Table of Contents

Contents
System Requirements

Memory Requirements
Hardware Supported

Cisco 801-804 Routers
Cisco 805 Router
Cisco 827 and Cisco 827-4V Routers

Determining Your Software Release
Upgrading to a New Software Release
Feature Set Tables

New and Changed Information

New Software Features in Release 12.1(3)XG

Prefix Dialing
Supplementary Telephone Services for the Euro-ISDN Switch
Configuring Caller ID for the Euro-ISDN Switch
Call Forwarding for the Euro-ISDN Switch
Configuring the Call Forwarding Method
Configuring the Call Forwarding Service
Configuring CLIR
PPP over Ethernet Support on Cisco 820 Series Routers
Cisco 820 Supported Features

New Software Features in Release 12.1(1)

Limitations and Restrictions

Cisco 800 Series Router Supported MIBs
Cisco 820 Series Router Supported MIBs

Important Notes

B Channel Activation
Cisco 800 Series Router Clock—CSCdp09409
Cisco 800 Series Router Enhancements
CiscoView Application Support
Dial Peer Limitation
Downloading Images
Excessive ISDN Line Activation
Hanging During Boot
ISDN NI1 Provisioning
Multilink PPP and Interleaving
NAT Support for H.323 Signaling
Phone Mate Answering Machine Model 9200
PPP over Frame Relay Support (RFC-1973)
TACACS+ with AAA
ROM Monitor set stop-bits Parameter

Caveats

Caveats for Release 12.1(3)XG

Miscellaneous

Related Documentation

Release-Specific Documents
Platform-Specific Documents

Cisco 801-804 Routers
Cisco 805 Routers
Cisco 827 Routers

Feature Modules
Cisco IOS Software Documentation Set

Documentation Modules
Release 12.1 Documentation Set

Obtaining Documentation

World Wide Web
Documentation CD-ROM
Ordering Documentation

Obtaining Technical Assistance

Cisco Connection Online
Technical Assistance Center
Configuration Tips on the Cisco Technical Assistance Center Home Page
Documentation Feedback

Release Notes for the Cisco 800 Series Routers for Cisco IOS Release 12.1(3)XG

August 28, 2000

These release notes describe new features and significant software components for the Cisco 800 Series Routers that support Cisco IOS Release Release 12.1(3)XG. These release notes are updated as needed to describe new memory requirements, new features, new hardware support, software platform deferrals, microcode or modem code changes, related document changes, and any other important changes. Use these release notes with the C ross-Platform Release Notes for Cisco IOS  Release 12.1  located on CCO and the Documentation CD-ROM.

For a list of the software caveats that apply to Release 12.1(3)XG, refer to the section "Caveats" and to the online Caveats for Cisco IOS Release 12.1 T  document. The caveats document is updated for every 12.1 T maintenance release and is located on Cisco Connection Online (CCO) and the Documentation CD-ROM.

Contents

These release notes discuss the following topics:

• System Requirements

• New and Changed Information

• Limitations and Restrictions

• Important Notes

• Caveats

• Related Documentation

• Obtaining Documentation

• Obtaining Technical Assistance

System Requirements

This section describes the system requirements for Release 12.1(3)XG and includes the following sections:

• Memory Requirements

• Hardware Supported

• Determining Your Software Release

• Upgrading to a New Software Release

• Feature Set Tables

Memory Requirements

This section describes the memory requirements for the Cisco IOS feature sets supported by Cisco IOS Release 12.1(3)XG on the Cisco 800 Series Routers.

Table 1: Memory Requirements for the Cisco 800 Series Routers

Platforms	Image Name	Image	Required Flash Memory	Required DRAM Memory	Runs From
Cisco 801-804 routers	Cisco 800 Series IOS IP	c800-y6-mw	8 MB	4 MB	RAM
	Cisco 800 Series IOS IP Plus	c800-sy6-mw	8 MB	8 MB	RAM
	Cisco 800 Series IOS IP/FW	c800-oy6-mw	8 MB	4 MB	RAM
	Cisco 800 Series IOS IP/FW Plus IPSec 56	c800-osy656i-mw	8 MB	12 MB	RAM
	Cisco 800 Series IOS IP/IPX Plus	c800-nsy6-mw	8 MB	8 MB	RAM
	Cisco 800 Series IOS IP/IPX/FW Plus IPSec 56	c800-nosy656i-mw	8 MB	12 MB	RAM
	Cisco 800 Series IOS IP/FW Plus IPSec 3DES	c800-k2osy6-mw	8 MB	12 MB	RAM
	Cisco 800 Series IOS IP/IPX/FW Plus IPSec 3DES	c800-k2nosy6-mw	8 MB	12 MB	RAM
Cisco 805 routers	Cisco 805 Series IOS IP	c805-y6-mw	4 MB	8 MB	RAM
	Cisco 805 Series IOS IP Plus	c805-sy6-mw	4 MB	8 MB	RAM
	Cisco 805 Series IOS IP/FW	c805-oy6-mw	4 MB	8 MB	RAM
	Cisco 805 Series IOS IP/FW Plus IPSec 56	c805-osy656i-mw	8 MB	12 MB	RAM
	Cisco 805 Series IOS IP/IPX Plus	c805-nsy6-mw	8 MB	8 MB	RAM
	Cisco 805 Series IOS IP/IPX/FW Plus IPSec 56	c805-nosy656i-mw	8 MB	12 MB	RAM
Cisco 805 routers (continued)	Cisco 805 Series IOS IP/FW Plus IPSec 3DES	c805-k2osy6-mw	8 MB	12 MB	RAM
	Cisco 805 Series IOS IP/IPX/FW Plus IPSec 3DES	c805-k2nosy6-mw	8 MB	12 MB	RAM
Cisco 827 and Cisco 827-4V routers	Cisco 820 Series IOS IP	c820-y6-mz	8 MB	16 MB	RAM
	Cisco 820 Series IOS IP/Voice	c820-v6y6-mz	8 MB	24 MB	RAM
	Cisco 820 Series IOS IP/FW Plus IPSec 56	c820-osy656i-mz	8 MB	16 MB	RAM
	Cisco 820 Series IOS IP/FW/Voice Plus IPSec 56	c820-osv6y656i-mz	8 MB	24 MB	RAM
	Cisco 820 Series IOS IP/IPX/Voice Plus	c820-nsv6y6-mz	8 MB	24 MB	RAM
	Cisco 820 Series IOS IP/FW Plus IPSec 3DES	c820-k2osy6-mz	8 MB	24 MB	RAM
	Cisco 820 Series IOS IP/IPX/FW Plus IPSec 3DES	c820-k2nosy6-mz	8 MB	24 MB	RAM
	Cisco 820 Series IOS IP/FW/Voice Plus IPSec 3DES	c820-k2nosv6y6-mz	8 MB	24 MB	RAM

Hardware Supported

Cisco IOS Release 12.1(3)XG supports the following Cisco 800 series routers:

• Cisco 801-804

• Cisco 805

• Cisco 827 and Cisco 827-4V

For detailed descriptions of new hardware features, see New and Changed Information.

Cisco 801-804 Routers

The Cisco 801-804 routers provide the following key hardware features:

• Cisco 802 and Cisco 804 routers have an integrated NT-1, which eliminates the need for an external NT-1 in North America.

• Cisco 803 and Cisco 804 routers provide connection to analog telephones or fax machines, which are connected to telephone services through an ISDN line.

• Flash memory: Default is 8 MB, expandable to 12 MB. (4MB Flash soldered to the motherboard.)

Note   To add additional Flash memory to the Cisco 801-804, you will remove the existing Flash card and install a the new one.

• Dynamic RAM: Default is 4 MB, expandable to 12 MB. (4MB Dynamic RAM soldered to the motherboard.)

• ISDN B-channel LEDs are a different color from the other LEDs, which make them easy to distinguish.

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

• Routers can be stacked or mounted on a wall.

Cisco 805 Router

The Cisco 805 router connects small professional offices over serial lines to corporate networks and to the Internet. Table 2 summarizes Cisco 805 router ports.

Table 2: Cisco 805 Router Ports

Port Type	Description
Ethernet Port	One 10BaseT (RJ-45)
Serial Port	One WAN interface (RS-232, RS-449, RS-530 and RS-530A, V.35, and X.21)
Console Port	RJ-45

Cisco 827 and Cisco 827-4V Routers

The 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 827 Router 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.

• Routers can be stacked or mounted on a wall.

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

Table 3: Supported Interfaces for the Cisco 827 and Cisco 827-4V Router

Router	Ethernet Ports	ADSL Ports	Telephone Ports	Console Ports
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 3 lists the supported interfaces for the Cisco 827 and Cisco 827-4V routers.

Determining Your Software Release

To determine the version of Cisco IOS software currently running on your Cisco 800 series router, log in to the router and enter the show version EXEC command. The following sample output from the show version command indicates the version number on the second output line:

router> show version
Cisco Internetwork Operating System Software 
IOS (tm) 800 Software (c800-y6-mw), Version 12.1(2)XF, RELEASE SOFTWARE
 

Additional command output lines include more information, such as processor revision numbers, memory amounts, hardware IDs, and partition information.

Upgrading to a New Software Release

For information about upgrading to a new software release, refer to the Cisco IOS Upgrade Ordering Instructions product bulletin located at the following URL: http://www.cisco.com/warp/public/cc/cisco/mkt/ios/prodlit/957_pp.htm.  

Alternatively, the Cisco IOS Software page on CCO has a variety of information, including upgrade information, organized by release. If you have a CCO account and log in, you can go directly to: http://www.cisco.com/kobayashi/sw-center/sw-ios.shtml.  

If you have a CCO account and log in, you can reach the new software release upgrade page by going to www.cisco.com  and following this path: Service & Support: Software Center: Cisco IOS Software: Product Bulletins: Software: General System Software Bulletins: Cisco IOS Upgrade Ordering Instructions, No. 957

You can also reach the Cisco IOS Upgrade Planner, which allows you more flexibility to browse for your preferred software, by going to www.cisco.com  and following this path: Service & Support: Software Center: IOS Upgrade Planner.

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 12.1(3)XG supports the same feature sets as Releases 12.1 and 12.1 T, but Release 12.1(3)XG can include new features supported by the Cisco 800 Series Routers. Table 4 lists the feature sets supported by the Cisco 800 Series Routers.

Table 4: Feature Sets Supported by the Cisco 800 Series Routers

Image Name	Feature Set Matrix Terms	Software Image	Platform
Cisco 800 Series IOS IP	IP	c800-y6-mw	Cisco 801-804 routers
Cisco 800 Series IOS IP Plus	IP, Plus	c800-sy6-mw
Cisco 800 Series IOS IP/FW	IP, FW	c800-oy6-mw
Cisco 800 Series IOS IP/FW Plus IPSec 56	IP, FW, Plus, IPSec 56	c800-osy656i-mw
Cisco 800 Series IOS IP/IPX Plus	IP, IPX, Plus	c800-nsy6-mw
Cisco 800 Series IOS IP/IPX/FW Plus IPSec 56	IP, IPX, FW, Plus, IPSec 56	c800-nosy656i-mw
Cisco 800 Series IOS IP/FW Plus IPSec 3DES	IP, FW, Plus, IPSec, 3DES	c800-k2osy6-mw
Cisco 800 Series IOS IP/IPX/FW Plus IPSec 3DES	IP, IPX, FW, Plus, IPSec, 3DES	c800-k2nosy6-mw
Cisco 805 Series IOS IP	IP	c805-y6-mw	Cisco 805 routers
Cisco 805 Series IOS IP Plus	IP, Plus	c805-sy6-mw
Cisco 805 Series IOS IP/FW	IP, FW	c805-oy6-mw
Cisco 805 Series IOS IP/FW Plus IPSec 56	IP, FW, Plus, IPSec 56	c805-osy656i-mw
Cisco 805 Series IOS IP/IPX Plus	IP, IPX, Plus	c805-nsy6-mw
Cisco 805 Series IOS IP/IPX/FW Plus IPSec 56	IP, IPX, FW, Plus, IPSec 56	c805-nosy656i-mw
Cisco 805 Series IOS IP/FW Plus IPSec 3DES	IP, FW, Plus, IPSec, 3DES	c805-k2osy6-mw
Cisco 805 Series IOS IP/IPX/FW Plus IPSec 3DES	IP, IPX, FW, Plus, IPSec, 3DES	c805-k2nosy6-mw
Cisco 820 Series IOS IP	IP	c820-y6-mz	Cisco 827 and Cisco 827-4V routers
Cisco 820 Series IOS IP/Voice	IP, Voice	c820-v6y6-mz
Cisco 820 Series IOS IP/FW Plus IPSec 56	IP, FW, Plus, IPSec 56	c820-osy656i-mz
Cisco 820 Series IOS IP/FW/Voice Plus IPSec 56	IP, FW, Voice, Plus, IPSec 56	c820-osv6y656i-mz
Cisco 820 Series IOS IP/IPX/Voice Plus	IP, IPX, Voice, Plus	c820-nsv6y6-mz
Cisco 820 Series IOS IP/FW Plus IPSec 3DES	IP, FW, Plus, IPSec, 3DES	c820-k2osy6-mz
Cisco 820 Series IOS IP/IPX/FW Plus IPSec 3DES	IP, IPX, FW, Plus, IPSec, 3DES	c820-k2nosy6-mz
Cisco 820 Series IOS IP/FW/Voice Plus IPSec 3DES	IP, FW, Voice, Plus, IPSec, 3DES	c820-k2nosv6y6-mz

Table 5 and Table 6 list the features and feature sets supported by the Cisco 801-804 routers in Cisco IOS Release 12.1(3)XG. Table 7 lists the features and feature sets supported by the Cisco 805 routers in Cisco IOS Release 12.1(3)XG. Table 8 lists the features and feature sets supported by the Cisco 827 and Cisco 827-4V routers in Cisco IOS Release 12.1(3)XG.

Each table uses 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, (2) means a feature was introduced in 12.1(2)T. If a cell in this column is empty, the feature was included in 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 5: Feature List by Feature Set for the Cisco 801-804 Routers

	In	Feature Set
Features		IP	IP/Plus	IP/FW	IP/FW/Plus/ IPSec 56	IP/IPX/Plus	IP/IPX/ FW/Plus/ IPSec 56	IP/FW/ Plus/ IPSec/ 3DES	IP/IPX/FW/ Plus/IPSec/ 3DES
Address Conservation
PAT (NAT Overload)		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
NAT		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
NAT with H.323		No	No	No	No	No	No	No	No
Advanced Telephone Features1
Call Forward (Sweden and Finland only)		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Call Forward Variable (North America, Denmark, and Finland only)		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Call Hold Retrieve (North America, Denmark, and Finland only)		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Call Transfer (North America and Finland only)		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Call Waiting		Yes	Yes	Yes	Yes	No	Yes	Yes	Yes
Caller ID Number delivery to POTS ports (North America, Denmark, Sweden, and Finland only)		Yes	Yes	Yes	Yes	Yes	Yes	No	Yes
Caller ID Name delivery to POTS ports (North America only)		No	No	No	No	Yes	No	Yes	Yes
Caller ID Restriction (Denmark, Finland, and Sweden only)	(3)XG	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Calling Line Identification Restriction (CLIR) - Temporary Mode (Denmark and Finland only)	(3)XG	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Data-Over-Voice Bearer (North America only)		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Distinctive Ringing		Yes	Yes	Yes	Yes	No	Yes	Yes	Yes
ISDN-Voice Priority		Yes	Yes	Yes	Yes	No	Yes	Yes	Yes
Prefix Dialing2	(3)XG	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Basic Services
GRE Tunneling		No	Yes	No	Yes	Yes	Yes	Yes	Yes
NAT		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
PAP, CHAP, MSCHAP, Local Password		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Dial
Common Application Programming Interface (CAPI)	(2)	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Ease of Use and Deployment
Auto SPID / Switch Detection		Yes	Yes	Yes	Yes	Yes	Yes	No	Yes
Cisco ConfigMaker		Yes	Yes	Yes	Yes	Yes	Yes	No	Yes
Cisco FastStep		Yes	Yes	Yes	Yes	Yes	Yes	No	Yes
Easy IP Phase I and II (IPCP Address Negotiation and DHCP Server)		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
TFTP Client and Server		Yes	Yes	Yes	Yes	Yes	Yes	No	Yes
IP Routing Protocols
OSPF Flooding Reduction	(2)	No	No	No	No	No	No	No	No
LAN
AppleTalk		No	No	No	No	No	No	No	No
IP		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
IPX		No	No	No	No	No	Yes	No	No
NetBIOS Access Lists		Yes	Yes	Yes	Yes	Yes	Yes	No	Yes
Transparent Bridging		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Management
Cisco View		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Service Assurance Agent	(3)XG	No	Yes	No	Yes	Yes	Yes	Yes	Yes
SNMP, Telnet, Console Port		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
SNTP		Yes	Yes	Yes	Yes	No	Yes	No	No
Syslog		No	Yes	No	Yes	Yes	Yes	Yes	Yes
Routing
BGP		No	No	No	No	No	No	No	No
EGP		No	No	No	No	No	No	No	No
IGRP		No	No	No	No	No	No	No	No
IP Enhanced IGRP (IP-EIGRP)		No	Yes	No	Yes	Yes	Yes	Yes	Yes
IPX Enhanced IGRP (IPX-EIGRP)		No	No	No	No	No	No	No	No
IP Multicast (relay only)		No	Yes	No	Yes	Yes	Yes	Yes	Yes
IP-Policy Routing		No	Yes	No	Yes	Yes	Yes	Yes	Yes
IPXWAN		No	No	No	No	Yes	Yes	No	Yes
OSPF		No	No	No	No	No	No	No	No
RIP, RIPv2, Triggered RIP		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
XOT		No	No	No	No	No	No	No	No
Security
AAA Radius		No	No	No	No	No	No	No	No
AAA TACACS+		No	Yes	No	Yes	No	Yes	No	No
Additional Vendor-Proprietary RADIUS Attributes		No	No	No	No	No	No	No	No
Authenticating ACL		No	No	No	No	No	No	No	No
Automated Double Authentication (server functionality)		No	No	No	No	No	No	No	No
Certificate Authority Interoperability		No	No	No	Yes	No	Yes	Yes	Yes
Internet Key Exchange Security Protocol		No	No	No	Yes	No	Yes	Yes	Yes
IPSec Network Security		No	No	No	Yes	Yes	Yes	Yes	Yes
IOS Firewall Phase I
Context Based Access Control Lists		No	No	Yes	Yes	No	Yes	Yes	Yes
Java Blocking		No	No	Yes	Yes	No	Yes	Yes	Yes
Denial of Service Detection and Prevention		No	No	Yes	Yes	No	Yes	Yes	Yes
Real-time Alerts and Audit Trails		No	No	Yes	Yes	No	Yes	Yes	Yes
IPSec Encryption with 56 bit DES		No	No	No	Yes	No	Yes	No	No
IPSec Encryption with 168 bit DES (3DES)		No	No	No	No	No	No	Yes	Yes
Lock and Key		Yes	Yes	Yes	Yes	No	Yes	No	No
LT2P		No	No	No	Yes	No	Yes	Yes	Yes
Named Method Lists for AAA Authentication & Accounting		No	No	No	No	No	No	No	No
Route and Router Authentication		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Token Card - Double Authentication		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
WAN
Frame Relay Encapsulation (for ISDN LL and ISDN Dial)	(3)XG	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
ISDN Digital Subscriber Line (IDSL, up to 144 kbps) (Cisco 802 & Cisco 804 only)		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Frame Relay Inverse ARP		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
ISDN		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
ISDN Leased Line (up to 144 kbps)		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
ML-PPP, PPP Compression		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
PPP over Frame Relay (RFC 1973)		No	No	No	No	No	No	No	No
WAN Optimization
Always On/Dynamic ISDN (AO/DI)		No	Yes	No	Yes	Yes	Yes	Yes	Yes
Bandwidth on Demand (BOD)		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Dial on Demand (DDR)		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
HSRP		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
IPX and SPX Spoofing		No	No	No	No	Yes	Yes	No	Yes
ISDN Caller ID Callback		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Snapshot Routing		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Stac Compression		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Time-based Access Lists		Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
X.25 ID		No	Yes	No	Yes	Yes	Yes	Yes	Yes

1Advanced Telephone Features are available on the Cisco 803 and 804 routers only. These features require supplementary services from a telephone company. 2Prefix Dialing is supported on Cisco 803 and Cisco 804 routers only.

New and Changed Information

The following sections list the new hardware and software features supported by the Cisco 800 series for Release 12.1 T:

New Software Features in Release 12.1(3)XG

The following sections list the new software features supported by the Cisco Cisco 800 Series Routers for Release 12.1(3)XG.

Prefix Dialing

Cisco 803 and Cisco 804 routers now support prefix dialing. You can add a telephone prefix and create a prefix filter to the dialed number for analog telephone calls. When a telephone number is dialed through the telephone port, the router checks for prefix filters. If the router finds a match, no prefix is added to the dialed number. If no filter match is found, the router adds the user-defined prefix to the called number.

Configuring a Prefix Number

To set a prefix to be added to a telephone number called, use the Cisco IOS pots prefix number command in global configuration mode:

pots prefix number number

no pots prefix number

where number is a prefix number from one to five digits in length. Only one prefix can be configured at a time, and configuring a new number overwrites the existing one.

The following example sets the prefix number to 12345:

router# configure terminal
router(config)# pots prefix number 12345

Configuring a Prefix Filter

You can configure a prefix filter that is compared to the digits that you dial. If a match occurs, the prefix number is not added to the called number. To create a prefix filter, use the pots prefix filter command in global configuration mode:

pots prefix filter number

no pots prefix filter number

where number is a prefix filter from one to eight digits in length. You can define up to ten filters for your router. If you have reached the maximum number of filters defined, no new filter configurations are accepted until you remove at least one existing filter number using the no pots prefix filter number command.

The following are examples of how to set prefix filters:

router# configure terminal
router(config)# pots prefix filter 192
router(config)# pots prefix filter 1
router(config)# pots prefix filter 9
router(config)# pots prefix filter 0800
router(config)# pots prefix filter 08456

Supplementary Telephone Services for the Euro-ISDN Switch

The Cisco 800 series routers now support the following plain old telephone service (POTS) features for the European Telecommunications Standards Institute (ETSI) Euro-ISDN switch type:

• Caller ID presentation and restriction are available for Denmark, Finland, and Sweden. For more information, see "Configuring Caller ID for the Euro-ISDN Switch."

• Calling line identification restriction (CLIR) temporarily prevents your calling ID from being presented to the destination number for an outgoing call. You must configure CLIR prior to each call that you wish to restrict the calling party number from being presented at the destination.

• Call forwarding is enabled using Cisco IOS and dual tone multifrequency (DTMF) commands. For more information, see "Call Forwarding for the Euro-ISDN Switch."

• Call transfer feature enables you to connect two call destinations. The request for this service must originate from an active, outgoing call.

Note   The Euro-ISDN switch was previously called the Net3 switch.

Requirements for Supplementary Telephone Services Support

You must subscribe to the following Euro-ISDN switch services for these supplementary telephone services to work:

• Calling line identification presentation (CLIP)

• CLIR in temporary mode

• Call holding

• Call transfer

• Call forwarding

• Call waiting

For information about configuring caller ID calls, see the Cisco IOS documentation set.

Configuring Caller ID for the Euro-ISDN Switch

To enable caller ID on the Euro-ISDN switch for the Nordic countries (Denmark, Sweden, and Finland), configure the country type by using the Cisco IOS pots country command in global configuration mode:

pots country {denmark | finland | sweden}

To verify if caller ID is enabled, use the show pots status command. The following is an example of the output for the command:

router# show pots status
 
POTS Global Configuration:
 
   Country:Denmark
 
   Dialing Method:Overlap, Tone Source:Local, CallerId Support:YES
		----------------------
   Out Going Hunt:Disabled

Note   Caller ID for Denmark, Sweden, and Finland is always enabled, provided the POTS country type is correctly defined as one of them. Caller ID cannot be disabled using the Cisco IOS command-line interface (CLI).

Call Forwarding for the Euro-ISDN Switch

The following types of call forwarding services (for voice calls only) are supported on the Euro-ISDN switch:

• Call forward unconditional (CFU) redirects your calls without restrictions and takes precedence over other call forwarding types.

• Call forward busy (CFB) redirects your call to another number if your number is busy.

• Call forward no reply (CFNR) forwards your call to another number if your number does not answer within a specified period of time.

You can select one or more call forwarding services at a time. However, CFU has higher precedence over CFB and CFNR. If all the three are enabled, CFU overrides CFB and CFNR. The default setting is that no forwarding type is selected.

Note   If you had configured call forwarding for a POTS port and the router finds that a dial peer is also configured for that port, call forwarding works only for the number defined in the destination-pattern dial peer command and ignores all other numbers for that telephone. If the router does not find a dial peer or if the destination-pattern is not defined, call forwarding works for all numbers allocated to that telephone.

To enable and configure this feature, follow these steps:

Step 2   Configure your call forwarding service, depending on which method you selected:

• Functional method—Enter DTMF commands on the telephone keypad. For more information, see "Configuring the Call Forwarding Service."

• Keypad method—Follow the instructions in your Euro-ISDN switch documentation.

Configuring the Call Forwarding Method

You can select the method by which the call forwarding feature is controlled as follows:

• Functional method gives control to the router. If you select this method, use the DTMF commands documented in "Configuring the Call Forwarding Service."

• Keypad method gives control to the Euro-ISDN switch.

To enable the call forwarding method, use the Cisco IOS pots forwarding-method command in global configuration mode:

pots forwarding-method {functional | keypad}

[no] pots forwarding-method

Note   Use the pots forwarding-method command only if the switch is a Euro-ISDN switch type. This command does not work for other switch types. This feature is disabled in the default setting.

The following example configures the call forwarding feature to give control to the router:

router# configure terminal
router(config)# pots forwarding-method functional

Configuring the Call Forwarding Service

Table 9 shows the DTMF keypad command sequence that you enter to configure the call forwarding service.

Table 9: Configuring the Call Forwarding Service

Task	DTMF Keypad Command
Activate CFU	**21*number# where number is the telephone number to which your calls are forwarded
Deactivate CFU	#21#
Activate CFNR	**61*number# where number is the telephone number to which your calls are forwarded
Deactivate CFNR	#61#
Activate CFB	**67*number# where number is the telephone number to which your calls are forwarded
Deactivate CFB	#67#

router# show pots status
 
POTS Global Configuration:
Country:Denmark
Dialing Method:Overlap, Tone Source:Local, CallerId Support:YES
Out Going Hunt:Disabled
Forwarding Method:functional method
-------------------------------------
 
Call Forwarding status:
 
The Forwarding Method Enabled is CFU
 
The forwarded to Address is     :33236877
The served user Number(s) are   :33795742
 
The Forwarding Method Enabled is CFB
 
The forwarded to Address is     :33236877
The served user Number(s) are   :
ALL -> Will work for all numbers allocated to the terminal.

Configuring CLIR

Configure CLIR by following these steps:

Step 2   Remove handset and press **31# on the keypad.

Step 3   Listen for the dial tone and then make your call.

Step 4   Repeat Steps 2 and 3 for each outgoing call for which you wish to restrict your calling identification.

Note   The command **31# DTMF only has an effect if the switch is a Euro-ISDN switch type. This DTMF command does not have any effect on other switch types.

PPP over Ethernet Support on Cisco 820 Series Routers

Cisco IOS Release 12.1(3)XG running on Cisco 827 and Cisco 827-4V routers supports a PPP over Ethernet (PPPoE) client on an ATM permanent virtual circuit (PVC). Only one PPPoE client on a single ATM PVC is supported. The following figure depicts a typical deployment scenario for PPPoE support:

Figure 1: PPPoE Deployment Scenario

A PPPoE session is initiated on the client side by the network described above. If the session has a timeout or is disconnected, the PPPoE client immediately attempts to reestablish the session.

Follow these steps to configure the router for PPPoE client support:

   a. Enter the vpdn enable command in global configuration mode.

   b. Configure the vpdn group by entering the vpdn group tag command.

   c. Specify the dialing direction by entering the request-dialin command in the vpdn group.

   d. Specify the type of protocol in the vpdn group by entering the protocol pppoe command.

Step 2   Configure the ATM interface with PPPoE support.

   a. Configure the ATM interface by entering the interface atm 0 command.

   b. Specify the ATM PVC by entering the pvc number command.

   c. Configure the PPPoE client and specify the dialer interface to use for cloning by entering the pppoe-client dial-pool-number number command.

Step 3   Configure the dialer interface by entering the int dialer number command.

   a. Configure the IP address as negotiated by entering the ip address negotiated command.

   b. Optional: Configure authentication for your network by entering the ppp authentication protocol command.

   c. Configure the dialer pool number by entering the dialer pool number command.

   d. Configure the dialer-group number by entering the dialer-group number command.

Step 4   Configure a dialer list corresponding to the dialer-group by entering the dialer-list 1 protocol ip permit command.

Note   There can be multiple PPPoE clients, each running on different PVCs, in which case each client has to use a separate dialer interface and a separate dialer pool, and the PPP parameters need to be applied on the dialer interface.

If you enter the clear vpdn tunnel pppoe command with a PPPoE client session already established, the PPPoE client session terminates and the PPPoE client immediately tries to reestablish the session.

Configuration Example

The following example shows the configuration of a PPPoE client.

vpdn enable
vpdn-group 1
	request-dialin
protocol pppoe
 
int atm0
 
pvc 1/100
	pppoe-client dial-pool-number 1
 
int dialer 1
ip address negotiated
ppp authentication chap
dialer pool 1
dialer-group 1
 

Cisco 820 Supported Features

The Cisco 820 series routers now support firewall, IPSec, and 3DES features.

Cisco IOS Firewall Feature Set for Cisco 820 Series Routers

The Cisco IOS Firewall feature set is now available on the Cisco 820 series routers. This feature set provides the following capabilities:

• Context-based Access Control (CBAC)

• Java blocking

• Denial-of-service detection and prevention

• Real-time alerts and audit trails

The Cisco IOS Firewall Feature Set feature module provides several sample firewall configurations, including the following examples for small-office environments:

• IP network to Internet

• Remote office network to corporate office network

IPSec and 3DES Feature Set for Cisco 820 Series Routers

The Internet Protocol Security (IPSec) feature is now available on the Cisco 820 series routers. IPSec is a framework of open standards developed by the Internet Engineering Task Force (IETF) that provides security for transmission of sensitive information over unprotected networks such as the Internet. It acts at the network level and implements the following standards:

• IPSec

• Internet Key Exchange (IKE)

• Data Encryption Standard (DES)

• Message Digest 5 (MD5)

• Secure Hash Algorithm (SHA)

• Authentication Header (AH)

• Encapsulating Security Payload (ESP)

Internet Protocol Security (IPSec) services are similar to those provided by Cisco Encryption Technology (CET), a proprietary security solution introduced in Cisco IOS Software Release 11.2. (The IPSec standard was not yet available at Release 11.2.) It provides network data encryption at the IP packet level and implements the following standards:

• Digital Signature Standard (DSS)

• Diffie-Hellman (DH) public key algorithm

• Data Encryption Standard (DES)

IPSec provides a more robust security solution and is standards-based. IPSec also provides data authentication and anti-replay services in addition to data confidentiality services, while CET provides only data-confidentiality services.

The following component technologies implemented for IPSec:

• The Data Encryption Standard (DES) is used to encrypt packet data.

• Cipher Block Chaining (CBC) requires an initialization vector (IV) to start encryption. The IV is explicitly given in the IPSec packet.

• MD5 and SHA are hash algorithms.

Triple Data Encryption Standard Feature Set for Cisco 820 Series Routers

The Triple Data Encryption Standard (3DES) Cisco IOS feature is now available on Cisco 820 series routers. This feature encrypts packet data. Cisco IOS implements the mandatory 56-bit DES-Cipher Block Chaining (CBC) with an Explicit initialization vector (IV).

New Software Features in Release 12.1(1)

For information regarding the features supported in Cisco IOS Release 12.1, refer to the Cross-Platform Release Notes and New Feature Documentation links at the following location on CCO:

http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/index.htm

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

Service & Support: Technical Documents: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 12.1: Cisco IOS Release 12.1

Limitations and Restrictions

Cisco 800 Series Router Supported MIBs

Table 10 lists the MIBs supported by the Cisco 800 series routers. Each group of MIBs corresponds to a specific group of images.

Table 10: MIBs Supported by the Cisco 800 Series Routers 

Image Names	MIBs
c800-sy6-mw c800-osy6-mw c800-osy656i-mw c800-nsy6-mw c800-nosy656i-mw c800-osy6-mw	CISCO-IPMROUTE-MIB CISCO-SYSLOG-MIB ENTITY-MIB (added) IPMROUTE-MIB RFC1382-MIB (X25MIB)
c800-nsy6-mw c800-nosy656i-mw	NOVELL-IPX-MIB NOVELL-RIPSAP-MIB OLD-CISCO-NOVELL-MIB
c800-osy656i-mw c800-nosy656i-m	CISCO-IP-ENCRYPTION-MIB
c800-y6-mw c800-oy6-mw c800-sy6-mw c800-osy6-mw c800-osy656i-mw c800-nsy6-mw c800-nosy656i-mw	CISCO-BULK-FILE-MIB
	CISCO-CALL-HISTORY-MIB
	CISCO-CAR-MIB
	CISCO-IMAGE-MIB (added)
	CISCO-IP-STAT-MIB
	CISCO-ISDN-MIB
	CISCO-ISDNU-IF-MIB
	CISCO-MEMORY-POOL-MIB
	CISCO-PING-MIB
	CISCO-SNAPSHOT-MIB
	CISCO-TCP-MIB
	OLD-CISCO-CHASSIS-MIB
	OLD-CISCO-CPU-MIB
(continued)   c800-y6-mw   c800-oy6-mw   c800-sy6-mw   c800-osy6-mw   c800-osy656i-mw   c800-nsy6-mw   c800-nosy656i-mw	OLD-CISCO-FLASH-MIB (added)
	OLD-CISCO-INTERFACES-MIB
	OLD-CISCO-IP-MIB
	OLD-CISCO-MEMORY-MIB
	OLD-CISCO-SYSTEM-MIB
	OLD-CISCO-TCP-MIB
	IF-MIB
	ISDN-MIB
	SNMPv2-MIB
	TCP-MIB
	UDP-MIB
	RFC1213-MIB (MIBII)
	RFC1381-MIB (LAPBMIB)
	RFC1398-MIB (ETHERMIB)

Cisco 820 Series Router Supported MIBs

The following MIBs are supported by the Cisco 820 series routers, including the Cisco 827 and Cisco 827-4V routers:

• ADSL-LINE-MIB

• ADSL-DMT-LINE-MIB

• ATM-FORUM-MIB (not supported per Jenness)

• ATM-FORUM-ADDR-REG (not supported per Jenness)

• ATM-MIB

• CISCO-AAL5-MIB

• CISCO-ADSL-DMT-LINE-MIB

• CISCO-ATM-EXT-MIB

• CISCO-BULK-FILE-MIB

• CISCO-CAR-MIB

• CISCO-DIAL-CONTROL-MIB

• CISCO-FLASH-MIB

• CISCO-IETF-ATM2-PVCTRAP-MIB

• CISCO-IMAGE-MIB

• CISCO-IP-STAT-MIB

• CISCO-MEMORY-POOL-MIB

• CISCO-PING-MIB

• CISCO-QUEUE-MIB

• CISCO-RAS-MIB

• CISCO-SNAPSHOT-MIB

• CISCO-STACKMAKER-MIB

• CISCO-SYSLOG-MIB

• CISCO-TCP-MIB

• CISCO-VOICE-ANALOG-IF-MIB

• CISCO-VOICE-COMMON-DIAL-CONTROL-MIB

• CISCO-VOICE-DIAL-CONTROL-MIB

• CISCO-VOICE-IF-MIB

• DIAL-CONTROL-MIB

• ENTITY-MIB

• IF-MIB

• IGMP-MIB

• INT-SERV-GUARANTEED-MIB

• INT-SERV-MIB

• IPMROUTE-MIB

• NOVELL-IPX-MIB

• NOVELL-RIPSAP-MIB

• OLD-CISCO-CHASSIS-MIB

• OLD-CISCO-CPU-MIB

• OLD-CISCO-INTERFACE-MIB

• OLD-CISCO-IP-MIB

• OLD-CISCO-MEMORY-MIB

• OLD-CISCO-NOVELL-MIB

• OLD-CISCO-SYSTEM-MIB

• OLD-CISCO-TCP-MIB

• PIM-MIB

• RFC1398-MIB (ETHERMIB)

• RFC1213-MIB

• RSVP-MIB

• SNMPv2-MIB

• TCP-MIB

• UDP-MIB

• XGCP-MIB

Important Notes

The following sections contain important notes about Cisco IOS Release 12.1(3)XG that can apply to the Cisco 800 Series Routers. (Also, see the "Caveats" section.)

B Channel Activation

When a call comes in, a B channel is activated. If the amount of traffic on the B channel exceeds a threshold, the other B channel is activated. If the amount of traffic falls below the threshold, one of the B channels is deactivated. The B channel that is initially activated when the call comes in is not necessarily B1 nor is the B channel that is deactivated when the traffic level lessens necessarily B2.

Cisco 800 Series Router Clock—CSCdp09409

To run IPSec successfully, the Cisco 800 series router clock needs to be set accurately. Cisco 800 series router clocks are set and maintained using Simple Network Time Protocol (SNTP). For best results, set up a Network Time Protocol (NTP) server to periodically send time information messages to Cisco 800 series routers. See the SNTP configuration and command reference documentation for configuration instructions. If you do not have an NTP server, you must reset the Cisco 800 series router clock using the clock set command each time you restart the router.

The SNTP configuration documentation is available in the chapter "Monitoring the Router and Network" volume of the Configuration Fundamentals Configuration   Guide  in the Cisco IOS documentation set. The SNTP command reference documentation is available in the chapter "Router and Network Monitoring Commands" in the "System Management Commands"  volume of the Configuration Fundamentals Command Reference  manual of the Cisco IOS documentation set.

Cisco 800 Series Router Enhancements

Cisco 800 series routers support the following features. For more information about these features, see the Cisco IOS documentation set.

• Hot Standby Routing Protocol (HSRP), which creates a Hot Standby router group with a lead router that services all packets sent to the Hot Standby address. The lead router is monitored by other routers in the group. If it fails, one of these standby routers inherits the lead position and the Hot Standby group address.

• Service Assurance Agent (SAA), which is both an enhancement to and a new name for the Response Time Reporter (RTR) feature that was introduced in Cisco IOS release 11.2. This feature allows you to monitor network performance by measuring key Service Level Agreement (SLA) metrics, such as response time, network resources, availability, jitter, connect time, packet loss, and application performance.

• Triple Data Encryption Standard (3DES), based on the standard cryptographic algorithm developed by the U.S. National Bureau of Standards.

• X.28, X.29, and X.3 emulation for Packet Assember/Disassembler (PAD), the standard user interface between the data terminal equipment and PAD.

• Frame Relay Inverse Address Resolution Protocol (ARP), which enables a station to request a protocol address corresponding to a given hardware address.

• Frame Relay support for a permanent virtual circuit (PVC) saves bandwidth associated with circuit establishment and tear down in situations where certain virtual circuits must exist all the time.

CiscoView Application Support

The CiscoView application supports the Cisco 800 series routers. The CiscoView application provides dynamic status, statistics, and comprehensive configuration information for Cisco switches, routers, concentrators, and adapters. It displays a graphical view of Cisco devices. This network management tool also provides configuring and monitoring functions and offers basic troubleshooting tips.

Dial Peer Limitation

The isdn answer1 and isdn answer2 commands determine which called telephone numbers, for example, 555-1111 and 555-2222, a Cisco 800 series router can answer. Using these commands limits a router to using the two dial peers that contain the telephone numbers 555-1111 and 555-2222. (When not using these commands, a router can use up to six dial peers.) A sample scenario in which the isdn answer1 and isdn answer2 commands are used is when a Cisco 801 or Cisco 803 router is connected with other ISDN devices to an ISDN S-bus.

Downloading Images

Before attempting to download new images, you must first delete files in the router Flash memory. Be sure to use the delete command, not command erase, to free up space. Entering erase removes all files, including the configuration.

Excessive ISDN Line Activation

The following protocols send updates that can cause an ISDN line to be activated excessively, thereby increasing your monthly ISDN line cost:

• IP

• User Datagram Protocol (UDP)

• IPX

• Cisco Discovery Protocol (CDP)

• Simple Network Time Protocol (SNTP)

See the Cisco 800 Series Routers Software Configuration Guide to set up extended access lists to prevent IP, UDP, IPX, and SNTP updates from activating the ISDN line. For CDP, make certain that you enter the no cdp enable command to disable CDP.

Hanging During Boot

If an illegal console configuration is issued to the router, the console fails the POST tests during boot and causes the router to halt. The only way to recover from this state is to pull apart the soldered boot Flash and re-burn the Boot ROM. This problem has been resolved in TinyROM version 1.0(3), a downloadable ROM upgrade available from CCO. Contact Cisco to upgrade to this version or later, and to prevent this problem from occurring.

ISDN NI1 Provisioning

If you have any problems with your ISDN NI1 provisioning, visit the Cisco ISDN Web site at http://www.cisco.com/isdn.

Multilink PPP and Interleaving

Multilink PPP fragments large data packets so that small voice packets can be interleaved within them. However, apart from first-in-first-out (FIFO) queuing, no other kind of output queuing mechanisms are currently supported with PPP over ATM. Consequently, when multilink PPP is configured on the Cisco 827 routers, the big packets are fragmented, but interleaving of small voice packets within them does not occur.

NAT Support for H.323 Signaling

Currently, NAT does not support alerting H.225 messages. Therefore, NAT communication cannot be established between the router end points. NAT support for H.323 signaling is limited to the Netmeeting application.

Phone Mate Answering Machine Model 9200

A Phone Mate answering machine model 9200 fails to recognize the ringing signal sent by AMD R79 ringing SLIC. This was confirmed by testing against Phone Mate model 3750 and newer model 9300.

PPP over Frame Relay Support (RFC-1973)

Cisco 800 series routers do not support PPP protocol over Frame Relay.

TACACS+ with AAA

Cisco 800 series routers support the Terminal Access Controller Access Control System Plus (TACACS+) protocol through Telnet. TACACS+ is a Cisco proprietary authentication protocol that provides remote access authentication and related network security services, such as event logging. User passwords are administered in a central database, rather than in individual routers. TACACS+ also supports separate modular authentication, authorization, and accounting (AAA) facilities that are configured at individual routers.

For information on how to configure TACACS+, refer to the "Configuring TACACS+"  chapter in the Security Configuration Guide . For information on TACACS+ commands, refer to the "TACACS,   Extended TACACS, and TACACS+ Commands"  chapter in the Security Command Reference . 

Cisco 800 series routers do not support the following protocols:

• TACACS, an older access protocol now deprecated by Cisco, or Extended TACACS, an extension to the TACACS protocol.

• RADIUS or Kerberos protocols.

ROM Monitor set stop-bits Parameter

This release supports the setting of 1 only, for the ROM monitor set stop-bits parameter.

Caveats

Caveats describe unexpected behavior or defects 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.

All caveats in Release 12.1(2)T are also in Release 12.1(3)XG. For information on caveats in Cisco IOS Release 12.1(2)T, refer to the Caveats for Cisco IOS Release 12.1 T document. For information on caveats in Cisco IOS Release 12.1, refer to the Caveats for Cisco IOS   Release  12.1  document. These publications list severity 1 and 2 caveats, and are located on CCO and the Documentation CD-ROM.

Note   If you have an account with CCO, you can use Bug Navigator II to find caveats of any severity for any release. You can reach Bug Navigator II on CCO at Software Center: Cisco IOS Software: BUG TOOLKIT: Cisco Bug Navigator II, or at http://www.cisco.com/support/bugtools/bugtool.shtml.

Caveats for Release 12.1(3)XG

This section describes possibly unexpected behavior by Release 12.1(3)XG.

Miscellaneous

• CSCdr60732

  A Cisco 800 series router running a PPPoE client configured from a dialer interface might encounter packet loss while trying to route IPX traffic or might not route IPX packets at all during the PPPoE session. To work around this problem, configure the IPX network as network X on the dialer interface.

• CSCdr60739

  A Cisco 800 router running a PPPoE client that is performing multilink PPP might fail to establish a session. There is no known workaround.

• CSCdr69152

  For IPSec to work properly on some IPSec interfaces, fast switching must be explicitly disabled by entering the commands no ip route-cache and no ip mroute-cache. This might impact IPSec functionality under certain encapsulation modes.

  For example, if you use a dialer interface to configure PPP over ATM encapsulation or PPP over Ethernet encapsulation and apply IPSec to the interface, fast switching must be explicitly disabled for IPSec to work. For a bridge group virtual interface to function properly as an IPSec interface, fast switching must also be disabled. IPSec works properly with fast switching enabled when applied on other interfaces, such as ATM or virtual interfaces.

  Fast switching is automatically enabled by default. To work around this problem, disable fast switching on IPSec interfaces.

• CSCdr70941

  After successfully getting certificates and enrolled in a CA server, in config mode the command no crypto ca certificate chain entrust generates the message "WARNING! Illegal read access".

• CSCdr90307

  If you specify the command no ip route-cache for an ATM interface that IPSec is using on both ends of an IPSec tunnel and have a Pagent traffic generator to generate traffic through IPSec tunnel, the following error is generated with traceback messages:

SYS-2-MALLOCFAIL : memory allocation of 1684 bytes 
failed from 0x800AE838: pool I/O, alignment: 4. 
 

  The workaround is to specify the command ip route-cache in the router configuration for the IPSec interface that has a configured encryption map.

• CSCdr97176

  The Cisco 800 series router CSM stops dialing to the network if the fist digit is an asterisk (*). This prevents users (in Finland) from using CO features.

• CSCdr98616

  Cisco 800 series routers do not reject a second incoming voice call when incoming voice priority is set to conditional, and the second data call is not bumped when isdn voice-priority local-directory-number out always is set on both of the POTS ports.

Related Documentation

The following sections describe the documentation available for the 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, which are available online on CCO 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 12.1. They are located on CCO and the Documentation CD-ROM:

• Release Notes for Cisco IOS Release 12.1  

  • To reach the Cross-Platform Release Notes for Cisco IOS Release 12.1 from CCO, click on this path (under the heading Service & Support):

  Technical Documents: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 12.1: Release Notes: Cross-Platform Release Notes
  

  • To reach the Cross-Platform Release Notes for Cisco IOS Release 12.1 on the Documentation CD-ROM, click on this path:

  Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 12.1: Release Notes: Cross-Platform Release Notes
  

• Product bulletins, field notices, and other release-specific documents

  To reach these documents from CCO, click on this path (under the heading Service & Support):

  Technical Documents: Product Bulletins

• Caveats for Cisco IOS Release 12.1 and 12.1 T 

  The Caveats for Cisco IOS Release 12.1  and Caveats for Cisco IOS Release 12.1 T   documents contain caveats applicable to all platforms for all maintenance releases of Release 12.1.

• To reach the caveats document from CCO, click on this path (under the heading Service & Support):

Technical Documents: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 12.1: Caveats

• To reach the caveats document on the Documentation CD-ROM, click on this path:

Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 12.1: Caveats

Note   If you have an account with CCO, you can use Bug Navigator II to find caveats of any severity for any release. You can reach Bug Navigator II on CCO at Software Center: Cisco IOS Software: BUG TOOLKIT: Cisco Bug Navigator II, or at http://www.cisco.com/support/bugtools/bugtool.shtml.

Platform-Specific Documents

These documents are available for the Cisco 800 Series Routers on CCO and the Documentation CD-ROM:

Cisco 801-804 Routers

These documents are available for the Cisco 800 series on CCO and the Documentation CD-ROM:

• Cisco 800 Series Router Quick Start Guide

• Cisco 800 Series Routers Hardware Installation Guide

• Cisco 800 Series Routers Software Configuration Guide

• Release Notes for Cisco 800 Series Routers

• Configuring Cisco IOS Software Features

• Cisco 800 Fast Step Quick Start Guide

• Cisco Fast Step documentation for the 800 series routes

• Regulatory Compliance and Safety Information

• Upgrading Memory in the Cisco 800 Series Routers

On CCO at:

Technical Documents: Documentation Home Page: Access Servers and Access Routers: Fixed Access Routers: Cisco 801-804 Routers

On the Documentation CD-ROM at:

Cisco Product Documentation: Access Servers and Access Routers: Fixed Access Routers: Cisco 801-804 Routers

Cisco 805 Routers

These documents are available for the Cisco 805 router on CCO and the Documentation CD-ROM.

• Cisco 805 Router Hardware Installation Guide

• Quick Start Guide — Setting up the Cisco 805 Router

• Cisco 805 Router Software Configuration Guide

• Regulatory Compliance and Safety Info For the Cisco 805 Router

• Release Notes for the Cisco 805 Router

On CCO at:

  Service & Support: Documentation Home Page: Access Servers and Access Routers: Fixed Access Routers: Cisco 805 Router

On the Documentation CD-ROM at:

  Cisco Product Documentation: Access Servers and Access Routers: Fixed Access Routers: Cisco 805 Router

Cisco 827 Routers

These documents are available for the Cisco 820 series routers on CCO and the Documentation CD-ROM:

• Cisco 827 Routers Hardware Installation Guide

• Quick Start Guide - Setting Up the Cisco 827 Router

• Cisco 827 Routers Software Configuration Guide

• Quick Start Guide - Setting Up the Cisco 827 Routers

• Release Notes for Cisco 827 Routers

On CCO at:

Technical Documents: Documentation Home Page: Access Servers and Access Routers: Fixed Configuration Access Routers: Cisco 827 Routers

On the Documentation CD-ROM at:

Cisco Product Documentation: Access Servers and Access Routers: Fixed Configuration Access Routers: Cisco 827 Routers

Feature Modules

Feature modules describe new features supported by Release 12.1 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 12.1 feature modules:

• From CCO, click on this path (under the heading Service & Support):

  Technical Documents: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 12.1: New Feature Documentation: New Features in 12.1-Based Limited Lifetime Releases: New Features in 12.1X Releases: New Features in 12.1(3)X Releases

• From the Documentation CD-ROM, click on this path:

  Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 12.1: New Feature Documentation: New Features in 12.1-Based Limited Lifetime Releases: New Features in 12.1X Releases: New Features in 12.1(3)X Releases

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 that are shipped with your order in electronic form on the Documentation CD-ROM—unless you specifically ordered printed versions.

Documentation Modules

Each module in the Cisco IOS documentation set consists of two types of books: a configuration guide and a corresponding command reference. Chapters in a configuration guide describe protocols, configuration tasks, 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 CCO and on the Documentation CD-ROM.

On CCO at:

Technical Documents: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 12.1: Configuration Guides and Command References

On the Documentation CD-ROM at:

Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 12.1: Configuration Guides and Command References

Release 12.1 Documentation Set

Table 11 describes the contents of the Cisco IOS Release 12.1 software documentation set, which is available in both electronic and printed form.

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

On CCO at:

Technical Documents: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 12.1

On the Documentation CD-ROM at:

Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 12.1

Table 11: Cisco IOS Software Release 12.1 Documentation Set

Books	Chapter Topics
Cisco IOS Configuration Fundamentals Configuration Guide Cisco IOS Configuration Fundamentals Command Reference	Configuration Fundamentals Overview Using the Command-Line Interface (CLI) Using Configuration Tools Configuring Operating Characteristics Managing Connections, Menus, and System Banners Using the Cisco Web Browser Using the Cisco IOS File System Modifying, Downloading, & Maintaining Configuration Files Loading and Maintaining System Images Maintaining Router Memory Rebooting a Router Configuring Additional File Transfer Functions Monitoring the Router and Network Troubleshooting a Router Performing Basic System Management System Management Using System Controllers Web Scaling Using WCCP Managing Dial Shelves
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	Overview of Apollo Domain, Banyan VINES, DECNET, ISO CLNS, and XNS Configuring Apollo Domain Configuring Banyan VINES Configuring DECnet Configuring IOS CLNS Configuring XNS
Cisco IOS AppleTalk and Novell IPX Configuration Guide Cisco AppleTalk and Novell IPX Command Reference	AppleTalk and Novel IPX Overview Configuring AppleTalk Configuring Novell IPX
Cisco IOS Bridging and IBM Networking Configuration Guide Cisco IOS Bridging and IBM Networking Command Reference, Volume I Cisco Bridging and IBM Networking Command Reference, Volume II	Overview of SNA Internetworking Overview of Bridging Configuring Transparent Bridging Configuring Source-Route Bridging Configuring Token Ring Inter-Switch Link Configuring Token Ring Route Switch Module Overview of IBM Networking
(Continued) Cisco IOS Bridging and IBM Networking Configuration Guide Cisco IOS Bridging and IBM Networking Command Reference, Volume I Cisco Bridging and IBM Networking Command Reference, Volume II	Configuring Remote Source-Route Bridging Configuring Data-Link Switching Plus+ Configuring Serial Tunnel and Block Serial Tunnel Configuring LLC2 and SDLC Parameters Configuring IBM Network Media Translation Configuring Frame Relay Access Support Configuring NCIA Server Configuring the Airline Product Set Configuring DSPU and SNA Service Point Support Configuring SNA Switching Services Configuring Cisco Transaction Connection Configuring Cisco Mainframe Channel Connection Adapters Configuring CLAW and TCP/IP Offload Support Configuring CMPC and CSNA Configuring CMPC+ Configuring the TN3270 Server
Cisco IOS Dial Services Configuration Guide: Terminal Services Cisco IOS Dial Services Configuration Guide: Network Services Cisco IOS Dial Services Command Reference	Large-Scale Dial Solutions Cost-Control Solutions Virtual Private Networks X.25 on ISDN Solutions Telco Solutions Dial-Related Addressing Services Internetworking Dial Access Scenarios Preparing for Dial Access Modem Configuration and Management ISDN and Signalling Configuration PPP Configuration Dial-on-Demand Routing Configuration Dial-Backup Configuration Terminal Service Configuration
Cisco IOS Interface Configuration Guide Cisco IOS Interface Command Guide	Interface Configuration Overview Configuring LAN Interfaces Configuring Serial Interfaces Configuring Logical Interfaces
Cisco IOS IP and IP Routing Configuration Guide Cisco IOS IP and IP Routing Command Reference	IP Overview Configuring IP Addressing Configuring DHCP Configuring IP Services Configuring Mobile IP Configuring On-Demand Routing Configuring RIP Configuring IGRP Configuring OSPF Configuring IP Enhanced IGRP Configuring Integrated IS-ISConfiguring BGP Configuring Multicast BGP (MBGP) Configuring IP Routing Protocol-Independent Features
(Continued) Cisco IOS IP and IP Routing Configuration Guide Cisco IOS IP and IP Routing Command Reference	Configuring IP Multicast Routing Configuring Multicast Source Discovery Protocol Configuring PGM Router Assist Configuring Unidirectional Link Routing Using IP Multicast Tools
Cisco IOS Multiservice Applications Configuration Guide Cisco IOS Multiservice Applications Command Reference	Multiservice Applications Overview Configuring Voice over IP Configuring Gatekeepers (Multimedia Conference Manager) Configuring Voice over Frame Relay Configuring Voice over ATM Configuring Voice over HDLC Configuring Voice-Related Support Features Configuring PBX Signaling Configuring Store and Forward Fax Configuring Video Support Configuring Head-End Broadband Access Router Features Configuring Subscriber-End Broadband Access Router Features Configuring Synchronized Clocking
Cisco Quality of Service Solutions Configuration Guide Cisco IOS Quality of Service Solutions Command Reference	Quality of Service Overview Classification Overview Configuring Policy-Based Routing Configuring QoS Policy Propagation via Border Gateway Protocol Configuring Committed Access Rate Congestion Management Overview Configured Weighted Fair Queueing Configuring Custom Queueing Configuring Priority Queueing Congestion Avoidance Overview Configuring Weighted Random Early Detection Policing and Shaping Overview Configuring Generic Traffic Shaping Configuring Frame Relay and Frame Relay Traffic Shaping Signalling Overview Configuring RSVP Configuring Subnetwork Bandwidth Manager Configuring RSVP-ATM Quality of Service Internetworking Link Efficiency Mechanisms Overview Configuring Link Fragmentation and Interleaving for Multilink PPP Configuring Compressed Real-Time Protocol IP to ATM CoS Overview Configuring IP to ATM CoS QoS Features for Voice Introduction
Cisco IOS Security Configuration Guide Cisco IOS Security Command Reference	TACACS+ Commands Access Control Lists: Overview and Guidelines Cisco Secure Integrated Software Firewall Overview Configuring Lock-and-Key Security (Dynamic Access Lists) Configuring IP Session Filtering (Reflexive Access Lists) Configuring TCP Intercept (Prevent Denial-of-Service Attacks) Configuring Context-Based Access Control Configuring Cisco Secure Integrated Software Intrusion Detection System Configuring Authentication Proxy Configuring Port to Application Mapping IP Security and Encryption Overview Configuring IPSec Network Security Configuring Certification Authority Interoperability Configuring Internet Key Exchange Security Protocol Configuring Passwords and Privileges Neighbor Router Authentication: Overview and Guidelines Configuring IP Security Options
Cisco IOS Switching Services Configuration Guide Cisco IOS Switching Services Command Reference	Configuring MPLS Configuring IP Multilayer Switching Configuring IP Multicast Multilayer Switching Configuring IPX Multilayer Switching Configuring Multicast Distributed Switching Routing Between VLANs Overview Configuring Routing Between VLANs with ISL Encapsulation Configuring Routing Between VLANs with IEEE 802.10 Encapsulation Configuring Routing Between VLANs with IEEE 802.1Q Encapsulation LAN Emulation Overview Configuring LAN Emulation Configuring Token Ring LANE MPOA Overview Configuring the MPOA Client Configuring the MPOA Server Configuring Token Ring LANE for MPOA
Cisco IOS Wide-Area Networking Configuration Guide Cisco IOS Wide-Area Networking Command Reference	Wide-Area Networking Overview Configuring ATM Frame Relay Frame Relay-ATM Internetworking Configuring SMDS Configuring X.25 and LAPB
Cisco IOS Configuration Guide Master Index Cisco IOS Command Reference Master Index Cisco IOS Command Summary Cisco IOS Debug Command Reference Cisco IOS Dial Services Quick Configuration Guide Cisco IOS New Features Index (CCO and Documentation CD only) Cisco IOS System Error Messages