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Cisco IOS Software Releases 12.2 Special and Early Deployments

Cisco SOHO 70 and Cisco 800 Series - Cisco IOS Release 12.2(4)XM

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Release Notes for the SOHO 70 Series Routers and the Cisco 800 Series Routers for Cisco IOS Release 12.2(4)XM

Table Of Contents

Release Notes for the SOHO 70 Series Routers and the Cisco 800 Series Routers for Cisco IOS Release 12.2(4)XM

Contents

System Requirements

Memory Requirements

Hardware Supported

SOHO 77 Routers

SOHO 78 Routers

Cisco 806 Routers

Cisco 826, Cisco 827, and Cisco 827-4V Routers

Cisco 828 Routers

Determining the Software Version

Upgrading to a New Software Release

Feature Set Tables

New and Changed Information

New Features in Release 12.2(4)XM

Committed Access Rate

Class-Based Traffic Shaping to Support Low Latency Queueing

Dial-On-Demand Routing for PPPoE Client

Low Latency Queueing

Weighted Fair Queuing

New Software Features in Release 12.2 T

Important Notes

Configuring the DDR for PPPoE Client Feature

Configuring PPPoE on a Cisco 806 Router

dsl enable-training-log Command

Globespan R1.5 Firmware

Caveats

Resolved Caveats - Release 12.2(4)XM4

CSCdx36052

CSCdx17233

CSCdv43559

CSCdv54349

CSCdv27836

CSCdx11089

CSCdx19222

CSCdx22635

CSCdw35930

Resolved Caveats - Release 12.2(4)XM3

CSCdw54337

CSCdw61794

Open Caveats - Release 12.2(4)XM3

Miscellaneous

Resolved Caveats - Release 12.2(4)XM2

Management

Resolved Caveats - Release 12.2(4)XM1

Management

Open Caveats - Release 12.2(4)XM

CSCdw21031

CSCdw22299

CSCdw30110

Related Documentation

Release-Specific Documents

Platform-Specific Documents

Cisco 800 Series and SOHO 77 Routers

Software Configuration

Feature Modules

Feature Navigator

Cisco IOS Software Documentation Set

Documentation Modules

Release 12.2 Documentation Set

Obtaining Documentation

World Wide Web

Documentation CD-ROM

Ordering Documentation

Documentation Feedback

Obtaining Technical Assistance

Cisco.com

Technical Assistance Center

Contacting TAC by Using the Cisco TAC Website

Contacting TAC by Telephone


Release Notes for the SOHO 70 Series Routers and the Cisco 800 Series Routers for Cisco IOS Release 12.2(4)XM


June 25, 2002

These release notes for the SOHO 70 Series Routers and Cisco 800 Series Routers describe the enhancements provided in Cisco IOS Release 12.2(4)XM4. These release notes are updated as needed. Use these release notes with Cross-Platform Release Notes for Cisco IOS Release 12.2 T located on Cisco.com and the Documentation CD.

For a list of the software caveats that apply to Cisco IOS Release 12.2(4)XM4, see the Caveats for 
Cisco IOS Release 12.2 T. The caveats document is updated for every maintenance release and is located on Cisco.com and the Documentation CD.

Contents

These release notes discuss the following topics:

System Requirements

New and Changed Information

Important Notes

Caveats

Related Documentation

Obtaining Documentation

Obtaining Technical Assistance

System Requirements

This section describes the system requirements for Release 12.2(4)XM4 and includes the following sections:

Memory Requirements

Hardware Supported

Determining the Software Version

Feature Set Tables

Feature Set Tables

Memory Requirements

Table 1 and Table 2 provide the memory requirements for the Cisco IOS feature sets supported by Cisco IOS Release 12.2(4)XM4 on the SOHO 70 Series Routers and Cisco 800 Series Routers.

Table 1 Recommended Memory for the SOHO 70 Series Routers 

Platforms
Image Name
Feature Set
Image
Recommended Flash Memory
Recommended DRAM Memory
Runs From

SOHO 77 Router

Cisco soho70 Series IOS IP

IP

soho70-y1-mz

8 MB

16 MB

RAM

SOHO 78 Router

Cisco soho78 Series IOS IP

IP

soho78-y1-mz

8 MB

16 MB

RAM


\

Table 2 Recommended Memory for the Cisco 800 Series Routers 

Platforms
Image Name
Feature Set
Image
Recommended Flash Memory
Recommended DRAM Memory
Runs From

Cisco 806 Router

Cisco 806 Series IOS IP/FW Plus 3DES

IP/FW Plus 3DES

c806-k9osy6-mz

8 MB

20 MB

RAM

Cisco 806 Series IOS IP/FW

IP/FW

c806-oy6-mz

8 MB

16 MB

RAM

Cisco 806 Series IOS IP Plus

IP Plus

c806-sy6-mz

8 MB

16 MB

RAM

Cisco 806 Series IOS IP

IP

c806-y6-mz

8 MB

16 MB

RAM

Cisco 826 and 827 Routers

Cisco 820 Ser IOS IP Plus IPSec 56

IP Plus IPSec 56

c820-k9osy6-mz

8 MB

24 MB

RAM

 

Cisco 820 Ser IOS IP/FW

IP/FW

c820-oy6-mz

8 MB

20 MB

RAM

 

Cisco 820 Ser IOS IP Plus

IP Plus

c820-sy6-mz

8 MB

20 MB

RAM

 

Cisco 820 Ser IOS IP

IP

c820-y6-mz

8 MB

16 MB

RAM

Cisco 827-4V Routers

Cisco 820 Ser IOS IP/FW/Voice Plus 3DES

IP/FW/Voice Plus 3DES

c820-k9osv6y6-mz

8 MB

32 MB

RAM

 

Cisco 820 Ser IOS IP/Voice Plus

IP/Voice Plus

c820-sv6y6-mz

8 MB

24 MB

RAM

Cisco 827-4V Routers (continued)

Cisco 820 Ser IOS IP/FW/ Voice

IP/FW/Voice

c820-ov6y6-mz

8 MB

24 MB

RAM

Cisco 820 Ser IOS IP/Voice

IP/Voice

c820-v6y6-mz

8 MB

24 MB

RAM

Cisco 828 Router

IP/FW Plus 3DES

IP/FW Plus 3DES

c828-k9osy6-mz

8 MB

24 MB

RAM

IP/FW

IP/FW

c828-oy6-mz

8 MB

20 MB

RAM

IP Plus

IP Plus

c828-sy6-mz

8 MB

20 MB

RAM

IP

IP

c828-y6-mz

8 MB

16 MB

RAM


Hardware Supported

Cisco IOS Release 12.2(4)XM4 supports the following Cisco routers:

SOHO 70 series routers:

SOHO 77 Routers

SOHO 78 Routers

Cisco 806 Routers

Cisco 820 series routers: 

Cisco 826 Routers

Cisco 827 Routers

Cisco 827-V Routers

Cisco 828 Routers

For detailed descriptions of new hardware features and which features are supported on each router, see the "New and Changed Information" section.

SOHO 77 Routers

The SOHO 77 router provides the following key hardware features:

Connection to an ADSL network through an asymmetric digital subscriber line (ADSL) port.

A central processing unit: 50 MHz MPC 855T RISC processor.

Ability to be stacked or mounted on a wall.

Locking power connectors and a Kensington-compatible locking slot.

Table 3 summarizes Cisco SOHO 77 router ports.

Table 3 Supported Interfaces for the SOHO 77 Routers

Router
Ethernet Ports
ADSL Ports
Console Ports

SOHO 77

One 10BaseT (RJ-45)

RJ-11

RJ-45


SOHO 78 Routers

The SOHO 78 router provides the following key hardware features:

Connection to a G.SHDSL network through a G.SHDSL port.

A central processing unit: 50 MHz MPC 855T RISC processor.

Ability to be stacked or mounted on a wall.

Locking power connectors and a Kensington-compatible locking slot.

Table 4 summarizes Cisco SOHO 78 router ports.

Table 4 Supported Interfaces for the SOHO 78 Routers

Router
Ethernet Ports
G.SHDSL Ports
Console Ports

SOHO 78

One 10BaseT (RJ-45)

RJ-11

RJ-45


Cisco 806 Routers

Cisco 806 routers provide the following key hardware features:

Provide connection to 10BaseT (10-Mbps) Ethernet networks and is compatible with 10/100-Mbps devices.

Flash memory: The Cisco IOS uses the current default of 8 MB for loading Cisco IOS images.

Webflash: 2 MB of Flash memory reserved for use by the Cisco Router Web Setup software.

Cisco 806 Router Dynamic RAM: Default is 12 MB of DRAM and is expandable to 32 MB, using 4-MB, 8-MB, and 16-MB DIMM cards.

The central processing unit is a 50 MHz MPC 855T RISC processor.

Support Cisco IOS software.

Color-coded ports and cable reduce the chance of cabling errors.

Ability to be stacked or mounted on a wall.

Accept a cable lock for physically securing the router.

The routers provide locking power connectors and a Kensington-compatible locking slot.

Table 5 summarizes Cisco 806 router ports.

Table 5 Cisco 806 Router Ports

Port Type
Description

Ethernet Port

One 10BaseT (RJ-45). Connects to broadband modem or Ethernet switch.

Ethernet Hubbed Ports

Four 10BaseT (RJ-45). Connect to Ethernet network devices.

Console Port

One (RJ-45).


Cisco 826, Cisco 827, and Cisco 827-4V Routers

The Cisco 826, Cisco 827, and Cisco 827-4V Series Routers provide the following key hardware features:

The routers provide connection to an ADSL network or telephones and fax machines through an ADSL port.

Flash memory: Default is 12 MB and is expandable to 20 MB. If 12 MB is Flash is installed, 8 MB is used for the Cisco IOS images and 4 MB hosts the ROMMON and NVRAM. Additional memory can be added using Flash cards.

Cisco 826 and Cisco 827 routers Dynamic RAM: Default is 16 MB of DRAM and is expandable to 32 MB.

Cisco 827-4V router Dynamic RAM: Default is 24 MB and is expandable to 32 MB. The Cisco 827-4V router also contains an 8-MB DIMM card.

The central processing unit is a 50 MHz MPC 855T RISC processor.

Color-coded ports and cable reduce the chance of cabling errors.

Ability to be stacked or mounted on a wall.

The routers provide locking power connectors and a Kensington-compatible locking slot.

Table 6 Supported Interfaces for the Cisco 826, Cisco 827, and Cisco 827-4V Router 

Router
Ethernet Ports
ADSL Ports
Telephone Ports
Console Ports

Cisco 826

One 10BaseT (RJ-45)

RJ-45

-

RJ-45

Cisco 827

One 10BaseT (RJ-45)

RJ-45

-

RJ-45

Cisco 827-4V

One 10BaseT (RJ-45)

RJ-45

Four (RJ-11)

RJ-45


Table 6 lists the supported interfaces for the Cisco 826, Cisco 827, and Cisco 827-4V routers.

Cisco 828 Routers

Cisco 828 routers provide the following key hardware features:

Provide connection to 10BaseT (10-Mbps) Ethernet networks and is compatible with 10/100-Mbps devices.

Provide connection to G.991.2 (digital-encoding standard) symmetrical high-speed digital subscriber line (G.SHDSL) networks.

Flash memory: The Cisco IOS uses the current default of 8 MB for loading Cisco IOS images, upgradable to 16 MB.

Webflash: 2 MB of Flash memory reserved for use by the Cisco Router Web Setup software.

Dynamic RAM: Default is 16 MB of DRAM and is expandable to 32 MB, using 4-MB, 8-MB, and 16-MB DIMM cards.

The central processing unit is a 50 MHz MPC 855T RISC processor.

Support Cisco IOS software.

Color-coded ports and cables, which reduce the chance of cabling errors.

Ability to be stacked or mounted on a wall.

Accept a cable lock for physically securing the routers.

Provide locking power connectors.

Table 7 summarizes Cisco 828 router ports.

Table 7 Cisco 828 Router Ports

Port Type
Description

Ethernet Hubbed Ports

Four 10BaseT (RJ-45). Connect to Ethernet network devices.

G. SHDSL Port

One (RJ-11). Provides connection to G. SHDSL networks.

Console Port

One (RJ-45).


Determining the Software Version

To determine the version of Cisco IOS software running on your Cisco router, log in to the router and enter the show version EXEC command. The following sample displays command output from a Cisco 806 router running Release 12.2(4)XM4:

Router> show version
Cisco Internetwork Operating System Software 
IOS (tm) 12.2 Software (c806-y6-mz), Version 12.2(4)XM4, RELEASE SOFTWARE

Upgrading to a New Software Release

For general information about upgrading to a new software release, see
Technical Support for 800 Series Routers.

Feature Set Tables

The Cisco IOS software is packaged in feature sets consisting of software images—depending on the platform. Each feature set contains a specific set of Cisco IOS features. Release 12.2(4)XM4 supports the same feature sets as Releases 12.2 T, but Release 12.2(4)XM4 can include new features supported by the SOHO 70 Series Routers and Cisco 800 Series Routers.

Table 8 through Table 11 list the features and feature sets supported in Cisco IOS Release 12.2(4)XM4:

Table 8—SOHO 77 and SOHO 78 routers

Table 9—Cisco 806 routers

Table 10—Cisco 826 and 827 routers

Table 11—Cisco 828 routers

The tables use the following conventions:

Yes—The feature is supported in the software image.

No—The feature is not supported in the software image.

In—The number in the "In" column indicates the Cisco IOS release in which the feature was introduced. For example, "Release 12.2(4)XM4" means the feature was introduced in Release 12.2(4)XM4. If a cell in this column is empty, the feature was included in a previous release or the initial base release.


Note These feature set tables only contain a selected list of features. These tables are not cumulative—nor do they list all the features in each image.


Table 8 Feature List by Feature Set for the SOHO 77 and SOHO 78 Routers 

 
Feature Set
Features
In
IP
Business-Class Quality of Service
   

Class-Based Traffic Shaping to Support Low Latency Queueing

 

No

Weighted Fair Queuing

 

No

Quality of Service
   

Committed Access Rate (CAR)

 

No

Low Latency Queueing

 

No

Dial Services
   

Dial-On-Demand Routing for PPPoE Client

12.2(4)XM

Yes


Table 9 Feature List by Feature Set for the Cisco 806 Routers 

 
Feature Sets
Features
In
IP/FW Plus 3DES
IP/FW
IP Plus
IP
Business-Class Quality of Service
         

Class-Based Traffic Shaping to Support Low Latency Queueing

12.2(4)XM

Yes

No

Yes

No

Weighted Fair Queuing

12.2(4)XM

Yes

Yes

Yes

Yes

Quality of Service
         

Committed Access Rate (CAR)

12.2(4)XM

Yes

No

Yes

No

Low Latency Queueing

12.2(4)XM

No

No

Yes

No

Dial Services
         

Dial-On-Demand Routing for PPPoE Client

12.2(4)XM

Yes

Yes

Yes

Yes


Table 10 Feature List by Feature Set for the Cisco 826 and 827 Routers (Part 1 of 2) 

 
Feature Sets
Features
In
IP Plus IPSec 56
IP/FW
IP Plus
IP
Business-Class Quality of Service
         

Class-Based Traffic Shaping to Support Low Latency Queueing

 

No

No

No

No

Weighted Fair Queuing

 

Yes

Yes

Yes

Yes

Quality of Service
         

Committed Access Rate (CAR)

12.2(2)XK

Yes

No

Yes

No

Low Latency Queueing

 

Yes

No

Yes

No

Dial Services
         

Dial-On-Demand Routing for PPPoE Client

12.2(4)XM

Yes

Yes

Yes

Yes


Table 10 Feature List by Feature Set for the Cisco 826 and 827 Routers (Part 2 of 2) 

 
Feature Sets
Features
In
IP/FW/Voice Plus 3DES
IP/Voice Plus
IP/FW/ Voice
IP/Voice
Business-Class Quality of Service
         

Class-Based Traffic Shaping to Support Low Latency Queueing

 

No

No

No

No

Weighted Fair Queuing

 

Yes

Yes

Yes

Yes

Quality of Service
         

Committed Access Rate (CAR)

 

No

No

No

No

Low Latency Queueing

 

Yes

Yes

No

No

Dial Services
         

Dial-On-Demand Routing for PPPoE Client

12.2(4)XM

Yes

Yes

Yes

Yes


Table 11 Feature List by Feature Set for the Cisco 828 Series Routers 

 
Feature Sets
Features
In
IP/FW Plus 3DES
IP/FW
IP Plus
IP
Business-Class Quality of Service
         

Class-Based Traffic Shaping to Support Low Latency Queueing

 

No

No

No

No

Weighted Fair Queuing

 

Yes

Yes

Yes

Yes

Quality of Service
         

Committed Access Rate (CAR)

12.2(2)XK

Yes

No

Yes

No

Low Latency Queueing

 

Yes

No

Yes

No

Dial Services
         

Dial-On-Demand Routing for PPPoE Client

12.2(4)XM

Yes

Yes

Yes

Yes


New and Changed Information

The following sections list the new software features supported by routers for Release 12.2(4)XM4 and above:

New Features in Release 12.2(4)XM

The following sections list the new software features supported by Cisco IOS Release 12.2(4)XM4 on the SOHO 70 Series Routers and the Cisco 800 Series Routers.

Committed Access Rate

Release 12.2(4)XM4 adds support for committed access rate (CAR) to limit bandwidth transmission rates to traffic sources and destinations. The CAR feature also specifies policies for handling traffic that breaches the specified bandwidth allocations. To enable CAR, enter the command rate-limit in ATM-interface-configuration mode. Additional feature configuration instructions and examples are available in the Software Enhancements for the Cisco 800 Routers and SOHO Routers  publication.

Class-Based Traffic Shaping to Support Low Latency Queueing

Class-Based Traffic Shaping (CBTS) is a feature for controlling traffic that is exiting the Ethernet 1 (WAN) interface, to match the interface-transmission speed to the speed of the attached broadband modem or to the remote target interface. CBTS ensures that traffic conforms to proper policies, to eliminate bottlenecks in topologies with data-rate mismatches.

Dial-On-Demand Routing for PPPoE Client

The dial-on-demand routing (DDR) for PPPoE client feature provides flexibility for those subscribers whose ISP charges based on the amount of time they are connected to the network (non-flat rate services). With this feature, you can designate a type of traffic as interesting traffic, and configure the router to bring up the PPPoE connection when interesting traffic arrives from the LAN interface and to bring down the connection when the dialer idle timer expires.

Low Latency Queueing

Low Latency Queueing (LLQ) provides a low-latency, strict-priority transmit queue for voice over IP (VoIP) traffic. Strict priority queueing allows delay-sensitive data such as voice to be dequeued and sent first (before packets in other queues are dequeued), giving delay-sensitive data preferential treatment over other traffic. Refer to Software Enhancements for the Cisco 800 Routers and SOHO Routers  for more information on this feature.

Weighted Fair Queuing

Weighted Fair Queuing (WFQ) enables slow-speed links, such as serial links, to provide fair treatment for all types of traffic. The WFQ feature classifies traffic into different flows (also called conversations), based on layer-three and layer-four information, such as IP addresses and TCP ports. The WFQ feature does not require you to define access lists; this means low-bandwith traffic has priority over high-bandwith traffic because high-bandwidth traffic shares the transmission media in proportion to its assigned weight.

The WFQ feature has certain limitations: it is not scalable if the flow amount increases considerably and native WFQ is not available on high-speed interfaces, such as ATM interfaces. The feature Class-Based WFQ, available on Plus images, overcomes these limitations.

New Software Features in Release 12.2 T

For information regarding the features supported in Cisco IOS Release 12.2 T, refer to the Cross-Platform Release Notes and New Feature Documentation links at the following location on Cisco.com and the Documentation CD-ROM:

http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/index.htm 

This URL is subject to change without notice. If it changes, point your web browser to Cisco.com, and click on the following path:

Service & Support: Technical Documents: Release 12.2 (from the Cisco IOS Software drop-down list)

Important Notes

The following sections contain important notes about Cisco IOS Release 12.2(4)XM4 that can apply to SOHO 70 and Cisco 800 series routers. (Also, see the "Caveats" section.)

Configuring the DDR for PPPoE Client Feature

To configure the DDR for PPPoE client feature, use the following command:

pppoe-client dial-pool-number number [dial-on-demand]

The feature is disabled by default. The following commands must also be configured for the dialer interface to support the DDR for PPPoE client feature:

dialer-group dialer-group
dialer idle-timeout dialer idle-timeout
dialer hold-queue dialer hold-queue

Additionally, the following command must be configured in global command mode:

dialer-list dialer-list protocol ip [deny | list | permit]

Here is a PPPoE client configuration example:

!
vpdn enable
no vpdn logging
!
vpdn-group 1
 request-dialin
  protocol pppoe
!
interface Ethernet1
 pppoe enable
 pppoe-client dial-pool-number 1
!
interface Dialer1
 ip address negotiated
 ip mtu 1492
 encapsulation ppp
 dialer pool 1
 dialer idle-timeout 180 either
 dialer hold-queue 100
 dialer-group 1
!
dialer-list 1 protocol ip permit
!         
ip route 0.0.0.0 0.0.0.0 Dialer1

Configuring PPPoE on a Cisco 806 Router

When specifying the method of authentication while configuring PPPoE and connecting to a Service Provider, the argument optional might be required to successfully authenticate the connection. For example:

interface Dialer0
 ppp authentication pap optional

or

interface Dialer0
 ppp authentication chap optional

dsl enable-training-log Command

In previous releases, a DSL training log was retrieved by default each time a Cisco router established contact with a DSLAM. The training log is a record of the events that occur when the router trains or negotiates communication parameters with the DSLAM at the central office.

Retrieving this log adds time to the training process and is not always necessary after a router has successfully trained. Therefore, the Cisco IOS 12.2(4)XM images now disable the retrieval of the training log by default.

To retrieve the log, enter the command dsl enable-training-log. The no form of this command disables the retrieval of the DSL training log. The caveat number associated with this modification is CSCdw18903. For instructions on how to use the command dsl enable-training-log, refer to the online document Software Enhancements for the Cisco 800 Routers  and SOHO Routers. 

Globespan R1.5 Firmware

When using Release 12.2(4)XM4, you must use firmware version R1.5 for G.SHDSL chip sets. Firmware version R1.5 is an upgrade from R1.0, with better performance and a more reliable rate adaptation training capability. The R1.5 firmware release is compliant with the ITU-T G.991.2 standard and backward-compatible with releases R1.0 and R1.35, which were released by Cisco DSLAMs with 8xG.SHDSL cards.

Caveats

Caveats describe unexpected behavior in Cisco IOS software releases. Severity 1 caveats are the most serious caveats, severity 2 caveats are less serious, and severity 3 caveats are the least serious of these three severity levels.

Caveats in Cisco IOS Releases 12.2 and 12.2 T are also in Cisco IOS Release 12.2(4)XM4. For information on caveats in Cisco IOS Release 12.2, see Caveats for Cisco IOS Release 12.2. For information on caveats in Cisco IOS Release 12.2 T, see Caveats for Cisco IOS Release 12.2 T. These two documents list severity 1 and 2 caveats and are located on CCO and the Documentation CD-ROM.


Note If you have an account with Cisco.com, you can also use the Bug Toolkit to find select caveats of any severity. To reach the Bug Toolkit, log in toCisco.com and click Service & Support: Technical Assistance Center: Tool Index: Bug Toolkit. Another option is to go to http://www.cisco.com/cgi-bin/Support/Bugtool/launch_bugtool.pl. 


Resolved Caveats - Release 12.2(4)XM4

This section describes unexpected behavior that is fixed in Release 12.2(4)XM4.

CSCdx36052

The following Alcatel DSLAM has been tested with the c828/SOHO78 and is supported:

Alcatel 7300 with the G.SHDSL linecard. DSLAM:
Firmware: GWNAAA4.118
Software:4.1.31

The supported EOC messages are:

11 - Status Request
12 - Full Status Request
140 - Performance Status SHDSL Network Side
144 - Generic Unable To Comply (UTC)
129 - Discovery Response
130 - Inventory Response
131 - Configuration Response - SHDSL

CSCdx17233

A Cisco router running Simple Network Management Protocol (SNMP) might reload after a severe memory leak occurs.

CSCdv43559

If you use NAS for ASCII logins using a TACACS+ server that uses a TACACS+ status of GETDATA (3) to collect information, the login fails. The work around for this problem is to fail over to a backup authentication method.

CSCdv54349

Local AAA authentication might not function. To work around the problem, assign AAA to a remote server or install an earlier Cisco IOS software release.

CSCdv27836

If you enter Return without any other characters when you are prompted for a username, a Cisco router enters an infinite loop, repeatedly prompting for a username. If a hostile user repeatedly enters Return without any other characters, eventually the router unexpectedly resets. This problem occurs for Exec logins and includes Telnets.

There is no workaround for direct console access. In this case an attacker also has a physical access to the router, so other attacks are possible. If you are using Telnet to connect to the device, a workaround is to use SSH instead of Telnet, to allow Telnet access only from authorized hosts. If you are using a remote console via terminal server to access the Cisco router, a workaround is to use SSH to access the terminal server and then Telnet to the Cisco router port, to allow Telnet access from authorized hosts only.

CSCdx11089

When using Telnet and a CS UNIX TACACS+ server to access a router with TACACS+ user authentication, you cannot activate the "Change password sequence."

CSCdx19222

The RTR Timeout resets on reload.

CSCdx22635

A Cisco router can run out of memory if the command snmp get-many is entered. The bug is in the MMI code. The MMI subsystem is now removed to avoid this memory-leak problem.

CSCdw35930

The command aaa authentication attempts login n appears in a configuration if the command tacacs-server attempts n is also present in the configuration. Changes to either command are reflected in the other. The number of attempts granted is actually one less than the number configured. The workaround is to configure an additional attempt.

Resolved Caveats - Release 12.2(4)XM3

This section describes unexpected behavior that is fixed in Release 12.2(4)XM3.

CSCdw54337

A Cisco 806 router might reload with a SegV Exception at PC 0x8026D074.

CSCdw61794

A PPPoE call made through a Cisco 806 router might fail. If the command debug ppp negotiation is enabled during the time of the failure, the following error message is displayed:

Vi1 UNKNOWN(0xBADD): LCP not open, discarding packet

A workaround is to enter the command no ip cef in the global configuration mode to disable cef.

Open Caveats - Release 12.2(4)XM3

This section describes possibly unexpected behavior by Release 12.2(2)XK3.

Miscellaneous

CSCin00238

The last encryption map entry cannot be removed from the dialer interface even after the command no crypto map testtag is given in the global configuration mode. A workaround is to manually shut down the dialer interface and then remove the encryption map entry.

CSCdu00267

When running a firewall audit for TFTP, the TFTP data session responder log displays the number of bytes transferred incorrectly. Only logging functionality is affected, however, and the TFTP firewall audit feature operates correctly.

CSCdv73353

Fast switching is enabled by the configuration of the command ip cef. Packets cannot be Fast switched on Cisco SOHO 77 routers because Cisco SOHO 77 routers do not support the command ip cef.

CSCdv81134

If a Cisco 827 router is configured to inspect TFTP application traffic with audit trails turned on, the audit trail for TFTP displays an incorrect number of bytes transmitted for the tftp-data session.

CSCdv85349

The use of PPTP functionality on a Cisco 806 router causes the router to unexpectedly reload. Although PPTP termination commands can be entered on a Cisco 806 router, Cisco 806 routers only supports PPTP passthrough and do not support the PPTP termination feature.

CSCdw30110

The encryption process on a Cisco 806 router remains in pending status even after an Entrust CA server grants a digital certificate.

Resolved Caveats - Release 12.2(4)XM2

This section describes unexpected behavior that is fixed in Release 12.2(4)XM2.

Management

CSCdw65903

An error can occur with management protocol processing. Please use the following URL for further information:

http://www.cisco.com/cgi-bin/bugtool/onebug.pl?bugid=CSCdw65903 

Resolved Caveats - Release 12.2(4)XM1

This section describes unexpected behavior that is fixed in Release 12.2(4)XM1.

Management

CSCdv65027

The command-line interface (CLI) does not prompt for the erase keyword when the copy [ /erase] source-url destination-url EXEC command is entered. This behavior does not allow a file system to be erased using the copy [ /erase] source-url destination-url EXEC command. To work around this problem, enter the erase filesystem: command before entering the copy EXEC command.

CSCdu86498

When AAA Authentication is enabled and default group RADIUS is configured, you are prompted for a user-name and password. Previous Cisco IOS releases only prompted you for "enable password." To work around this problem, enter any character(s) at the user-name prompt and then enter the enable password.

Open Caveats - Release 12.2(4)XM

This section describes possibly unexpected behavior by Release 12.2(4)XM. Only severity 1 through 3 caveats are included.

CSCdw21031

Due to CRC errors, when a VC bundle is enabled some packets are dropped on the output queue of a Cisco 826 router ATM interface.

CSCdw22299

Incoming packets are process switched when a generic routing encapsulation (GRE) tunnel is used over a PPPoA or PPPoE connection.

CSCdw30110

A Cisco 806 router encryption process remains in pending status after an Entrust CA server is granted a digital certificate.

Related Documentation

The following sections describe the documentation available for the SOHO 70 and Cisco 800 series routers. Typically, these documents consist of hardware and software installation guides, Cisco IOS configuration and command references, system error messages, feature modules, and other documents.

Documentation is available as printed manuals or electronic documents, except for feature modules and the Cisco IOS release notes, which are available online on Cisco.com and the Documentation CD-ROM.

Use these release notes with the documents listed in the following sections:

Release-Specific Documents

Platform-Specific Documents

Feature Modules

Cisco IOS Software Documentation Set

Release-Specific Documents

The following documents are specific to Release 12.2 and apply to Release 12.2(4)XM4. They are located on Cisco.com and the Documentation CD-ROM (under the heading Service & Support):

To reach the Release Notes for the Cisco 800 Series Routers for Cisco IOS  Release 12.2, click this path:

Technical Documents: Cisco IOS Software: Release 12.2: Release Notes: Cisco IOS Release 12.2T 

To reach the Cross-Platform Release Notes for Cisco IOS Release 12.2 T, click this path:

Technical Documents: Cisco IOS Software: Release 12.2: Release Notes: Cisco IOS  Release 12.2 T 

To reach product bulletins, field notices, and other release-specific documents, click this path:

Technical Documents: Product Bulletins 

The Caveats for Cisco IOS Release 12.2 and Caveats for Cisco IOS Release 12.2 T  documents contain caveats applicable to all platforms for all maintenance releases of Release 12.2. To reach the caveats documents, click this path:

Technical Documents: Cisco IOS Software: Release 12.2: Caveats 


Note If you have an account with Cisco.com, you can also use the Bug Toolkit to find select caveats of any severity. To reach the Bug Toolkit, log in toCisco.com and click Service & Support: Technical Assistance Center: Tool Index: Bug Toolkit. Another option is to go to http://www.cisco.com/cgi-bin/Support/Bugtool/launch_bugtool.pl. 


Platform-Specific Documents

Hardware installation guides, configuration and command reference guides, and additional documents are available for the SOHO 70 and Cisco 800 series routers on Cisco.com and the Documentation CD-ROM.

Cisco 800 Series and SOHO 77 Routers

Documents specific to the Cisco 800 series and SOHO 77 routers are on Cisco.com and the Documentation CD-ROM:

Technical Documents: Documentation Home Page: Access Servers and Access Routers: Fixed  Configuration Access Routers: <platform_name> 

Software Configuration

The document Cisco Router Web Setup User Guide is available for the Cisco 800 series and SOHO 77 routers on Cisco.com and the Documentation CD-ROM at:

Technical Documents: Router Configuration Tools: Cisco Router Web Setup 

Feature Modules

Feature modules describe new features supported by Release 12.2 and are updates to the Cisco IOS documentation set. A feature module consists of a brief overview of the feature, benefits, configuration tasks, and a command reference. As updates, the feature modules are available online only. Feature module information is incorporated in the next printing of the Cisco IOS documentation set.

To reach the Release 12.2 feature modules from Cisco.com Documentation CD-ROM, click this path (under the heading Service & Support):

 Technical Documents: Cisco IOS Software: Release 12.2: New Feature Documentation: 
New Features in 12.2-Based Limited Lifetime Releases: New Features in 12.2X Releases 

Feature Navigator

Feature Navigator is a web-based tool that enables you to quickly determine which Cisco IOS software images support a particular set of features and which features are supported in a particular Cisco IOS image. Feature Navigator is available 24 hours a day, 7 days a week.

To access Feature Navigator, you must have an account on Cisco.com. If you have forgotten or lost your account information, e-mail the Contact Database Administration group at cdbadmin@cisco.com. If you do not have an account on Cisco.com, go to http://www.cisco.com/register and follow the directions to set up an account.

To use Feature Navigator, you must have a JavaScript-enabled web browser such as Netscape 3.0 or later, or Internet Explorer 4.0 or later. Internet Explorer 4.0 always has JavaScript enabled. To enable JavaScript for Netscape 3.x or Netscape 4.x, follow the instructions provided with the web browser. For JavaScript support and enabling instructions for other browsers, check with the browser vendor.

Feature Navigator is updated when major Cisco IOS software releases and technology releases occur. You can access Feature Navigator at the following URL:

http://www.cisco.com/go/fn 

Cisco IOS Software Documentation Set

The Cisco IOS software documentation set consists of the Cisco IOS configuration guides, Cisco IOS command references, and several other supporting documents. The Cisco IOS software documentation set is shipped with your order in electronic form on the Documentation CD-ROM—unless you specifically ordered the printed versions.

Documentation Modules

Each module in the Cisco IOS documentation set consists of one or more configuration guides and one or more corresponding command references. Chapters in a configuration guide describe protocols, configuration tasks, and Cisco IOS software functionality, and contain comprehensive configuration examples. Chapters in a command reference provide complete command syntax information. Use each configuration guide with its corresponding command reference. The Cisco IOS software documentation set is available on Cisco.com and on the Documentation CD-ROM (under the heading Service & Support) at:

Technical Documents: Cisco IOS Software: Release 12.2: Configuration Guides and  Command References 

Release 12.2 Documentation Set

Table 12 lists the contents of the Cisco IOS Release 12.2 software documentation set, which is available in both electronic and printed form (under the heading Service & Support) on Cisco.com and on the Documentation CD-ROM:

Technical Documents: Cisco IOS Software: Release 12.2 


Note You can find the most current Cisco IOS documentation on Cisco.com and the Documentation CD-ROM. These electronic documents may contain updates and modifications made after the hard-copy documents were printed.


Table 12 Cisco IOS Release 12.2 Documentation Set 

Books
Major Topics

Cisco IOS Configuration Fundamentals Configuration Guide

Cisco IOS Configuration Fundamentals Command Reference

Cisco IOS User Interfaces
File Management
System Management

Cisco IOS Bridging and IBM Networking Configuration Guide

Cisco IOS Bridging and IBM Networking Command Reference, Volume 1 of 2

Cisco IOS Bridging and IBM Networking Command Reference, Volume 2 of 2

Transparent Bridging
SRB
Token Ring Inter-Switch Link
Token Ring Route Switch Module
RSRB
DLSw+
Serial Tunnel and Block Serial Tunnel
LLC2 and SDLC
IBM Network Media Translation
SNA Frame Relay Access
NCIA Client/Server
Airline Product Set
DSPU and SNA Service Point
SNA Switching Services
Cisco Transaction Connection
Cisco Mainframe Channel Connection
CLAW and TCP/IP Offload
CSNA, CMPC, and CMPC+
TN3270 Server

Cisco IOS Dial Technologies Configuration Guide

Cisco IOS Dial Technologies Command Reference

Preparing for Dial Access
Modem and Dial Shelf Configuration and Management
ISDN Configuration
Signaling Configuration
Dial-on-Demand Routing Configuration
Dial Backup Configuration
Dial Related Addressing Service
Virtual Templates, Profiles, and Networks
PPP Configuration
Callback and Bandwidth Allocation Configuration
Dial Access Specialized Features
Dial Access Scenarios

Cisco IOS Interface Configuration Guide

Cisco IOS Interface Command Reference

LAN Interfaces
Serial Interfaces
Logical Interfaces

Cisco IOS IP Configuration Guide

Cisco IOS IP Command Reference, Volume 1 of 3: Addressing and Services

Cisco IOS IP Command Reference, Volume 2 of 3: Routing Protocols

Cisco IOS IP Command Reference, Volume 3 of 3: Multicast

IP Addressing and Services
IP Routing Protocols
IP Multicast

Cisco IOS AppleTalk and Novell IPX Configuration Guide

Cisco IOS AppleTalk and Novell IPX Command Reference

AppleTalk
Novell IPX

Cisco IOS Apollo Domain, Banyan VINES, DECnet, ISO CLNS, and XNS Configuration Guide

Cisco IOS Apollo Domain, Banyan VINES, DECnet, ISO CLNS, and XNS Command Reference

Apollo Domain
Banyan VINES
DECnet
ISO CLNS
XNS

Cisco IOS Voice, Video, and Fax Configuration Guide

Cisco IOS Voice, Video, and Fax Command Reference

Voice over IP
Call Control Signaling
Voice over Frame Relay
Voice over ATM
Telephony Applications
Trunk Management
Fax, Video, and Modem Support

Cisco IOS Quality of Service Solutions Configuration Guide

Cisco IOS Quality of Service Solutions Command Reference

Packet Classification
Congestion Management
Congestion Avoidance
Policing and Shaping
Signaling
Link Efficiency Mechanisms

Cisco IOS Security Configuration Guide

Cisco IOS Security Command Reference

AAA Security Services
Security Server Protocols
Traffic Filtering and Firewalls
IP Security and Encryption
Passwords and Privileges
Neighbor Router Authentication
IP Security Options
Supported AV Pairs

Cisco IOS Switching Services Configuration Guide

Cisco IOS Switching Services Command Reference

Cisco IOS Switching Paths
NetFlow Switching
Multiprotocol Label Switching
Multilayer Switching
Multicast Distributed Switching
Virtual LANs
LAN Emulation

Cisco IOS Wide-Area Networking Configuration Guide

Cisco IOS Wide-Area Networking Command Reference

ATM
Broadband Access
Frame Relay
SMDS
X.25 and LAPB

Cisco IOS Mobile Wireless Configuration Guide

Cisco IOS Mobile Wireless Command Reference

General Packet Radio Service

Cisco IOS Terminal Services Configuration Guide

Cisco IOS Terminal Services Command Reference

ARA
LAT
NASI
Telnet
TN3270
XRemote
X.28 PAD
Protocol Translation

Cisco IOS Configuration Guide Master Index

Cisco IOS Command Reference Master Index

Cisco IOS Debug Command Reference

Cisco IOS Software System Error Messages

New Features in 12.2-Based Limited Lifetime Releases

New Features in Release 12.2 T

Release Notes (Release note and caveat documentation for 12.2-based releases and various platforms)

 


Obtaining Documentation

The following sections provide sources for obtaining documentation from Cisco Systems.

World Wide Web

The most current Cisco documentation is available on the World Wide Web at http://www.cisco.com.  Translated documentation can be accessed at http://www.cisco.com/public/countries_languages.shtml. 

Documentation CD-ROM

Cisco documentation and additional literature are available in a CD-ROM package, which ships with your product. The Documentation CD-ROM is updated monthly and might be more current than printed documentation. The CD-ROM package is available as a single unit or as an annual subscription.

Ordering Documentation

Cisco documentation is available in the following ways:

Registered Cisco Direct Customers can order Cisco product documentation from the Networking Products MarketPlace:

http://www.cisco.com/cgi-bin/order/order_root.pl 

Registered Cisco.com users can order the Documentation CD-ROM through the online Subscription Store:

http://www.cisco.com/go/subscription 

Nonregistered Cisco.com users can order documentation through a local account representative by calling Cisco corporate headquarters (California, USA) at 408 526-7208 or, in North America, by calling 800 553-NETS(6387).

Documentation Feedback

If you are reading Cisco products documentation on the World Wide Web, you can submit technical comments electronically. Click Feedback in the toolbar and select Documentation. After you complete the form, click Submit to send it to Cisco.

You can e-mail your comments to bug-doc@cisco.com.

For your convenience, many documents contain a response card behind the front cover for submitting your comments by mail. Otherwise, you can mail your comments to the following address:

Cisco Systems, Inc.
Document Resource Connection
170 West Tasman Drive
San Jose, CA 95134-9883

We appreciate your comments.

Obtaining Technical Assistance

The following sections provide sources for obtaining technical assistance from Cisco Systems.

Cisco.com

Cisco.com is the foundation of a suite of interactive, networked services that provides immediate, open access to Cisco information and resources at anytime, from anywhere in the world. This highly integrated Internet application is a powerful, easy-to-use tool for doing business with Cisco.

Cisco.com provides a broad range of features and services to help customers and partners streamline business processes and improve productivity. Through Cisco.com, you can find information about Cisco and our networking solutions, services, and programs. In addition, you can resolve technical issues with online technical support, download and test software packages, and order Cisco learning materials and merchandise. Valuable online skill assessment, training, and certification programs are also available.

Customers and partners can self-register on Cisco.com to obtain additional personalized information and services. Registered users can order products, check on the status of an order, access technical support, and view benefits specific to their relationships with Cisco.

To access Cisco.com, go to the following website:

http://www.cisco.com 

Technical Assistance Center

The Cisco TAC website is available to all customers who need technical assistance with a Cisco product or technology that is under warranty or covered by a maintenance contract.

Contacting TAC by Using the Cisco TAC Website

If you have a priority level 3 (P3) or priority level 4 (P4) problem, contact TAC by going to the TAC website:

http://www.cisco.com/tac 

P3 and P4 level problems are defined as follows:

P3—Your network performance is degraded. Network functionality is noticeably impaired, but most business operations continue.

P4—You need information or assistance on Cisco product capabilities, product installation, or basic product configuration.

In each of the above cases, use the Cisco TAC website to quickly find answers to your questions.

To register for Cisco.com, go to the following website:

http://www.cisco.com/register/ 

Cisco.com registered users who cannot resolve a technical issue by using the TAC online resource can open a case online by using the TAC Case Open tool at the following website:

http://www.cisco.com/tac/caseopen 

Contacting TAC by Telephone

If you have a priority level 1(P1) or priority level 2 (P2) problem, contact TAC by telephone and immediately open a case. To obtain a directory of toll-free numbers for your country, go to the following website:

http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml 

P1 and P2 level problems are defined as follows:

P1—Your production network is down, causing a critical impact to business operations if service is not restored quickly. No workaround is available.

P2—Your production network is severely degraded, affecting significant aspects of your business operations. No workaround is available.