reject the remote-command execution request.
Note that if no DNS servers are configured for the access server, then the access server cannot authenticate the host in this manner. In this case, the Cisco IOS software will send a broadcast request to attempt to gain access to DNS services on another server. If DNS services are not available, you must use the no ip domain-lookup command to disable the access server's attempt to gain access to a DNS server by sending a broadcast request.
If DNS services are not available and, therefore, you bypass the DNS security check, the Cisco IOS software will accept the request to remotely execute a command only if all three values sent with the request match exactly the values configured for an entry in the local authentication file.
Note
Example
The following example allows the remote user netadmin3 on a remote host with the IP address 131.108.101.101 to execute commands on cs1 using the rsh protocol. For rsh, user netadmin3 is allowed to execute commands in privileged EXEC mode.
ip rcmd remote-host cs1 172.30.101.101 netadmin3 enableRelated Commands
A dagger (†) indicates that the command is documented in another chapter.
ip rcmd rcp-enable
ip rcmd rsh-enable
no ip domain-lookup†ip rcmd remote-username
To configure the remote username to be used when requesting a remote copy using rcp, use the ip rcmd remote-username global configuration command. To remove the remote username from the configuration, use the no ip rcmd remote-username command.
ip rcmd remote-username username
no ip rcmd remote-username usernameSyntax Description
Command Mode
Global configuration
Default
If you do not issue this command, the Cisco IOS software sends the remote username associated with the current TTY process for rcp copy commands, if the username is valid. For example, if the user is connected to the access server through Telnet and the user was authenticated through the username command, then the Cisco IOS software sends that username as the remote username.
If the username for the current TTY process is not valid, the Cisco IOS software sends the host name as the remote username. For rcp boot commands, the Cisco IOS software sends the access server host name by default.
Note
Usage Guidelines
The rcp protocol requires that a client send the remote username on an rcp request to the server. Use this command to specify the remote username to be sent to the server for an rcp copy request. All files and images to be copied are searched for or written relative to the directory of the remote user's account, if the server has a directory structure, for example, as do UNIX systems.
Note
CautionThe remote username must be associated with an account on the destination server.
Example
The following example shows how to use this command:
Router# configure terminalRouter(config)# ip rcmd remote-username netadmin1Router(config)# Ctrl-ZRelated Commands
boot network
boot system
copy flash
copy rcp
copy rcp running-config
copy rcp startup-config
copy running-config
copy startup-configip rcmd rsh-enable
To configure the access server to allow remote users to execute commands on the access server using rsh, use the ip rcmd rsh-enable global configuration command. Use the no ip rcmd rsh-enable command to disable a access server that is enabled for rsh.
ip rcmd rsh-enable
no rsh-enableSyntax Description
This command has no arguments or keywords.
Default
To ensure security, the access server is not enabled for rsh by default.
Command Mode
Global configuration
Usage Guidelines
Use this command to enable the access server to receive rsh requests from remote users. In addition to issuing this command, to allow a remote user to execute rsh commands on the access server, you must create an entry for the remote user in the local access server's authentication database.
The no rsh-enable command does not prohibit a local user of the access server from executing a command on other access servers and UNIX hosts on the network using rsh.
Note
Example
The following example shows how to enable the access server as an rsh server:
ip rcmd rsh-enableRelated Command
mop device-code
To identify the type of device sending MOP sysid messages and request program messages, use the mop device-code global configuration command. Use the no form of the command to set the identity to the default value.
mop device-code {cisco | ds200}
no mop device-code {cisco | ds200}Syntax Description
Default
Cisco device code
Command Mode
Global configuration
Usage Guidelines
The sysid messages and request program messages use the identity information indicated by this command.
Example
The following example identifies a DECserver 200 device as sending MOP sysid and request program messages:
mop device-code ds200Related Command
A dagger (†) indicates that the command is documented in another chapter.
mop sysid †
mop retransmit-timer
To configure the length of time the access server waits before retransmitting boot requests to a MOP server, use the mop retransmit-timer global configuration command. Use the no form of the command to reinstate the default value.
mop retransmit-timer seconds
no mop retransmit-timerSyntax Description
seconds
Sets the length of time, in seconds, that the access server waits before retransmitting a message. The value is a number from 1 to 20.
Default
4 seconds
Command Mode
Global configuration
Usage Guidelines
By default, when the access server transmits a request that requires a response from a MOP boot server and the server does not respond, the message will be retransmitted after 4 seconds. If the MOP boot server and access server are separated by a slow serial link, it might take longer than 4 seconds for the access server to receive a response to its message. Therefore, you might want to configure the access server to wait longer than 4 seconds before retransmitting the message if you are using such a link.
Example
In the following example, if the MOP boot server does not respond within 10 seconds after the access server sends a message, the server will retransmit the message:
mop retransmit-timer 10Related Commands
A dagger (†) indicates that the command is documented in another chapter.
mop device-code
mop retries
mop enabled †mop retries
To configure the number of times a access server will retransmit boot requests to a MOP server, use the mop retries global configuration command. Use the no form of the command to reinstate the default value.
mop retries count
no mop retriesSyntax Description
count
Indicates the number of times a access server will retransmit a MOP boot request. The value is a number from 3 to 24.
Default
8 times
Command Mode
Global configuration
Example
In the following example, the access server will attempt to retransmit a message to an unresponsive host 11 times before declaring a failure:
mop retries 11Related Commands
A dagger (†) indicates that the command is documented in another chapter.
mop device-code
mop retransmit-timer
mop enabled †o
To list the value of the boot field (bits 0-3) in the configuration register, use the ROM monitor o command. To reset the value of the boot field so that the access server boots from ROM, use the ROM monitor o/r command.
o
o/rSyntax Description
This command has no arguments or keywords.
Default
Refer to the appropriate hardware installation guide for default values.
Command Mode
ROM monitor
Usage Guidelines
To get to the ROM monitor prompt at a access server, use the reload EXEC command if the configuration register has a boot value of 0. (For systems with a software configuration register, a value can be included on the o/r command line.) Use the i command in conjunction with the o/r command to initialize the access server. (The i command is documented in the hardware installation and maintenance publication for your product.) The o/r command resets the configuration register to 0x141, which disables the Break key, ignores the nonvolatile memory configuration, and boots the default system image from ROM.
Examples
The following is an example of the o command:
> oBit# Configuration register option settings:15 Diagnostic mode disabled14 IP broadcasts do not have network numbers13 Do not boot default ROM software if network boot fails12-11 Console speed is 9600 baud10 IP broadcasts with ones09 Do not use secondary bootstrap08 Break enabled07 OEM disabled06 Ignore configuration disabled03-00 Boot to ROM monitor>The following is an example of the o/r and i commands used to reset and boot the default system image from ROM:
> o/r> iRelated Command
partition flash
To partition Flash memory into two partitions, use the partition flash global configuration command. Use the no form of this command to undo partitioning, and restore Flash memory to one partition.
partition flash partitions [size1 size2]
no partition flashSyntax Description
partitions
Number of partitions in Flash memory. Can be 1 or 2.
size1
(Optional) Size of the first partition in megabytes.
size2
(Optional) Size of the second partition in megabytes.
Default
Flash memory consists of one partition.
If this command is entered but partition size is not specified, two partitions of equal size will be created.
Command Mode
Global configuration
Usage Guidelines
To undo partitioning, use either the partition flash 1 or no partition flash command. If one or more files exist in the second partition, the second partition must be erased manually, using the erase command, before reverting to a single partition.
When creating two partitions, you must not truncate a file or cause the spillover of a file into the second partition.
Example
The following example creates two partitions of 4 MB each in Flash memory:
partition flash 2 4 4reload
To reload the operating system, use the reload EXEC command.
reload
Syntax Description
This command has no arguments or keywords.
Command Mode
EXEC
Usage Guidelines
The reload command halts the system. If the system is set to restart on error, it reboots itself. The reload command is used after configuration information is entered into a file and saved into nonvolatile memory.
You cannot reload from a virtual terminal if the system is not set up for automatic booting. This prevents the system from dropping to the ROM monitor and thereby taking the system out of the remote user's control.
If you modify your configuration file, the system prompts you to save the configuration. During a save operation, the system asks you if you want to proceed with the save if the CONFIG_FILE environment variable points to a startup configuration file that no longer exists. If you say "yes" in this situation, the system goes to setup mode upon reload.
Example
The following example illustrates how to enter the reload command at the privileged EXEC prompt:
Router# reloadRelated Command
rsh
To execute a command remotely on a remote rsh host, use the rsh EXEC command.
rsh {ip-address | host} [/user username] remote-command
Syntax Description
Command Mode
EXEC
Default
If you do not specify the /user keyword and argument, the access server sends a default remote username unless you override the default by configuring a remote username. As the default value of the remote username, the Cisco IOS software sends the remote username associated with the current TTY process, if that name is valid. If the TTY remote username is invalid, the Cisco IOS software uses the access server host name as the both the remote and local usernames.
Note
Usage Guidelines
Use the rsh command to execute commands remotely. The host on which you remotely execute the command must support the remote shell (rsh) protocol, and the .rhosts files on the rsh host must include an entry that permits you to remotely execute commands on that host.
Example
The following example shows how to execute a command remotely on a remote rsh host:
Router# rsh mysys.cisco.com /u sharon ls -a....alias.cshrc.emacs.exrc.history.login.mailrc.newsrc.oldnewsrc.rhosts.twmrc.xsessionjazzRelated Command
service compress-config
To compress configuration files on access servers that are equipped with nonvolatile memory, use the service compress-config global configuration command. To disable compression, use the no form of this command.
service compress-config
no service compress-configSyntax Description
This command has no arguments or keywords.
Default
Disabled
Command Mode
Global configuration
Usage Guidelines
If the file compression completes successfully, the following message is displayed:
Compressing configuration from configuration-size to compressed-size[OK]If the boot ROMs do not recognize a compressed configuration, the following message is displayed:
Boot ROMs do not support NVRAM compression Config NOT written to NVRAMIf the file compression fails, the following message is displayed:
Error trying to compress nvramOne way to determine whether a configuration file will compress enough to fit into nonvolatile memory is to use a text editor to enter the configuration, then use the UNIX compress command to check the compressed size. To get a closer approximation of the compression ratio, use the UNIX command compress -b12.
Once the configuration file has been compressed, the access server functions normally. A show configuration command would uncompress the configuration before displaying it. At boot time, the system would recognize that the configuration file was compressed, uncompress it, and proceed normally.
To disable compression of the configuration file, enter configuration mode and specify the no service compress-config command. Then enter the write memory command. The access server displays an OK message if it is able to successfully write the uncompressed configuration to nonvolatile memory. Otherwise, the access server displays an error message indicating that the configuration is too large to store. If the configuration file is larger than the physical nonvolatile memory, the following message is displayed:
###Configuration too large to fit uncompressed in NVRAM Truncate configuration? [confirm]To truncate and save the configuration, type Y. To not truncate and not save the configuration, type N.
Example
In the following example, the configuration file is compressed:
service compress-configRelated Command
service config
To enable automatic loading of configuration files from a network server, use the service config global configuration command. Use the no form of the command to restore the default.
service config
no service configSyntax Description
This command has no arguments or keywords.
Default
Disabled, except on systems without nonvolatile memory or with invalid or incomplete information in nonvolatile memory. In these cases, autoloading of configuration files from a network server is enabled automatically.
Command Mode
Global configuration
Usage Guidelines
Usually, the service config command is used in conjunction with the boot host or boot network command. You must enter the service config command to enable the access server to automatically configure the system from the file specified by the boot host or boot network command.
The service config command can also be used without the boot host or boot network command. If you do not specify host or network configuration filenames, the access server uses the default configuration files. The default network configuration file is network-confg. The default host configuration file is host-confg, where host is the host name of the access server. If the access server cannot resolve its host name, the default host configuration file is cs-confg.
Example
In the following example, the access server is configured to automatically load the default host configuration file:
boot hostservice configRelated Commands
show async bootp
Use the show async bootp privileged EXEC command to display the parameters that have been configured for SLIP extended BOOTP requests.
show async bootp
Syntax Description
This command has no arguments or keywords.
Command Mode
Privileged EXEC
Sample Display
The following is a sample output of the show async bootp command:
Router# show async bootpThe following extended data will be sent in BOOTP responses:bootfile (for address 172.30.1.1) "pcboot"bootfile (for address 1172.30.1.111) "dirtboot"subnet-mask 255.255.0.0time-offset -3600time-server 172.30.1.1describes significant fields shown in the display.
Table 3-3 Show Async BOOTP Field Descriptions
Related Command
show configuration
The show startup-config command replaces this command. Refer to the description of the
show startup-config command for more information.show flash
Use the show flash EXEC command to verify Flash memory. The show flash command displays the type of Flash memory present, any files that might currently exist in Flash memory, and the amounts of Flash memory used and remaining.
show flash [all | chips | detailed | err | partition number [all | chips | detailed | err] |
summary]Syntax Description
Command Mode
EXEC
Sample Display
The following is sample output from the show flash command on the Cisco 2500 series:
Router# show flashSystem flash directory:File name/status0 ahp4/igs-bfpx.9407051 micro/eip1-02 micro/sp1-33 micro/trip1-14 micro/hip1-05 micro/fip1-16 fsipucode7 spucode8 tripucode9 fipucode10 eipucode11 hipucode12 sipucode13 sp_q160-114 ahp4/sp160-3 [deleted]15 ahp4/sp160-3[4008468 bytes used, 185836 bytes available]describes the show flash display fields for the Cisco 2500 series.
Table 3-3 Show Flash Field Descriptions
As the display shows, the Flash memory can store and display multiple, independent software images for booting itself or for TFTP server software for other products. This feature is useful for storing default system software. These images can be stored in compressed format (but cannot be compressed by the access server).
To eliminate any files from Flash (invalidated or otherwise) and free up all available memory space, the entire Flash memory must be erased; individual files cannot be erased from Flash memory.
The following is a sample output from the show flash all command on the Cisco 2500 Series. The format of your display might differ.
Router# show flash allSystem flash directory:File name/statusaddr length fcksum ccksum1 achopra/igs-bfpx.9407050x40 4008404 0x35B3 0x35B3[4008468 bytes used, 185836 bytes available]4096K bytes of processor board System flash. (Read only mode)System flash chips could not be identified.Check the Vpp (12V) jumper installation (if present)and/or the chips/SIMMs installed.Flash chips supported by system :Code Chip-Sz Cmd-grp Chip-name89B4 0x20000 1 INTEL 28F01089BD 0x40000 1 INTEL 28F02001A7 0x20000 1 AMD 28F010012A 0x40000 1 AMD 28F0201CD0 0x40000 1 M5M 28F101P89A2 0x100000 2 INTEL 28F008SAdescribes the show flash all display fields for the Cisco 2500 series.
Table 3-4 Show Flash All Field Descriptions
Note
The following is sample output from the show flash command on the Cisco 2500 series:
Router# show flashSystem flash directory:File name/status0 ahp4/igs-bfpx.9407051 micro/eip1-02 micro/sp1-33 micro/trip1-14 micro/hip1-05 micro/fip1-16 fsipucode7 spucode8 tripucode9 fipucode10 eipucode11 hipucode12 sipucode13 sp_q160-114 ahp4/sp160-3 [deleted]15 ahp4/sp160-3[4008468 bytes used, 185836 bytes available]describes the show flash display fields.
Table 3-5 Show Flash Field Descriptions
As the display shows, the Flash memory can store and display multiple, independent software images for booting itself or for TFTP server software for other products. This feature is useful for storing default system software. These images can be stored in compressed format (but cannot be compressed by the access server).
To eliminate any files from Flash memory (invalidated or otherwise) and free up all available memory space, the entire Flash memory must be erased; individual files cannot be erased from Flash memory.
The following is a sample output from the show flash command on a access server that has Flash memory partitioned:
Router# show flashSystem flash directory, partition 1:File Length Name/status1 3459720 master/igs-bfpx.100-4.3[3459784 bytes used, 734520 available, 4194304 total]4096K bytes of processor board System flash (Read Only)System flash directory, partition 2:File Length Name/status1 3459720 igs-kf[3459784 bytes used, 734520 available, 4194304 total]4096K bytes of processor board System flash (Read/Write)In the following example, the security jumper is not installed and you cannot write to Flash memory until the security jumper is installed:
Router> show flash all4096K bytes of flash memory on embedded flash (in RP1).security jumper(12V) is not installed,flash memory is read-only.file offset length name0 0xDCD0 1903892 igs-k [deleted]1 0x1DEA24 1903912 igs-k[329908/4194304 bytes free]describes the additional fields in the display.
Table 3-6 Show Flash All Fields for Partitioned Flash Memory
The following is sample output for the show flash chips command on a access server that has Flash memory partitioned.
Router# show flash chipsSystem flash partition 1:4096K bytes of processor board System flash (Read ONLY)Chip Bank Code Size Name1 1 89A2 1024KB INTEL 28F008SA2 1 89A2 1024KB INTEL 28F008SA3 1 89A2 1024KB INTEL 28F008SA4 1 89A2 1024KB INTEL 28F008SAExecuting current image from System flash [partition 1]System flash partition 2:4096K bytes of processor board System flash (Read/Write)Chip Bank Code Size Name1 2 89A2 1024KB INTEL 28F008SA2 2 89A2 1024KB INTEL 28F008SA3 2 89A2 1024KB INTEL 28F008SA4 2 89A2 1024KB INTEL 28F008SAThe following is sample output for the show flash detailed command on a access server that has Flash memory partitioned.
Router# show flash detailedSystem flash directory, partition 1:File Length Name/statusaddr fcksum ccksum1 3224008 igs-kf.1000x40 0xEE91 0xEE91[3224072 bytes used, 970232 available, 4194304 total]4096K bytes of processor board System flash (Read/Write)System flash directory, partition 2:File Length Name/statusaddr fcksum ccksum1 3224008 igs-kf.1000x40 0xEE91 0xEE91[3224072 bytes used, 970232 available, 4194304 total]4096K bytes of processor board System flash (Read/Write)The following is sample output for the show flash summary command on a access server that has Flash memory partitioned. The partition that indicates a state of "Read Only" is the partition that is being executed from.
Router# show flash summarySystem flash partition information:Partition Size Used Free Bank-Size State Copy-Mode1 4096K 2048K 2048K 2048K Read Only RXBOOT-FLH2 4096K 2048K 2048K 2048K Read/Write DirectThe following are possible values for Copy-Mode:
•
•
•
•
show flh-log
To view the system console output generated during the Flash load helper operation, use the show flh-log privileged EXEC command.
show flh-log
Syntax Description
This command has no arguments or keywords.
Command Mode
Privileged EXEC
Usage Guidelines
If you are a remote Telnet user performing the Flash upgrade without a console connection, this command allows you to retrieve console output when your Telnet connection has terminated due to switching to the ROM image. The output indicates what happened during the download, and is particularly useful if the download fails.
Sample Display
The following is sample output from the show flh-log command:
Router# show flh-log%FLH: abc/igs-kf.103 from 172.30.1.111 to flash ...System flash directory:File Length Name/status1 2251320 abc/igs-kf.103[2251384 bytes used, 1942920 available, 4194304 total]Accessing file 'abc/igs-kf.103' on 172.30.1.111...Loading from 172.30.13.111:Erasing device... ... erasedLoading from 131.108.13.111:!!.!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! [OK -2251320/4194304 bytes]Verifying checksum... OK (0x97FA)Flash copy took 79292 msecs%FLH: Re-booting system after downloadLoading abc/igs-kf.103 at 0x3000040, size = 2251320 bytes [OK]F3: 2183364+67924+259584 at 0x3000060Restricted Rights LegendUse, duplication, or disclosure by the Government issubject to restrictions as set forth in subparagraph(c) of the Commercial Computer Software - Restricted--More--Rights clause at FAR sec. 52.227-19 and subparagraph(c) (1) (ii) of the Rights in Technical Data and ComputerSoftware clause at DFARS sec. 252.227-7013.cisco Systems, Inc.170 West Tasman DriveSan Jose, California 95134Cisco Internetwork Operating System SoftwareCisco IOS (tm) GS Software (GS7), Version 10.3Copyright (c) 1986-1995 by cisco Systems, Inc.Compiled Tue 06-Dec-94 14:01 by smithImage text-base: 0x00001000, data-base: 0x005A9C94cisco 2500 (68030) processor (revision 0x00) with 4092K/2048K bytes ofmemory.Processor board serial number 00000000DDN X.25 software, Version 2.0, NET2 and BFE compliant.ISDN software, Version 1.0.Bridging software.Enterprise software set supported. (0x0)1 Ethernet/IEEE 802.3 interface.2 Serial network interfaces.--More--1 ISDN Basic Rate interface.32K bytes of non-volatile configuration memory.4096K bytes of processor board System flash (Read ONLY)Related Command
show running-config
To display the configuration information currently running on the terminal, use the show running-config EXEC command. This command replaces the write terminal command.
show running-config
Syntax Description
This command has no arguments or keywords.
Command Mode
EXEC
Usage Guidelines
Use this command in conjunction with the show startup-config command to compare the information in running memory to the information stored in NVRAM.
Example
The following example illustrates how to display the running configuration:
show running-configRelated Commands
configure
copy running-config startup-config
show startup-configshow startup-config
To display the contents of NVRAM (if present and valid), use the show startup-config EXEC command. This command replaces show configuration command.
show startup-config
Syntax Description
This command has no arguments or keywords.
Command Mode
EXEC
Usage Guidelines
NVRAM stores the configuration information on the network server in text form as configuration commands. The show startup-config command shows the version number of the software used when you last executed the copy running-config startup-config command.
Sample Displays
The following is sample output from the show startup-config command. It shows the access server displaying the contents of NVRAM.
Router# show startup-configUsing 5057 out of 32768 bytes!version 10.3!enable-password xxxxservice pad!boot system dross-system 131.108.13.111boot system dross-system 131.108.1.111!exception dump 131.108.13.111!no ip ipname-lookup!decnet routing 13.1decnet node-type areadecnet max-address 1023!interface Ethernet 0ip address 131.108.1.1 255.255.255.0ip helper-address 131.120.1.0ip accountingip gdpdecnet cost 3!ip domain-name CISCO.COMip name-server 255.255.255.255!endRelated Commands
A dagger (†) indicates that the command is documented in another chapter.
configure
description †
service compress-config
copy running-config startup-config
show running-configshow version
Use the show version EXEC command to display the configuration of the system hardware, the software version, the names and sources of configuration files, and the boot images.
show version
Syntax Description
This command has no arguments or keywords.
Command Mode
EXEC
Sample Display
The following is sample output from the show version command from a Cisco 2500 series:
Router> show version3000 Software (IGS-BFPX), Version 10.2Copyright (c) 1986-1994 by cisco Systems, Inc.Compiled Tue 05-Jul-94 16:14System Bootstrap, Version (3.3), SOFTWAREcs1 uptime is 6 days, 20 hours, 46 minutesSystem restarted by reloadSystem image file is "achopra/igs-bfpx.940705", booted via flashcisco 2500 (68030) processor (revision A) with 1024K/1024K bytes of memory.Processor board serial number 01244583X.25 software, Version 2.0, NET2, BFE and GOSIP compliant.Bridging software.SuperLAT software (copyright 1990 by Meridian Technology Corp).Authorized for Enterprise software set. (0x0)1 Ethernet/IEEE 802.3 interface.2 Serial network interfaces.16 terminal lines.32K bytes of non-volatile configuration memory.4096K bytes of processor board System flash. (Read only mode)Configuration register is 0x0describes significant fields shown in the display.
Table 3-7 Show Version Field Descriptions
The output of the show version EXEC command can also provide certain messages, such as bus error messages. If such error messages appear, report the complete text of this message to your technical support specialist.
tftp-server
To specify that the access server operate as a TFTP server, use the tftp-server global configuration command. This command replaces the tftp-server system command. To remove a previously defined filename, use the no tftp-server system command with the appropriate filename and, optionally, the IP access list number.
tftp-server flash [partition-number:]filename1 [alias filename2] [access-list-number]
tftp-server rom alias filename2 [access-list-number]
no tftp-server {flash [partition-number:]filename1 | rom alias filename2}
Syntax Description
Default
Disabled
Command Mode
Global configuration
Usage Guidelines
You can specify multiple filenames by repeating the tftp-server command. The system sends a copy of the system image contained in ROM or one of the system images contained in Flash memory to any host that issues a TFTP read request with this filename.
If the specified filename1 or filename2 exists in Flash memory, a copy of the Flash image is sent. On systems that contain a complete image in ROM, the system sends the ROM image if the specified filename1 or filename2 is not found in Flash memory.
Images that run from ROM cannot be loaded over the network. Therefore, it does not make sense to use TFTP to offer the ROMs on these images.
Examples
In the following example, the system uses TFTP to send a copy of the version-10.3 file located in Flash memory in response to a TFTP Read Request for that file. The requesting host is checked against access list 22.
tftp-server flash version-10.3 22In the following example, the system uses TFTP to send a copy of the ROM image flash:2:igs-bpx-1 in response to a TFTP Read Request for the flash:2:igs-bpx-l file:
tftp-server rom alias gs3-k.101Related Command
A dagger (†) indicates that the command is documented in another chapter.
access-list†
verify flash
To verify the checksums of files in Flash memory, use the verify flash EXEC command. This command replaces the copy verify command.
verify flash
Syntax Description
This command has no arguments or keywords.
Command Mode
EXEC
Usage Guidelines
Each system software or microcode image that is distributed on disk uses a single checksum for the entire image. This checksum is displayed only when the image is copied into Flash memory; it is not displayed when the image file is copied from one disk to another.
The README file (which is included with the image on the disk) lists the name, file size, and checksum of the image. Review the contents of the README file before loading or duplicating the new image so that you can verify the checksum when you copy it into the Flash memory or onto a TFTP server.
To display the contents of Flash memory, use the show flash command. The Flash content listing does not include the checksum of individual files. To recompute and verify the image checksum after the image file is copied into Flash memory, use the verify command. When you enter the command, the screen prompts you for the filename to verify. By default, it prompts for the last file in Flash (most recent). Press Return to recompute the default file checksum, or enter the filename of a different file at the prompt.
Examples
The following example illustrates how to use this command:
Router# verify flash Name of file to verify [gsxx]? Verifying via checksum... vvvvvvvvvvvvvvvvvvvvvvvvvvvvv Flash verification successful. Length = 1923712, checksum = 0xA0C1 Router#The following example illustrates how to use the verify flash command when more than one Flash memory partition exists:
Router# verify flashSystem flash partition information:Partition Size Used Free Bank-Size State Copy-Mode1 4096K 2048K 2048K 2048K Read Only RXBOOT-FLH2 4096K 2048K 2048K 2048K Read/Write Direct[Type ?<no> for partition directory; ? for full directory; q to abort]The system will prompt only if there are two or more read/write partitions. If the partition entered is not valid, the process terminates. You can enter a partition number, a question mark (?) for a directory display of all partitions, or a question mark and a number (?number) for directory display of a particular partition. The default is the first partition.
File Length Name/status1 3459720 master/igs-bfpx.100-4.3[3459784 bytes used, 734520 available, 4194304 total]Name of file to verify? master/igs-bfpx.100-4.3Verifying checksum for 'master/igs-bfpx.100-4.3' (file # 1)... OKwrite erase
The erase startup-config command replaces this command. Refer to the description of the erase command for more information on erase startup-config.
write memory
The copy running-config startup-config command replaces this command. Refer to the description of the copy running-config command for more information on copy running-config startup-config.
write network
The copy running-config rcp or copy running-config tftp command replaces this command. Refer to the description of the copy running-config command for more information on copy running-config rcp or copy running-config tftp.write terminal
The show running-config command replaces this command. Refer to the description of
show running-config for more information.
