Release Notes for Cisco IOS Release 11.2(3) Software Feature Packs--Cisco 2500 Series Routers

March 17, 1997

These release notes identify the Cisco Internetwork Operating System (Cisco IOS) Release 11.2 feature packs for Cisco 2500 series routers (Cisco and CiscoPro models). Product numbers for supported feature packs are as follows:

• CD25-C-11.2= ( Cisco 2500 IP Feature Pack)

• CD25-CP/E-11.2= (Cisco 2500 IP Plus Feature Pack)

• CD25-CW-11.2= (Cisco 2500 IP Plus 40 Feature Pack)

• CD25-CY-11.2= (Cisco 2500 IP Plus 56 Feature Pack)

• CD25-B-11.2= (Cisco 2500 IP/IPX/AT/DEC Feature Pack)

• CD25-BP-11.2= (Cisco 2500 IP/IPX/AT/DEC Plus Feature Pack)

• CD25-BW-11.2= (Cisco 2500 IP/IPX/AT/DEC Plus 40 Feature Pack)

• CD25-BY-11.2= (Cisco 2500 IP/IPX/AT/DEC Plus 56 Feature Pack)

• CD25-A-11.2= (Cisco 2500 Enterprise Feature Pack)

• CD25-AP-11.2= (Cisco 2500 Enterprise Plus Feature Pack)

• CD25-AW-11.2= (Cisco 2500 Enterprise Plus 40 Feature Pack)

• CD25-AY-11.2= (Cisco 2500 Enterprise Plus 56 Feature Pack)

These release notes include tables that identify feature packs and tables that show the specific features comprising available feature sets for each supported Cisco router. These release notes also help you navigate the electronic documentation for Cisco IOS Release 11.2 documentation. The Cisco Router Software Loader, delivered on the same CD-ROM as the Cisco IOS feature sets, is designed to work from a PC running Microsoft Windows 95. These release notes also describe how to install the router software feature sets using a PC running Microsoft Windows 3.1.

These release notes contain the following sections:

• Platforms Supported

• Loading Cisco IOS Release 11.2 Software on CiscoPro Routers

• Cisco Feature Pack Descriptions

• Memory Requirements and Recommendations

• Installation Tips

• Cisco IOS Release 11.2 Feature Sets

• Installing the Router Software Using Microsoft Windows 3.1

• Additional Release Note Information

• About Cisco IOS Software Electronic Documentation

• Cisco Connection Online

Platforms Supported

The Cisco Router Software Loader supports the following Cisco 2500 series routers:

• CiscoPro CPA2501, CPA2502, CPA2503, CPA2504, CPA2505, CPA2507, CPA2509, CPA2511, CPA2513, CPA2514, CPA2516, CPA2520, CPA2521, CPA2522, CPA2523, and CPA2524

• Cisco 2501, 2502, 2503, 2504, 2505, 2507, 2509, 2511, 2513, 2514, 2516, 2520, 2521, 2522, 2523, and 2524

Loading Cisco IOS Release 11.2 Software on CiscoPro Routers

The Router Software Loader contains an upgrade utility that permanently modifies a CiscoPro router so that it will accept the Cisco IOS Release 11.2 software images.

The utility changes the router's SysObjectID SNMP MIB (used for network management) from CiscoPro to that of a Cisco router. The software banner also changes so that it no longer identifies the router as a CiscoPro product.

If this happens, log into the router via the console port with Telnet or terminal emulation software. At the prompt ("rommon 1>" or ">"), enter the b flash command. The router will reboot to the new image in Flash memory.

Cisco Feature Pack Descriptions

This section describes the Cisco feature packs, listing the software feature sets comprising each pack. You can use this information to identify your feature pack set in conjunction with the corresponding information provided in the tables in the section "Cisco IOS Release 11.2 Feature Sets,". Tables in that section identify which features are supported for a feature set on a specific platform.

Software Feature Packs

Table 1 identifies each feature pack as specified on the label of the CD containing the router software. It also lists the feature sets comprising the feature pack, giving the DOS and UNIX filenames of the images. The table provides a brief description of each feature set and the router platform on which the feature set runs.

Memory Requirements and Recommendations

This section includes two tables: Table 2 identifies the memory required to run each feature set; Table 3 describes the memory delivered by default and the available memory upgrades.

You can use Table 2 to identify the memory required for your configuration based on the image you run. You can then check this against Table 3 to determine how much memory is available on the router as the factory default and the upgrades that you can obtain to satisfy your requirements.

Table 3 shows the amount of both Flash and main memory delivered by default on a Cisco 2500 series router. It also lists the available memory upgrades.

Installation Tips

This section describes several solutions to problems you might encounter when using the Router Software Loader. These solutions are additions to the loader's online help.

Recovering From a Connection Error

This installation tip provides a possible recovery solution in the event that you are unable to connect to your router. You can skip this section unless you are experiencing a connection error.

In some cases, you might receive the following error message while connecting to the target router:

"Failed to configure the router to enable the Cisco IOS software image and configuration file upload and download operations. You may want to check the router to make sure that the selected interface exists."

If you encounter this message, try increasing the Short Timeout value in the Options dialog box, especially if one of the following situations applies:

• You are connecting to a router that requires the Token Ring interface to be configured. It sometimes takes the Token Ring interface longer to come up than the default Short Timeout value of 15 seconds. Try increasing the Short Timeout to 25 seconds.

• You are connecting to a router that has a large configuration file. Large configuration files may take longer than the default Short Timeout value of 15 seconds to be written to nonvolatile random-access memory.

• You are connecting to a Cisco AS5200. A Cisco AS5200 requires up to 45 seconds to write a configuration to nonvolatile random-access memory, due to the amount of interfaces that must be checked during this process. Increase the Short Timeout value to 50 seconds.

Enabling the Hub Port

This installation tip applies to the Cisco 2505, 2507, 2516, CPA2505, CPA2607, and CPA2516. When connecting to one of these routers via the Router Software Loader, you must first enable the hub port used to connect the router to your PC. To enable the hub port, you will need to log into the router via the console port. You can log into the console port using Telnet or terminal emulation software. (If you use terminal emulation software, configure the software settings to 9600 baud, no parity, 8 data bits, and 1 stop bit.)

An example of enabling the hub port follows:

Step 1 When the router boots up, enter the enable mode as follows:

router> enable
password: <password>
router#

Step 2 Enter the configuration mode and enable the hub port, as follows:

router# configure terminal

Step 3 Enter the following configuration commands, one per line and end with Ctrl-Z.

router(config)# hub ether 0 port number of PC connection
router(config-hub)# no shutdown

Step 4 Exit the configuration mode by entering the commands as follows:

router(config-hub)# exit
router(config)# exit
router#

Step 5 Log out of the router and start the Router Software Loader application.

RFF Platforms (Cisco 1600 Series, 2500 Series, CPA1600 Series, CPA2500 Series) with Partitioned Flash Memory

The following installation tip applies to any Cisco 1600 series or Cisco 2500 series router that has two or more Flash memory partitions. If you are unsure whether your router has multiple Flash memory partitions, issue the show flash command at the router prompt as shown in Step 4 of this section.

The Router Software Loader always copies to the default Flash memory partition of the router. In most cases, the default partition is partition 1. However, if your run-from-flash (RFF) router is running a Flash image located in partition 1, the default partition is partition 2. In this case, the Router Software Loader will copy the new image to partition 2, and reload the router with the image that still resides in partition 1.

We recommend that you unpartition your Flash memory before using the Router Software Loader to upgrade your router's Cisco IOS image.

To unpartition your Flash memory, take the following steps:

Step 1 Log into the router via the console port using Telnet or terminal emulation software. (If you use terminal emulation software, configure the software settings to 9600 baud, no parity, 8 data bits, and 1 stop bit.)

Step 2 When the router boots up, enter the enable mode, as follows:

router> enable
password: <password>
router#

Step 3 Erase the contents of the Flash memory partition except the one currently in use (this partition will be in the Read ONLY state in the partition listing), as shown below.

router# erase flash
Partition Size Used Free Bank-Size State Copy Mode
1 8192K 3724K 4467K 8192K Read ONLY RXBOOT-manual
2 8192K 3724K 4467K 8192K Read/Write Direct

System flash directory, partition 2:
File Length Name/status
1 3813972 cpa25-y-l.111-6.1
[3814036 bytes used, 4574572 available, 8388608 total]

Erase flash device, partition 2? [confirm]
Are you sure? [yes/no]: y
Erasing device... eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee ...erased

router#


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Note If you have more than two Flash memory partitions, you must perform the previous step for each of the partitions to be erased.

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Step 4 Enter the show flash command to verify that the desired Flash memory partitions have been erased:

Preserving the Router's Startup Configuration

As part of the connection procedure, the Router Software Loader writes the current running configuration of the router to the startup configuration in NVRAM. This operation overwrites the previous startup configuration file.

Refer to the following steps to determine the operation mode of your particular router, and then how to reboot the router to run the image in Flash memory:

Step 1 After logging into the router, observe the command prompt.

Step 7 Enter the following configuration commands, one per line and end with Ctrl-Z:

Cisco IOS Release 11.2 Feature Sets

This section identifies specific features supported on Cisco 2500 series routers. Table 4 lists feature sets that are identical to their Cisco counterparts. Features marked with "yes" are supported; features marked with "-" are not supported. Features marked with "Plus" are offered only in the Plus feature sets, not in the basic feature set. Features marked with "Encrypt," indicate the addition of 40-bit (Plus 40) or 56-bit (Plus 56) data encryption feature sets. You can use the information given in the tables provided in this section in conjunction with the information provided in the section "Cisco Feature Pack Descriptions,", to determine which features a particular feature set supports.

Installing the Router Software Using Microsoft Windows 3.1

In addition to the Cisco IOS feature sets, the CD-ROM also contains the Router Software Loader, which you can use to download the software to the router. The booklet included with the CD-ROM explains how to install the software on a PC running Windows 95, but you can also install the software using Windows 3.1.

This section describes how to install the software images from the CD-ROM using a PC running Windows 3.1. The process requires that you first obtain a Trivial File Transfer Protocol (TFTP) application or a remote copy protocol (rcp) application, which you can use to set up your PC as a TFTP server or an rcp server. You can use either the copy tftp flash or copy rcp flash command to download the software images to the router from a system running Windows 3.1.

Installation Process

This section provides steps that enable you to install the router software using a TFTP application and a PC running Windows 3.1.

To install the software using an rcp application, follow the same steps but use rcp instead of TFTP. You must also substitute the copy rcp flash command for the copy tftp flash command in Step 8. See the next section, "Command Reference Information for TFTP and rcp," for detailed information about the copy rcp flash and copy tftp flash commands.

Step 1 Install any TFTP application on the PC. (Not provided by Cisco.)

Step 2 Launch the TFTP application on the PC, usually by double-clicking the application icon or its filename.

Step 3 Set up the PC as a TFTP server using the TFTP application setup or configuration facility.

The user interface of most TFTP applications includes a setup facility that allows you to specify the PC as a server. For example, from the TFTP menu of one application, you can select Settings to display a panel that includes a checkbox beside the word Server. To configure the local PC as a server, click in this checkbox.

Step 4 Establish a console session from your local PC (which is now configured as a TFTP server) to the router. You can do this in two ways:

This is the recommended method. If you use this method, you will remain connected to the router when you reload the router to cause the image to take effect (in Step 13).

• Establish a Telnet session from the PC to the router. If you use this method, you will lose your connection to the router when you reload the router to cause the image to take effect (in Step 13).

Step 5 Connect your PC's Ethernet port to the router's Ethernet port using the 10BaseT crossover cable provided.

---

Note Use straight-through cables if you are connecting through a 10BaseT hub.

---

In the following steps, you will upgrade your CiscoPro router to a Cisco Enterprise router. If you have a CiscoPro CPA1000, CPA1600, CPA2500 or CPA4500 router and plan to install an 11.2 image on the router, you must perform Step 6 through Step 13. These steps upgrade your router to allow Enterprise images to run on it. Refer to the Note on page 3 for details.

Step 6 From the console, enter the following configuration command:

Step 8 At the router prompt, enter the following command to copy the router upgrade utility from the CD-ROM drive of the PC to the router:

The exclamation point (!) indicates that the copy process is taking place. Each exclamation point indicates that ten packets have been transferred successfully. A series of "V" characters indicates that a checksum verification of the image is occurring after the image is written to Flash memory.

Step 13 Enter the reload command to reload the router:

Step 15 When prompted, enter the IP address of your local Microsoft Windows 3.1-based PC as in the following example:

The exclamation point (!) indicates that the copy process is taking place. Each exclamation point (!) indicates that ten packets have been transferred successfully. A series of "V" characters indicates that a checksum verification of the image is occurring after the image is written to Flash memory.

Command Reference Information for TFTP and rcp

This section includes detailed information about the copy rcp flash and copy tftp flash commands. This information supplements the information provided in the steps described in the section "Installation Process,".

copy rcp flash

To copy a file from a network server to the router or to another destination using rcp, use the copy rcp flash EXEC command:

Syntax Description

Command Mode

EXEC

Usage Guidelines

The rcp protocol requires that a client send the remote username of an rcp request to the server. When you enter the copy rcp flash command, by default the Cisco IOS software sends the username associated with the current teletype (TTY), if that name is valid. For example, if the user is connected to the router through Telnet and the user was authenticated through the username command, then the software sends that username as the remote username.

If the TTY username is invalid, the software uses the host name as the both the remote and local usernames. To specify a different remote username to be sent to the rcp server, use the ip rcmd remote-username command. You can also specify the path of an existing directory along with the remote username.

If you copy a system image from a PC used as a file server, the remote host computer must support the remote shell (rsh) protocol.

Use the copy rcp flash command to copy a system image from a network server to the router's internal Flash memory using rcp. The Cisco IOS software prompts for the address of the rcp server and rcp filename. When you enter this command, the system provides an option to erase existing Flash memory before writing onto it. The entire copying process takes several minutes and differs 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 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 rcp server automatically when you installed the system software image.

 
Caution If the checksum value does not match the value in the README file, do not reboot the router. Re-enter 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 router from Flash memory. If you have a corrupted image in Flash memory and try to boot from Flash memory, the router starts the system image contained in ROM (assuming booting from a network server is not configured). If ROM does not contain a fully functional system image, the router cannot function and must be reconfigured through a direct console port connection.

Examples

The following example shows how to use the copy rcp flash command on a Cisco 4500 router. The interface might differ slightly on other systems. This example copies a system image named file1 from the netadmin1 directory on the remote server named SERVER1.CISCO.COM with an IP address of 131.108.101.101 to 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.

Router1# configure terminal
Router1(config)# rcmd remote-username netadmin1
Router(config)# Ctrl-Z
Router# copy rcp flash 

System flash directory, partition 2:
File  Length   Name/status
  1   984      file1 [deleted]
  2   984      file1
[2096 bytes used, 8386512 available, 8388608 total]
Address or name of remote host [255.255.255.255]? 131.108.101.101
Source file name? file1
Destination file name [file1]?
Accessing file 'file1' on 131.108.101.101...
Loading dirt/ssangiah/file1 .from 131.108.101.101 (via Ethernet0): ! [OK]
Erase flash device before writing? [confirm]
Flash contains files. Are you sure you want to erase? [confirm]
Copy 'file1' from server
  as 'file1' into Flash WITH erase? [yes/no] yes
Erasing device... eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee ...erased
Loading file1 from 131.108.101.101 (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 resulting from 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 memory bank support in boot ROMs. If the partition entered is not valid, the process terminates. You have the option to enter a partition number, a question mark (?) for a directory display of all partitions, or a question mark and a number (?number) for a directory display of a particular partition. The default is the first read/write partition.

Router# copy rcp flash
System flash partition information:
Partition   Size     Used    Free    Bank-Size   State       Copy-Mode
    1       4096K    2048K   2048K   2048K       Read Only   RXBOOT-FLH
    2       4096K    2048K   2048K   2048K       Read/Write  Direct
[Type ?<no> for partition directory; ? for full directory; q to abort]
Which partition? [default = 2]

                               ****  NOTICE  ****
Flash load helper v1.0
This process will accept the copy options and then terminate
the 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/status
  1   3459720  master/igs-bfpx.100-4.3
[3459784 bytes used, 734520 available, 4194304 total]
Address or name of remote host [255.255.255.255]? 131.108.1.1
Source file name? master/igs-bfpx-100.4.3
Destination file name [default = source name]?

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 server
as 'master/igs-bfpx.100-4.3' into Flash WITH erase? [yes/no] yes

System flash directory, partition 2:
File  Length   Name/status
  1   3459720  master/igs-bfpx.100-4.3
[3459784 bytes used, 734520 available, 4194304 total]
Address or name of remote host [255.255.255.255]? 131.108.1.1
Source file name? master/igs-bfpx.100-4.3
Destination file name [default = source name]?

Accessing file 'master/igs-bfpx.100-4.3' on ABC.CISCO.COM...
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 server
as 'master/igs-bfpx.100-4.3' into Flash WITH erase? [yes/no] yes

Related Commands

boot config
boot system flash
cd
copy flash rcp
ip rcmd remote-username
verify flash

copy tftp flash

To copy a file from a TFTP server to the router or to another destination, use the copy tftp flash EXEC command.

Syntax Description

Command Mode

EXEC

Usage Guidelines

The system prompts for the address of the TFTP server and TFTP filename if you do not provide them at the command line. When copying to internal Flash memory, the system provides an option to erase existing internal Flash memory before writing onto it. The entire copying process takes several minutes and differs 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 distributed with the system software image. The checksum of the image in Flash memory is displayed at the bottom of the screen when you enter the copy tftp flash command. The README file was copied to the TFTP server automatically when you installed the system software image.

 
Caution If the checksum value is not correct according to the value in the README file, do not reboot the router. Enter 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 router from Flash memory. If you have a corrupted image in Flash memory and try to boot from Flash memory, the router starts the system image contained in ROM (assuming booting from a network server is not configured). If ROM does not contain a fully functional system image, the router cannot function and must be reconfigured through a direct console port connection.

The following example shows sample output of copying a system image named file1 into Flash memory:

Router# copy tftp flash
System flash directory, partition 2:
File  Length   Name/status
  1   984      file1 [deleted]
  2   984      file1
[2096 bytes used, 8386512 available, 8388608 total]
Address or name of remote host [255.255.255.255]? 223.255.254.254
Source file name? file1
Destination file name [file1]?
Accessing file 'file1' on 223.255.254.254...
Loading dirt/ssangiah/file1 .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 'file1' from server
  as 'file1' into Flash WITH erase? [yes/no] yes
Erasing device... eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee ...erased
Loading file1 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 exclamation point (!) indicates that the copy process is taking place. Each exclamation point indicates that ten packets have been transferred successfully. A series of "V" characters indicates that a checksum verification of the image is occurring after the image is written to Flash memory.

The following example shows sample output resulting from 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 memory bank support in boot ROMs. 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 read/write partition.

Router# copy tftp flash
System flash partition information:
Partition   Size     Used    Free    Bank-Size   State       Copy-Mode
    1       4096K    2048K   2048K   2048K       Read Only   RXBOOT-FLH
    2       4096K    2048K   2048K   2048K       Read/Write  Direct
[Type ?<no> for partition directory; ? for full directory; q to abort]
Which partition? [default = 2]

                               ****  NOTICE  ****
Flash load helper v1.0
This process will accept the copy options and then terminate
the 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/status
  1   3459720  master/igs-bfpx.100-4.3
[3459784 bytes used, 734520 available, 4194304 total]
Address or name of remote host [255.255.255.255]? 131.108.1.1
Source file name? master/igs-bfpx-100.4.3
Destination file name [default = source name]?

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 server
as 'master/igs-bfpx.100-4.3' into Flash WITH erase? [yes/no] yes

System flash directory, partition 2:
File  Length   Name/status
  1   3459720  master/igs-bfpx.100-4.3
[3459784 bytes used, 734520 available, 4194304 total]
Address or name of remote host [255.255.255.255]? 131.108.1.1
Source file name? master/igs-bfpx.100-4.3
Destination file name [default = source name]?

Accessing file 'master/igs-bfpx.100-4.3' on ABC.CISCO.COM...
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 server
as 'master/igs-bfpx.100-4.3' into Flash WITH erase? [yes/no] yes

Related Commands

copy flash tftp
verify
verify flash

Additional Release Note Information

For detailed information about this software release, see the Cisco IOS release notes shipped with your router and also located on the Documentation CD-ROM. Information about the feature pack described in this release note includes the following:

• New features

• Important notes

• Caveats

About Cisco IOS Software Electronic Documentation

Cisco IOS software documentation is provided on the Documentation CD that is included with your feature pack. Documentation about Cisco IOS Release 11.2(3) and 11.2(3)P describes the software images included on this feature pack CD.

To locate this documentation, you can either use the Documentation CD or go to www.cisco.com, select Products and Ordering, Documentation, Cisco IOS Software Configuration, and Cisco IOS Release 11.2. The documentation for Cisco IOS Release 11.2 is organized as follows:

• Release Notes--use the Cisco IOS Release 11.2(3) Release Notes and Cisco IOS Release 11.2(3)P Release Notes.

• Feature Guides--use the Cisco IOS Release 11.2(3)P Feature Guide.

• Eight modules that comprise the configuration guides and command references, which are described in Figure 1.

• Cisco IOS Software Command Summary--summarizes the commands in the command reference publications. For each command, the summary provides complete syntax, the purpose of the command, and a description of each keyword and argument in the command syntax.

• System Error Messages--describes system error messages reported by Cisco IOS software.

• Cisco Management Information Base (MIB) User Quick Reference--describes the Cisco Systems private, or local, Management Information Base (MIB), which is provided with all Cisco software releases and with CiscoWorks router management software. A MIB file contains variables that can be set or read to provide information on network devices and interfaces. The Cisco MIB is a set of variables that are private extensions to the Internet standard MIB II.

• Debug Command Reference--provides information about using debug commands to troubleshoot your network. The Debug Command Reference is intended for network administrators who already know how to configure a router and are familiar with all relevant network equipment.

• Caveats

Cisco Connection Online

Cisco Connection Online (CCO) is Cisco Systems' primary, real-time support channel. Maintenance customers and partners can self-register on CCO to obtain additional information and services.

Available 24 hours a day, 7 days a week, CCO provides a wealth of standard and value-added services to Cisco's customers and business partners. CCO services include product information, product documentation, software updates, release notes, technical tips, the Bug Navigator, configuration notes, brochures, descriptions of service offerings, and download access to public and authorized files.

CCO serves a wide variety of users through two interfaces that are updated and enhanced simultaneously: a character-based version and a multimedia version that resides on the World Wide Web (WWW). The character-based CCO supports Zmodem, Kermit, Xmodem, FTP, and Internet e-mail, and it is excellent for quick access to information over lower bandwidths. The WWW version of CCO provides richly formatted documents with photographs, figures, graphics, and video, as well as hyperlinks to related information.

You can access CCO in the following ways:

• WWW:  http://www.cisco.com

• WWW:  http://www-europe.cisco.com

• WWW:  http://www-china.cisco.com

• Telnet:  cco.cisco.com

• Modem:  From North America, 408 526-8070; from Europe, 33 1 64 46 40 82. Use the following terminal settings: VT100 emulation; databits: 8; parity: none; stop bits: 1; and connection rates up to 28.8 kbps.

For a copy of CCO's Frequently Asked Questions (FAQ), contact cco-help@cisco.com. For additional information, contact cco-team@cisco.com.

If you are a network administrator and need personal technical assistance with a Cisco product that is under warranty or covered by a maintenance contract, contact Cisco's Technical Assistance Center (TAC) at 800 553-2447, 408 526-7209, or tac@cisco.com. To obtain general information about Cisco Systems, Cisco products, or upgrades, contact 800 553-6387, 408 526-7208, or cs-rep@cisco.com.