Table Of Contents
Release Notes for the Cisco 800 Series Routers for Cisco IOS Release 12.1(3)XG
Cisco 827 and Cisco 827-4V Routers
Determining Your Software Release
Upgrading to a New Software Release
New Software Features in Release 12.1(3)XG
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
PPP over Ethernet Support on Cisco 820 Series Routers
New Software Features in Release 12.1(1)
Cisco 800 Series Router Supported MIBs
Cisco 820 Series Router Supported MIBs
Caveat CSCdr91706 and IOS HTTP Vulnerability
Cisco 800 Series Router Clock—CSCdp09409
Cisco 800 Series Router Enhancements
Excessive ISDN Line Activation
Multilink PPP and Interleaving
NAT Support for H.323 Signaling
Phone Mate Answering Machine Model 9200
PPP over Frame Relay Support (RFC-1973)
ROM Monitor set stop-bits Parameter
Resolved Caveats - Release 12.2(3)XG6
Open Caveats—Release 12.1(2)XG4
Open Caveats—Release 12.1(2)XG3
Resolved Caveats—Release 12.1(3)XG2
Open Caveats—Release 12.1(2)XG1
Open Caveats—Release 12.1(3)XG
Cisco IOS Software Documentation Set
Release 12.1 Documentation Set
Obtaining Technical Assistance
Software Configuration Tips on the Cisco Technical Assistance Center Home Page
Release Notes for the Cisco 800 Series Routers for Cisco IOS Release 12.1(3)XG
February 20, 2002
These release notes describe new features and significant software components for the Cisco 800 Series Routers that support Cisco IOS Release 12.1(2)XG6. 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 Cross-Platform Release Notes for Cisco IOS Release 12.1 located on Cisco.com and the Documentation CD-ROM.
For a list of the software caveats that apply to Release 12.1(3)XG6, 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.com and the Documentation CD-ROM.
Contents
These release notes discuss the following topics:
•
Obtaining Technical Assistance
System Requirements
This section describes the system requirements for Release 12.1(3)XG6 and includes the following sections:
•
•
Memory Requirements
This section describes the memory requirements for the Cisco IOS feature sets supported by Cisco IOS Release 12.1(3)XG6 on the Cisco 800 Series Routers.
Hardware Supported
Cisco IOS Release 12.1(3)XG6 supports the following Cisco 800 series routers:
•
•
•
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:
•
•
•
Note
•
•
•
•
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
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
The Cisco 805 router provides the following key features:
•
•
•
•
•
•
Cisco 827 and Cisco 827-4V Routers
The Cisco 827 and Cisco 827-4V Series Routers provide the following key hardware features:
•
•
•
•
•
•
•
•
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 versionCisco Internetwork Operating System SoftwareIOS (tm) 800 Software (c800-y6-mw), Version 12.1(3)XG6, RELEASE SOFTWAREAdditional 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 Cisco.com has a variety of information, including upgrade information, organized by release. If you have a Cisco.com account and log in, you can go directly to: http://www.cisco.com/kobayashi/sw-center/sw-ios.shtml.
If you have a Cisco.com 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)XG6 supports the same feature sets as Releases 12.1 and 12.1 T, but Release 12.1(3)XG6 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 5 and Table 6 list the features and feature sets supported by the Cisco 801-804 routers in Cisco IOS Release 12.1(3)XG6. Table 7 lists the features and feature sets supported by the Cisco 805 routers in Cisco IOS Release 12.1(3)XG6. 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)XG6.
Each table uses the following conventions:
•
•
•
Note
Table 5 Feature List by Feature Set for the Cisco 801-804 Routers
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
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
No
No
No
No
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
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
Common Application Programming Interface (CAPI)
(2)
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
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
OSPF Flooding Reduction
(2)
No
No
No
No
No
No
No
No
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
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
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
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
–
No
No
Yes
Yes
No
Yes
Yes
Yes
–
No
No
Yes
Yes
No
Yes
Yes
Yes
–
No
No
Yes
Yes
No
Yes
Yes
Yes
–
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
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
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
1 Advanced Telephone Features are available on the Cisco 803 and 804 routers only. These features require supplementary services from a telephone company.
2 Prefix Dialing is supported on Cisco 803 and Cisco 804 routers only.
Table 7 Feature List by Feature Set for the Cisco 805 Router
PAT (NAT Overload)
Yes
Yes
Yes
No
Yes
No
No
No
NAT
Yes
Yes
Yes
No
Yes
No
No
No
NAT with H.323
No
No
No
No
No
No
No
No
GRE Tunneling
No
Yes
No
No
Yes
No
No
No
NAT
Yes
Yes
Yes
No
Yes
No
No
No
PAP, CHAP, MSCHAP, Local Password
Yes
Yes
Yes
No
Yes
No
No
No
Cisco ConfigMaker
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Cisco FastStep
Yes
Yes
Yes
No
Yes1
No
No
No
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
Yes
Yes
IP
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
IPX
No
No
No
No
Yes
No
No
No
NetBIOS Access Lists
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Transparent Bridging
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Cisco View
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Service Assurance Agent
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
Yes
Yes
Yes
Yes
Syslog
No
Yes
No
Yes
Yes
Yes
Yes
Yes
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
(3)XG
No
Yes
No
Yes
Yes
Yes
Yes
Yes
AAA Radius
No
No
No
No
No
No
No
No
AAA TACACS+
No
Yes
No
Yes
Yes
Yes
Yes
Yes
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
No
Yes
Yes
Yes
IOS Firewall Phase I
–
No
No
Yes
Yes
No
Yes
Yes
Yes
–
No
No
Yes
Yes
No
Yes
Yes
Yes
–
No
No
Yes
Yes
No
Yes
Yes
Yes
–
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
Yes
Yes
Yes
Yes
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
Frame Relay Encapsulation (for ISDN LL)
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Frame Relay Inverse ARP
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
ML-PPP, PPP Compression
Yes
Yes
Yes
No
Yes
No
No
No
PPP over Frame Relay (RFC 1973)
No
No
No
No
No
No
No
No
Bandwidth on Demand (BOD)
No
No
No
No
No
No
No
No
Dial on Demand (DDR)
No
No
No
No
No
No
No
No
HSRP
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
IPX and SPX Spoofing
No
No
No
No
Yes
Yes
No
Yes
Snapshot Routing
No
No
No
No
No
No
No
No
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
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
1 The X.25 configuration feature requires the use of the Cisco command line interface (CLI).
New and Changed Information
The following sections list the new hardware and software features supported by the Cisco 800 series for Release 12.1(3)XG6 and above:
New Software Features in Release 12.1(3)XG
The following sections list the new software features supported by the 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 terminalrouter(config)# pots prefix number 12345Configuring 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 terminalrouter(config)# pots prefix filter 192router(config)# pots prefix filter 1router(config)# pots prefix filter 9router(config)# pots prefix filter 0800router(config)# pots prefix filter 08456Supplementary 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:
•
•
•
•
Note
Requirements for Supplementary Telephone Services Support
You must subscribe to the following Euro-ISDN switch services for these supplementary telephone services to work:
•
•
•
•
•
•
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 statusPOTS Global Configuration:Country:DenmarkDialing Method:Overlap, Tone Source:Local, CallerId Support:YES----------------------Out Going Hunt:Disabled
Note
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:
•
•
•
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
To enable and configure this feature, follow these steps:
Step 1
Step 2
•
•
Configuring the Call Forwarding Method
You can select the method by which the call forwarding feature is controlled as follows:
•
•
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
The following example configures the call forwarding feature to give control to the router:
router# configure terminalrouter(config)# pots forwarding-method functionalConfiguring the Call Forwarding Service
Table 9 shows the DTMF keypad command sequence that you enter to configure the call forwarding service.
When you enable or disable the call-forwarding service, it is enabled or disabled for four basic services (speech, audio at 3.1 kilohertz, telephony at 3.1 kilohertz, and telephony at 7 kilohertz). You should hear a dial tone after you enter the DTMF command if the call-forwarding service is successfully enabled or disabled for at least one of the four basic services. If you hear a busy tone, the command is invalid or the switch does not support any of the four basic services.
Displaying POTS Status
Use the show pots status command to display details of the call forwarding type. This status is not stored across reboots. The following is an example of the screen output:
router# show pots statusPOTS Global Configuration:Country:DenmarkDialing Method:Overlap, Tone Source:Local, CallerId Support:YESOut Going Hunt:DisabledForwarding Method:functional method-------------------------------------Call Forwarding status:The Forwarding Method Enabled is CFUThe forwarded to Address is :33236877The served user Number(s) are :33795742The Forwarding Method Enabled is CFBThe forwarded to Address is :33236877The served user Number(s) are :ALL -> Will work for all numbers allocated to the terminal.Configuring CLIR
Configure CLIR by following these steps:
Step 1
Step 2
Step 3
Step 4
Note
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. Multiple PCs on the LAN are 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 Cisco 800 series router. 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:
Step 1
a.
b.
c.
d.
Step 2
a.
b.
c.
d.
Step 3
a.
b.
c.
d.
Step 4
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 enablevpdn-group 1request-dialinprotocol pppoeint atm0pvc 1/100pppoe-client dial-pool-number 1int dialer 1ip address negotiatedppp authentication chapdialer pool 1dialer-group 1Cisco 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:
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The Cisco IOS Firewall Feature Set feature module provides several sample firewall configurations, including the following examples for small-office environments:
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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:
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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:
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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:
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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 Cisco.com:
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 Cisco.com, 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.
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:
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Important Notes
The following sections contain important notes about Cisco IOS Release 12.1(3)XG6 that can apply to the Cisco 800 Series Routers. (Also, see the "Caveats" section.)
Caveat CSCdr91706 and IOS HTTP Vulnerability
A defect in multiple releases of Cisco IOS software causes a Cisco router or switch to halt and reload if the IOS HTTP service is enabled and you browse to http://router-ip/anytext?/ and enter the enable password when it is requested. This defect can be exploited to produce a denial of service (DoS) attack. This vulnerability can only be exploited if the enable password is known or not set.
The vulnerability, identified as Cisco bug ID CSCdr91706, affects virtually all mainstream Cisco routers and switches running Cisco IOS software releases 12.0 through 12.1, inclusive. This is not the same defect as CSCdr36952.
The vulnerability has been corrected and Cisco is making fixed releases available for free to replace all affected IOS releases. Cisco urges all customers to upgrade to releases that are not vulnerable to this defect as listed in the complete advisory, which is available at: http://www.cisco.com/warp/public/707/ ioshttpserverquery-pub.shtml. You are strongly encouraged to read the complete advisory.
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.
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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:
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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 Cisco.com. 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:
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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)XG6. 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 Cisco.com and the Documentation CD-ROM.
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Resolved Caveats - Release 12.2(3)XG6
This section describes unexpected behavior that is fixed in Release 12.2(3)XG6.
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
Open Caveats—Release 12.1(2)XG4
This section describes possibly unexpected behavior by Release 12.1(2)XG4.
Miscellaneous
CSCds04747
Connection setup improvements.
CSCds32217
D-write community string readable with read-only community, Cisco IOS.
Open Caveats—Release 12.1(2)XG3
This section describes possibly unexpected behavior by Release 12.1(2)XG3.
Miscellaneous
CSCds82106
There is a problem with the twister DSP chip that can cause the router to hang after power up. The Cisco 820 engineering team has implemented a software work around suggested by TI support engineers, which is for the host processor to determine the state of the Host Interrupt bit inside the DSP, before attempting to clear it. This software change will prevent the router from hanging.
Resolved Caveats—Release 12.1(3)XG2
This section describes possibly unexpected behavior by software releases prior to Release 12.1(3)XG2 that have been resolved in Release 12.1(3)XG2 and above.
Miscellaneous
CSCds05811
If secondary IP addresses are configured on either an Ethernet or FastEthernet interface and the running-config is saved to NVRAM, when the router is reloaded the secondary IP addresses disappear from the configuration. This caveat is identical to the caveats: CSCdr51651, CSCdr72866, CSCdr72868, and CSCdr77724, as well as cases A445655, A519050, and A466616. The problem was originally found in Release 12.1(2)T. This caveat is fixed in Cisco IOS Release 12.1(3)XG2.
Open Caveats—Release 12.1(2)XG1
This section describes possibly unexpected behavior by Release 12.1(2)XG1.
Miscellaneous
CSCds27736
On Cisco 801 through 804 routers with rev-B MPC850 CPUs, the output of the command show version displays the CPU type as "MPC860" instead of "MPC850" and the CPU is not correctly configured. Incorrect configuration results in various malfunctions both soon after power-up and after prolonged operation. Potential failures can include (but are not limited to): a router halt, intermittent WAN failures, the corruption of DRAM, and protection violations. To work around this problem, upgrade to Cisco IOS release 12.1(3)XG1 or later. Note that these routers cannot be downgraded to previous Cisco IOS releases.
CSCds37736
Cisco 801 through 804 router initialization ignores the CPU type and always loads the micro code for the MPC850.
CSCds52865
Although the old Alcatel microcode 2.58 was compatible with the ADI-based Cisco line card, Alcatel microcode 3.6.66 is not compatible with the Cisco 4xDMT ADI based line card. To work around this problem for Cisco 827 routers, upgrade to Cisco IOS release 12.1(3)XG1. To work around this problem for SOHO 70 series routers, upgrade to Cisco IOS release 12.1(3)XP1. Note that Cisco IOS releases 12.1(3)XG1 and 12.1(3)XP1 contain both 2.58 and 3.6.66 microcode versions, but only use 2.58 microcode for ADSL over ISDN. After upgrading your software, configure the command dsl operating-mode ansi-dmt for the ATM0 interface, which allows the router to function with the DMT card of the Cisco DSLAM.
Open Caveats—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 bytesfailed 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 Cisco.com and the Documentation CD-ROM.
Use these release notes with the documents listed in the following sections:
Release-Specific Documents
The following documents are specific to Release 12.1. They are located on Cisco.com and the Documentation CD-ROM:
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Technical Documents: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 12.1: Release Notes: Cross-Platform Release Notes
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Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 12.1: Release Notes: Cross-Platform Release Notes
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To reach these documents from Cisco.com, click on this path (under the heading Service & Support):
Technical Documents: Product Bulletins
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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.
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Technical Documents: Documentation Home Page: Cisco IOS Software Configuration: Cisco IOS Release 12.1: Caveats
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Cisco Product Documentation: Cisco IOS Software Configuration: Cisco IOS Release 12.1: Caveats
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Platform-Specific Documents
These documents are available for the Cisco 800 Series Routers on Cisco.com and the Documentation CD-ROM:
Cisco 801-804 Routers
These documents are available for the Cisco 800 series on Cisco.com and the Documentation CD-ROM:
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On Cisco.com 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 Cisco.com and the Documentation CD-ROM.
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On Cisco.com 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 Cisco.com and the Documentation CD-ROM:
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On Cisco.com 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:
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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
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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
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 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 Cisco.com and on the Documentation CD-ROM.
On Cisco.com 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.
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On Cisco.com 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
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Obtaining Documentation
World Wide Web
You can access the most current Cisco documentation on the World Wide Web at http://www.cisco.com, http://www-china.cisco.com, or http://www-europe.cisco.com.
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. Therefore, it is probably more current than printed documentation. The CD-ROM package is available as a single unit or as an annual subscription.
Ordering Documentation
Registered Cisco.com users can order the Documentation CD-ROM and other Cisco Product documentation through our online Subscription Services at http://www.cisco.com/cgi-bin/subcat/kaojump.cgi.
Nonregistered Cisco.com users can order documentation through a local account representative by calling Cisco's corporate headquarters (California, USA) at 408 526-4000 or, in North America, call 800 553-NETS (6387).
Obtaining Technical Assistance
Cisco provides Cisco.com as a starting point for all technical assistance. Warranty or maintenance contract customers can use the Technical Assistance Center. All customers can submit technical feedback on Cisco documentation using the web, e-mail, a self-addressed stamped response card included in many printed documents, or by sending mail to Cisco.
Cisco.com
Cisco continues to revolutionize how business is done on the Internet. 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's broad range of features and services helps customers and partners to streamline business processes and improve productivity. Through Cisco.com, you will find information about Cisco and our networking solutions, services, and programs. In addition, you can resolve technical issues with online support services, 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 may order products, check on the status of an order and view benefits specific to their relationships with Cisco.
You can access Cisco.com in the following ways:
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You can e-mail questions about using Cisco.com to cco-team@cisco.com.
Technical Assistance Center
The Cisco Technical Assistance Center (TAC) is available to warranty or maintenance contract customers who need technical assistance with a Cisco product that is under warranty or covered by a maintenance contract.
To display the TAC web site that includes links to technical support information and software upgrades and for requesting TAC support, use www.cisco.com/techsupport.
To contact by e-mail, use one of the following:
In North America, TAC can be reached at 800 553-2447 or 408 526-7209. For other telephone numbers and TAC e-mail addresses worldwide, consult the following web site: http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml.
Software Configuration Tips on the Cisco Technical Assistance Center Home Page
If you have a Cisco.com log-in account, you can access the following URL, which contains links and tips on configuring your Cisco products:
http://www.cisco.com/public/technotes/tech_sw.html
This URL is subject to change without notice. If it changes, point your Web browser to Cisco.com, press Login, and click on this path: Technical Assistance Center: Technical Tips.
The following sections are provided from the Technical Tips page:
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Documentation Feedback
If you are reading Cisco product 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.
To submit your comments by mail, for your convenience many documents contain a response card behind the front cover. Otherwise, you can mail your comments to the following address:
Cisco Systems, Inc.
Document Resource Connection
170 West Tasman Drive
San Jose, CA 95134-9883We appreciate and value your comments.
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