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TAC Certified
Vol. 2, No. 3, March, 2000 Unmatched Online Technical Support www.cisco.com/tac
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Technologies
Hardware Products
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Cisco IOS® Software)
Cisco IOS Software

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What's Hot
Cisco Output Interpreter Now Diagnoses IP Routing Protocol "Show" Commands!
 

Recent enhancements to the Cisco Output Interpreter tool now allow you to diagnose IP Routing protocol "show" commands on line at your convenience. The Cisco Output Interpreter tool, which also supports select access and ATM show commands, helps you identify, troubleshoot, and resolve router issues quickly and easily. Cisco TAC engineers continually update the information that tells the tool how to interpret commands so that you will receive the accurate analyses you need. Check out the enhanced Cisco Output Interpreter tool at:

http://www.cisco.com/support/OutputInterpreter
(available to registered users only)

Cisco TAC Web Tools Showcase Provides Valuable Information about Online Support Resources
 

The Cisco TAC Web Tools Showcase provides you training on how to use the new features of the Cisco TAC Web site, such as the Product and Technology Pages, Cisco TAC Guide, Cisco Output Interpreter tool, online training videos and more. By attending the TAC Web Tools Showcase, you will be able to take advantage of the TAC Web site resources by understanding how to find critical information, troubleshoot issues, enhance your skills, and support your networks. Response to the initial Cisco TAC Web Tools Showcase events, held in Boston on January 27 and in Los Angeles on February 1, has been overwhelmingly positive. Ninety-nine percent of Showcase attendees said that the event was an excellent use of their time and that the information they received would help them do their jobs more effectively. The Cisco TAC Web Tools Showcase will begin a nationwide tour beginning March 28 in San Jose, California. April locations include San Francisco, Dallas, Houston, and New York City. For specific dates and locations, visit:

http://www.cisco.com/tac/showcase

TAC Newsletter Customization Coming Soon! Sign Up Now!
 

Soon you'll be able to customize the Cisco TAC Newsletter. Within the next few months, the Cisco TAC Newsletter will implement a program that will allow you to receive information tailored to your specific technology interests. Understanding your individual requirements helps us provide you with the specific information that you need to support your network. Please take a moment to update your Newsletter profile via the appropriate url below to reflect the technologies that are of interest to you:

http://www.cisco.com/public/news_training/itsnews/subscribe.shtml
(available to guest users)

http://www.cisco.com/kobayashi/news_training/itsnews/subscribe.shtml
(available to registered users)

Cisco TAC Launches Software Search Tool!
 

Cisco is pleased to announce the launch of the TAC Software Search tool. This tool was developed to allow you to view or download image metadata for all images that reside on the Cisco FTP server. This application replaces image metadata that was previously found in readme.txt files. You can also automate downloads of the metadata by using a simple perl script; a sample script can be accessed by clicking on the tool's "Help" button. Test drive the TAC Software Search tool today:

http://www.cisco.com/cgi-bin/Software/SWSearch/SWSearch.cgi
(available to registered users only).

Back to top
Tool Spotlight
Cisco TAC Hardware-Software Compatibility Tool Helps Determine Hardware/Software Compatibility Quickly and Easily!
 

The TAC Hardware-Software Compatibility tool presents you with an opportunity to select Cisco product in the form of a product family (such as the Cisco 2500) or a product number (for example Cisco2514). Upon selecting the product family or product number, the TAC Hardware-Software Compatibility tool will return the "minimum supported Cisco IOS software version(s)" for the specified product. You can also choose to select a product family and specific software version to ascertain the "minimum supported software version(s)." The TAC Hardware-Software Compatibility tool can help you easily determine IOS software version(s) supported for a specified product within a product family. Learn more about the TAC Hardware-Software Compatibility tool at:

http://www.cisco.com/cgi-bin/front.x/Support/HWSWmatrix/hwswmatrix.cgi
(available to registered users)

TAC Quick Reference Links
  TAC Guide
Product Pages
Technology Pages
Tools
Documents
Software Center
Cisco Live
(available to registered users)
Back to top
Technologies
ROUTING
 

Tech Tip:
Scalable ISDN Backup Strategy for Large OSPF Networks

This Tech Tip describes a scalable ISDN backup strategy for large OSPF networks.

http://www.cisco.com/warp/customer/104/23.html
(available to registered users)

 

Tech Tip:
Multicast Quick-Start Configuration Guide

IP multicasting is a bandwidth-conserving technology that reduces traffic by simultaneously delivering a single stream of information to thousands of corporate recipients and homes. Applications that take advantage of multicast include videoconferencing, corporate communications, distance learning, and distribution of software, stock quotes, and news. This document discusses the basics of configuring multicast for various networking scenarios.

http://www.cisco.com/warp/customer/105/48.html
(available to registered users)

 

Tech Tip:
Multicast Source Discovery Protocol SA Filter Recommendations

This Tech Tip describes how to configure a standard set of filtering rules for MSDP Source-Active (SA) messages. We highly recommend you establish at least these filters when connecting to the native IP multicast Internet.

http://www.cisco.com/warp/customer/105/49.html
(available to registered users)

 

Tech Tip:
ISDN DDR Using HDLC Encapsulation

This sample configuration is an example of ISDN dial-on-demand routing (DDR) using High-Level Data Link Control (HDLC) encapsulation. This example uses both B-channels of a single basic rate interface (BRI).

http://www.cisco.com/warp/customer/793/access_dial/bri_ddr_hdlcencap.html
(available to registered users)

 

Tech Tip:
ISDN NFAS Primary and Backup D Channel

This example configures ISDN Primary Rate Interface (PRI) and Non-Facility Associated Signaling (NFAS) on three T1 controllers of a Cisco 7500 series router.

http://www.cisco.com/warp/public/793/access_dial/isdn_nfas_backup.html
(available to registered users)

 

Tech Tip:
How Does Multicast NAT Work on Cisco Routers?

When you configure Network Address Translation (NAT) on a Cisco IOS router, multicast sources and receivers, or Protocol Independent Multicast (PIM) entities, such as rendezvous points (RPs) or RP mapping agents, work on either side of the NAT router without additional configuration commands.

http://www.cisco.com/warp/customer/105/multicast_nat.html
(available to registered users)

 

Tech Tip:
What Does the EIGRP DUAL-3-SIA Error Message Mean?

The DUAL-3-SIA error message indicates that an Enhanced Interior Gateway Routing Protocol (EIGRP) route is in the "stuck in active" (SIA) state. This Tech Tip considers common causes and solutions.

http://www.cisco.com/warp/customer/103/18.html
(available to registered users)

 

Tech Tip:
How Does OSPF Generate Default Routes?

The way that OSPF generates default routes (0.0.0.0) varies depending on the type of area into which the default route is being injected. This document covers normal areas, stub/totally stub areas, and not-so-stubby areas (NSSA).

http://www.cisco.com/warp/customer/104/21.html
(available to registered users)

 

Sample Configuration:
Dial Backup Using Dialer Watch over ISDN

Dialer Watch is a backup feature that integrates dial backup with routing capabilities. Dialer Watch provides reliable connectivity without relying solely on defining interesting traffic to trigger outgoing calls at the central router. Dialer Watch uses the convergence times and characteristics of dynamic routing protocols. Integrating backup and routing features enables Dialer Watch to monitor every deleted route. By configuring a set of watched routes that define the primary interface, you are able to monitor and track the status of the primary interface as watched routes are added and deleted.

http://www.cisco.com/warp/customer/793/access_dial/backupwatch.html
(available to registered users)

 

Sample Configuration:
Bridging across ISDN

Two different IP networks are integrated without using routing. Bridging is the option chosen for this sample configuration.

http://www.cisco.com/warp/customer/793/access_dial/isdnbridge.html
(available to registered users)

NETWORKING
 

Tech Tip:
Installing a Cisco ICM PG to Interface with a Lucent G3 Call Center

This Tech Tip explains how to install a Cisco ICM peripheral gateway (PG) to interface with a Lucent G3 Call Center.

http://www.cisco.com/warp/customer/78/installPG.html
(available to registered users)

 

Tech Tip:
Real-Time Events Have Stopped

The real-time feed is a one-way conduit for providing real-time data and statistics to an administrative workstation (AW). When running ICM user applications such as Monitor ICR and Script Editor on an AW, a message similar to "real time events have stopped" appears. This Tech Note explains the common causes of these error messages.

http://www.cisco.com/warp/customer/78/realtimestop.html
(available to registered users)

 

Sample Configuration:
Configuring NAT on Cable Modem

This document shows you how to configure NAT on a cable modem.

http://www.cisco.com/warp/customer/133/config_nat_on_cm.html
(available to registered users)

 

Sample Configuration:
DLSw Ethernet Redundancy Sample Configuration

This sample configuration implements the Cisco IOS Ethernet redundancy feature on a data-link switching (DLSw) network. It also includes debugging techniques of this feature.

http://www.cisco.com/warp/customer/697/8.html
(available to registered users)

SECURITY
 

Field Notice Security Advisory:

This Security Advisory talks about Distributed Denial of Service (DDoS). More specifically, it will help you: * Recognize programs used to facilitate DDoS attacks * Apply measures to prevent the attacks * Gather forensic information if you suspect an attack * Learn more about host security

http://www.cisco.com/warp/public/707/newsflash.html
(available to guest AND registered users)

 

Tech Tip:
Configuring CSU for UNIX (Solaris)

This document describes how to configure CiscoSecure ACS for UNIX (CSU).

http://www.cisco.com/warp/public/480/14.html
(available to registered users)

 

Tech Tip:
Basic CBAC Configuration

This sample configuration demonstrates how to use Context-based Access Control (CBAC) to inspect what is happening behind a firewall.

http://www.cisco.com/warp/customer/110/32.html
(available to registered users)

 

Tech Tip:
CHAP or ARAP with TACACS+: Interoperability Problems with One-Time Password Systems

This document discusses the conflict between the crypto challenge authentication technology that Challenge Handshake Authentication Protocol (CHAP) and AppleTalk Remote Access Protocol (ARAP) use and the one-time token technology that Security Dynamics and other firms use.

http://www.cisco.com/warp/customer/707/security-tacacs-papchap.html
(available to registered users)

 

Tech Tip:
Timeout Commands: tacacs-server login-timeout and timeout login response

These commands control the timeout for the login sequence prompts (username, password). For clients that dial in via async and run a script that provides the username and password provided by the Cisco router, the 30-second default may have to be extended.

http://www.cisco.com/warp/customer/707/tacacs_login.html
(available to registered users)

 

Sample Configuration:
IPSec between Three Routers Using Private Addresses

This example illustrates a fully meshed configuration with three routers using private addresses.

http://www.cisco.com/warp/customer/707/30.html
(available to guest and registered users)

 

Sample Configuration:
PIX Firewall to VPN Client Configuration Using the sysopt ipsec pl-compatible command

This configuration demonstrates how to connect a virtual private network (VPN) client to a PIX™firewall using wild cards and the sysopt ipsec pl-compatible command. This command enables IP security (IPSec) packets to bypass the PIX Firewall's NAT and Adaptive Security Algorithm (ASA) features and allows incoming IPSec packets to terminate on the inside interface.

http://www.cisco.com/warp/customer/707/29.html
(available to guest and registered users)

VOICE APPLICATIONS
 

Tech Tip:
Understanding Dial Peer and Dial Plan Structures

This document explains the functionality of dial peers and dial plans. All Cisco voice products use dial peer and dial plan structures and capabilities, but not always in identical ways.

http://www.cisco.com/warp/customer/788/dial_peers.html
(available to registered users)

 

Sample Configuration:
Configuring Voice on a Cable Modem with Gatekeeper

A gatekeeper is an H.323 entity. Its primary role is to provide address translation and control access for H.323 terminals and gateways. Gatekeepers can provide other services to H.323 terminals and gateways, such as bandwidth management and locating gateways. Gatekeepers maintain a registry of devices in the multimedia network. These devices register with the gatekeeper at startup and request admission to a call from the gatekeeper. Through this gatekeepers maintain a current topology of a zone.

http://www.cisco.com/warp/customer/788/config_voice_on_cm_w_gate.html
(available to registered users)

 

Sample Configuration:
Cable Modem Voice Configuration

This is a sample configuration for running Voice over IP (VoIP) "end to end" from one cable modem to another, never connecting to a real telephone switch or "local exchange carrier." VoIP is the ability to carry normal telephony-style voice over an IP-based internet with basic telephone service functionality, reliability, and voice quality. Cisco currently produces two cable modem routers, the Cisco uBR904 and the uBR924 universal broadband routers. Only the Cisco uBR924 supports voice.

http://www.cisco.com/warp/customer/788/cm_voice_config.html
(available to registered users)

 

Sample Configuration:
VoIP Toll Bypass Application for International Bank

This is a case study with sample configurations from a large New York-based banking institution. This bank has been utilizing Cisco 2600 VoIP technology to support their small to medium-sized branches in South America. The sample configurations in this case study deal with both Cisco IOS Release 11.2 and Cisco IOS Release 12.0(5)T and later.

http://www.cisco.com/warp/customer/788/case_study.html
(available to registered users)

Back to top
Hardware Products
HARDWARE IN GENERAL
 

Tech Tip:
What Are "Overruns" on a Serial Interface?

This document describes why overruns appear in the output of the show interface Serial 0 command.

http://www.cisco.com/warp/customer/471/serial_overruns.html
(available to registered users)

 

Tech Tip:
Using Service tcp-keepalives to Clear Hung Telnet Sessions

This document shows how to turn on Transmission Control Protocol (TCP) keepalives so that one router will notice when the connection to the other router goes away.

http://www.cisco.com/warp/customer/471/tcpkeepalive.html
(available to registered users)

 

Sample Configuration:
DNIS and Modem Pooling Using a CAS T1 Line

This document describes how to configure Digital Number Identification Service (DNIS) support for a channelized T1 line to enable modem pooling. Two sample configurations are included.

http://www.cisco.com/warp/customer/793/access_dial/cas_dnis_mpooling.html
(available to registered users)

 

Sample Configuration:
Router Mode Configuration

This example illustrates a router mode configuration. In this configuration an off-site user can enter the network and have a known internal IP address assigned, which allows the user to be authenticated and authorized.

http://www.cisco.com/warp/customer/707/25.html
(available to registered users)

 

Sample Configuration:
FRAS DLSw Backup

In this sample configuration, a Cisco router configured for Frame Relay access support (FRAS) boundary network node (BNN) with Token Ring-attached devices is communicating with a Frame Relay-attached front-end processor (FEP).

http://www.cisco.com/warp/customer/100/FRAS-DLSW.html
(available to registered users)

 

Sample Configuration:
FRAS BAN Router with Ethernet-Connected Devices Sample

In this sample configuration, a Cisco router configured for FRAS border access node is connected to Ethernet end devices that are communicating with a FRAS Host configured router.

http://www.cisco.com/warp/customer/100/bans-ethernet.html
(available to registered users)

 

Sample Configuration:
FRAS BAN Router with Token Ring-Connected Devices Sample

In this sample configuration, a Cisco router configured for FRAS boundary access node is connected to Token Ring end devices that are communicating with a FRAS Host configured router.

http://www.cisco.com/warp/customer/100/bans-token.html
(available to registered users)

 

CISCO AS5200
Sample Configuration:
Cisco AS5200 CHAP/PAP Call-in

This is a tested configuration of a remote Cisco router dialing and connecting to a Cisco AS5200. The remote router will not be challenging the Cisco AS5200 for CHAP/PAP authentication. Authentication is started by the Cisco AS5200. This configuration is useful where authentication is to be done only by the called router and not by both the called and calling routers.

http://www.cisco.com/warp/customer/793/access_dial/pap_chap.html
(available to registered users)

 

CISCO 1470
Sample Configuration:
Cisco 1417 ADSL Bridge with NAT

This sample configuration illustrates an asymmetric digital subscriber line (ADSL)-bridge configuration with NAT.

http://www.cisco.com/warp/customer/471/adsl_with_nat.html
(available to registered users)

 

CISCO 6100
Field Notice:
Fan Unit Mechanical Stability Problem on Cisco 6100 Series DSLAM

During the shipment of the fan tray module, the screws that secure the fan inside the fan unit may become loose or fall out.

http://www.cisco.com/warp/customer/770/fn10211.html
(available to registered users)

 

Field Notice:
Cisco 6100 Series DSLAM Can Experience Transient Errors on DS3

A defect in the 6100-ST-2-IO-DS3= can cause transient DS3 errors to occur.

http://www.cisco.com/warp/customer/770/fn7811.html
(available to registered users)

 

CISCO 6400
FAQ:
Node Line Card Frequently Asked Questions

This page lists FAQs for Node Line Cards.

http://www.cisco.com/warp/customer/471/nlcfaq.html
(available to registered users)

 

FAQ:
Node Switch Processor Frequently Asked Questions

This page lists FAQs for Node Switch Processors.

http://www.cisco.com/warp/customer/471/nspfaq.html
(available to registered users)

 

CATALYST 5000
Sample Configuration:
Configuring STP on Catalyst 5000 Switches

Describes how to configure Spanning-Tree Protocol (STP) on Catalyst 5000 switches.

http://www.cisco.com/warp/customer/473/5.html
(available to registered users)

 

CATALYST 8540
Field Notice:
Catalyst 8540 RP CPU Peripheral Interface Resets and RP Hangs on an Attempt to Reprogram ROMMON

The ROMMON images on the Catalyst 8540 route processors (RPs) are designed to be upgraded using the reprogram command. In roughly 10 percent of the attempts to reprogram the ROMMON images on the RP, the system hangs after displaying the following message: "Resetting in 3 seconds." This happens on a Catalyst 8540 CSR or MSR RP. In rare circumstances, you can reset the CPU PIF. When this happens, the CPU (RP) no longer sends or receives traffic, although the switch may still pass traffic.

http://www.cisco.com/warp/customer/770/fn11031_02162000.shtml
(available to registered users)

 

Cisco SC2200
Field Notice:
Use of Static Host Routes to Implement Cisco SC2200 Link Failover

This field notice applies to sites implementing Redundant Signaling Link functionality on a Cisco SC2200 system.

http://www.cisco.com/warp/customer/770/fn9631.html
(available to registered users)

 

CISCO CABLE MODEM
Tech Tip:
DHCP and the DOCSIS Configuration File for Cable Modems (DOCSIS 1)

This document discusses how Cisco cable modem cards allow you to connect cable modems on the hybrid fiber coaxial (HFC) network to a Cisco uBR7200 series universal broadband router in a cable television (CATV) headend facility.

http://www.cisco.com/warp/customer/133/dhcp_and_docsis_config_cm.html
(available to registered users)

 

Sample Configuration:
Sample Configuration and Verification for Cable in Routing Mode

This document shows you how to configure the exchange of Routing Information Protocol (RIP) routes between the cable modem terminal server (CMTS) and the cable modem (CM).

http://www.cisco.com/warp/customer/133/cable_in_routing.html
(available to registered users)

 

CISCO uBR904 CABLE MODEM
Sample Configuration:
Bridging Cable Modem Sample Configuration and Verification

This document shows you how to configure bridging over a cable modem.

http://www.cisco.com/warp/customer/133/bridging_cm_sample_config.html
(available to registered users)

 

ACCESS PRODUCTS
Tech Tip:
Floating Static Route to a Null Interface

The null interface is typically used for preventing routing loops. Enhanced Interior Gateway Routing Protocol (EIGRP), for instance, always creates a route to a null interface when it summarizes a group of routes.

http://www.cisco.com/warp/customer/471/route_to_null_interface.html
(available to registered users)

 

Tech Tip:
What Is the Difference between ISDN Point-to-Point and ISDN Multipoint on an AT&T 5ESS Switch?

This document describes the difference between ISDN point-to-point and ISDN multipoint on an AT&T 5ESS switch.

http://www.cisco.com/warp/customer/471/isdn-point-to-multi.html
(available to registered users)

 

Field Notice:
Access Servers Require Redundant Link Manager V1 for RLM Connection to Cisco SC2200 Release 4.2(x)

RLM does not function correctly when used with a Cisco SC2200 running software Release 4.2(x). This happens after upgrading to Cisco IOS Version 12.0(6) or later in network access servers (Cisco AS5200, AS5300, or AS5800) using an RLM connection to the SC2200.

http://www.cisco.com/warp/customer/770/fn10771.html
(available to registered users)

 

Sample Configuration:
DNIS and Modem Pooling with a PRI Line

The sample configurations in this document illustrate how to configure Digital Number Identification Service (DNIS) support for a Primary Rate Interface (PRI) and how to set up modem pooling. Three configurations are provided: * Modem pooling with multiple modems defined in the pool-range * Modem pooling with one modem in the pool-range * Modem pooling without a pool-range

http://www.cisco.com/warp/customer/793/access_dial/pri_dnis_mpool.html
(available to registered users)

 

Sample Configuration:
Multilink via a Virtual-Template on Two Serial Interfaces

This sample configuration illustrates a multilink connection between serial interfaces via the virtual- template configuration.

http://www.cisco.com/warp/customer/793/access_dial/mpp_serial.html
(available to registered users)

 

Sample Configuration:
Configuring X.25 PVCs

This document shows you how to configure X.25 PVCs.

http://www.cisco.com/warp/customer/133/config_x25_pvcs.html
(available to registered users)

 

Sample Configuration:
X.25 over TCP/IP

This document shows you how to configure X.25 over TCP/IP. This allows X.25 packets to be sent over a Transmission Control Protocol/Internet Protocol (TCP/IP) network instead of a Link Access Procedure, Balanced (LAPB) link.

http://www.cisco.com/warp/customer/133/x25_over_tcpip.html
(available to registered users)

 

Sample Configuration:
TCP over X.25

Datagram transport (or encapsulation) is a cooperative effort between two hosts communicating across an X.25 network. You configure datagram transport by establishing a mapping on the encapsulating interface between the far host's protocol address (for example, IP) and its X.121 address. Because the call identifies the protocol that the virtual circuit will carry in the Call User Data field (CUD field), the terminating host can accept the call if it is configured to exchange the identified traffic with the source host.

http://www.cisco.com/warp/customer/133/tcp_over_x25.html
(available to registered users)

 

Sample Configuration:
Dial Backup Using Dialer Watch over ISDN

Dialer Watch is a backup feature that integrates dial backup with routing capabilities. Dialer Watch provides reliable connectivity without relying solely on defining interesting traffic to trigger outgoing calls at the central router. Dialer Watch uses the convergence times and characteristics of dynamic routing protocols. Integrating backup and routing features enables Dialer Watch to monitor every deleted route. By configuring a set of watched routes that define the primary interface, you are able to monitor and track the status of the primary interface as watched routes are added and deleted.

http://www.cisco.com/warp/customer/793/access_dial/backupwatch.html
(available to registered users)

 

Sample Configuration:
Multilink PPP across Two Serial Physical-Layer Async Interfaces

Router 1 has been configured to receive calls only while Router 2 initiates the call and connects to Router 1. Both routers are configured for Multilink Point-to- Point protocol (PPP). When the connection comes up, a master bundle is created and both B-channels are bundled together under a virtual-access interface.

http://www.cisco.com/warp/customer/793/access_dial/multilink_2serial_async.html
(available to registered users)

 

Sample Configuration:
Multilink PPP on Back-to-Back Routers with Multiple Serial Interfaces

These configurations can be used for routers connected via leased lines or routers that have the channel service unit/data service unit (CSU/DSU) or ISDN terminal adapter (TA) configured to dial (Cisco routers have not been configured for dial telephone numbers).

http://www.cisco.com/warp/customer/793/access_dial/pppmultilink.html
(available to registered users)

 

Sample Configuration:
Async Callback with a Windows 95 PC and an Access Server

In async PPP callback configuration, a user dials into an access server and authenticates and then the router disconnects the call. The access server dials the client back based on the phone number that is configured on the access server.

http://www.cisco.com/warp/customer/793/access_dial/win95_async_callback.html
(available to registered users)

 

Sample Configuration:
Bridging with Dialer Profiles

This sample configuration illustrates bridging across ISDN using Dialer Profiles.

http://www.cisco.com/warp/customer/793/access_dial/dprofile_bridge.html
(available to registered users)

 

Sample Configuration:
Suppressing Messages on Async Lines

This configuration demonstrates how to eliminate connection status messages from being sent to the user when a user (or a terminal) connects to TTY lines by doing a reverse telnet to a designated host (or terminal) using the autocommand command.

http://www.cisco.com/warp/customer/793/access_dial/suppress.html
(available to registered users)

 

Sample Configuration:
PPP Half-Bridging

For situations in which a routed network needs connectivity to a remote bridged Ethernet network, a serial or ISDN interface can be configured to function as a PPP half-bridge.

http://www.cisco.com/warp/customer/793/access_dial/ppp_half_bridging.html
(available to registered users)

 

Sample Configuration:
Dial-on-Demand Routing (DDR) with Easy IP

This sample configuration illustrates the use of Cisco IOS Easy IP, which allows a router to negotiate its own IP address and to conduct Network Address Translation (NAT) through the negotiated address.

http://www.cisco.com/warp/customer/793/access_dial/ip_nego.html
(available to registered users)

 

Sample Configuration:
Modem Pooling with DNIS

This configuration is an example of how modem pooling works on an access server.

http://www.cisco.com/warp/customer/793/access_dial/modem_pooling.html
(available to registered users)

 

Sample Configuration:
AppleTalk over ISDN with DDR

In this example, the Cisco 2501 will dial the Cisco AS5200 universal access server based on the AppleTalk static routes and dialer maps that have been configured. This will allow the AppleTalk ping packets to reach the Ethernet node of the Cisco AS5200.

http://www.cisco.com/warp/customer/793/access_dial/appletalk_isdn_ddr.html
(available to registered users)

 

IGX
Field Notice:
UVM with T1 Backcard is Stuck in Yellow Alarm When Using CCS

The universal voice module (UVM) port will return a yellow alarm to the locally connected device, usually a private branch exchange (PBX) or channel bank when the UVM port receives yellow alarm. Likewise, some PBXs detect yellow alarm and return yellow alarm. This combination results in a situation where neither the UVM port nor the PBX port can be cleared from the yellow alarm state without manual intervention by maintenance engineers. If the PBX and IGX configurations are both set to common channel signaling (CCS), this problem may appear when the channels on the PBX interface are manually put out of service, or when one of the channel permanent virtual circuits (PVCs) terminating on the UVM fails.

http://www.cisco.com/warp/customer/770/fn10591.shtml
(available to registered users)

 

IGX 8400
Field Notice:
Possible Cause Identified for Intermittent Bus Errors on IGX 8400

This field notice addresses the problem that may occur when the physical arrangement of modules in an IGX™8400 node causes universal bandwidth unit (UBU) bus errors.

http://www.cisco.com/warp/customer/770/fn10931.shtml
(available to registered users)

 

MC3810
Sample Configuration:
Configuring MC3810 for TDM Cross Connect

This document is an extension of the cross connect and frame-forward signaling for Cisco MC3810 Primary Rate Interface (PRI) document available on CCO at http://www.cisco.com/warp/customer/788/crs_cnct_fr_for.html (available to registered users). This document offers the Cisco MC3810 sample configuration so you can: * Pass information over channels 1-16 as uncompressed voice, allowing the private branch exchange (PBX) to be connected to PSTN * Pass information over channels 17-18 as a 128KB data channel to another device (via interface Serial 0) * Transmit data and compressed voice over channels 19-24

http://www.cisco.com/warp/customer/788/tdm_cross_con.html
(available to registered users)

 

Sample Configuration:
Configuring Voice over ATM on Cisco MC3810

This document will help you configure Cisco MC3810 routers to establish data connectivity and to place FXS to FXS voice calls over Asynchronous Transfer Mode (ATM).

http://www.cisco.com/warp/customer/788/3810_3810_voatm.html
(available to registered users)

 

Sample Configuration:
Cross Connect and Frame Forward Signaling for Cisco MC3810 PRI

This document discusses and offers configuration examples for Primary Rate Interface (PRI) signaling for the Cisco MC3810. More specifically, you will see the following: brief discussion of PRI signaling for Cisco MC3810s, Common Channel Signaling (CCS) cross- connect example with sample configurations, CCS frame- forward example with sample configurations, and verifying proper network operation. This document uses information already presented on the CCS page at http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/120newft/120limit/120xa/120xa1/xaccsfm.htm, but presents the subject with additional examples.

http://www.cisco.com/warp/customer/788/crs_cnct_fr_for.html
(available to registered users)

 

OPTICAL TRANSPORT PRODUCTS
Field Notice:
NPE-175 and NPE-225 Recall Due to Anomalous Packet Handling

This new page lists several Cerent® 454 and Cisco 15454-related field service bulletins.

http://www.cisco.com/warp/customer/770/55.html
(available to registered users)

 

RSP AND RSM PROCESSORS
Field Notice:
IPSec/CEF Software Defect on RSPx and RSM

On all RSP and RSM processors, when an interface in the router is configured with an IPSec crypto map and the switching mode is Cisco Express Forwarding (CEF), the RSP and RSM will restart when it attempts to decrypt IPSec packets.

http://www.cisco.com/warp/customer/770/fn10611.shtml
(available to registered users)

 

WAN SWITCHING
Tech Tip:
AUSM/B IMA Configuration and Troubleshooting Guide

This Tech Tip is intended as a guide to troubleshooting the operation, administration, and maintenance of inverse multiplexing over ATM (IMA) on the MGX™8850 ATM User Service Module Model B (AUSM/B). It outlines troubleshooting tips and steps to detect an IMA failure, to isolate that failure, and to identify the root cause of the failure.

http://www.cisco.com/warp/customer/74/164.html
(available to registered users)

 

Tech Tip:
How to Configure DNS on a Host

This Tech Tip describes how to configure DNS on a host.

http://www.cisco.com/warp/customer/74/configure_dns.html
(available to registered users)

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Software Products (non Cisco IOS software)
 

Tech Tip:
Using TrafficDirector to Manage Switches

This Tech Tip explains how to use TrafficDirector to collect information for Cisco Catalyst switches that have the RMON feature enabled.

http://www.cisco.com/warp/customer/477/TD/tdir-manage-switch.html
(available to registered users)

 

Tech Tip:
Using TrafficDirector to Manage RMON I / II Devices

This document describes how TrafficDirector can be used to manage many RMON I and II devices, such as Cisco SwitchProbe, Cisco 2500 series routers, or workstations running an RMON agent. At a minimum, the device must support the RMON Statistics group on the given interface being managed with TrafficDirector.

http://www.cisco.com/warp/customer/477/TD/tdir-agent.html
(available to registered users)

 

Tech Tip:
Using "cwconfig" Command to Change Startup and Running Configuration

This Tech Tip explains the steps required to edit the startup and running configuration files of devices using the cwconfig command.

http://www.cisco.com/warp/customer/477/RME/config_start.html
(available to registered users)

 

Tech Tip:
PIX Firewall: When to Use the nat, global, static, or conduit Commands

To maximize security when implementing a CiscoSecure PIX Firewall, it is important to understand how packets are passed from and to higher security interfaces from lower security interfaces by using the Network Address Translation (NAT), global, static, and conduit commands. This document explains the differences between these commands.

http://www.cisco.com/warp/public/707/28.html
(available to registered users)

 

Tech Tip:
RME 2.x to RME 3.0 Navigational Changes

The paths to several of the drawers and folders have changed from Release 2.x to Release 3.0 of CiscoWorks2000 Resource Manager Essentials (RME). The tables in this document compare the RME 2.x paths to the updated RME 3.0 paths.

http://www.cisco.com/warp/customer/477/RME/rme_nav.html
(available to registered users)

 

Tech Tip:
Active and Standby Control Card States During a WAN Switch Software

This Tech Tip explains the states that broadband control cards (BCCs) pass through during a switch software upgrade, using an upgrade from 8.4.21 to 9.1.09 on a BPX® switch as an example.

http://www.cisco.com/warp/customer/74/switch_sw_upgrade_states.html
(available to registered users)

 

Tech Tip:
CWSI Discovery, UserTracking, and VTP Transparent Switches

This Tech Tip discusses how the discovery process works in CWSI and within the UserTracking component. It also discusses how the discovery process works on networks using Virtual Trunk Protocol (VTP) services including VTP transparent devices.

http://www.cisco.com/warp/customer/477/CWSI/ut.html
(available to registered users)

 

FAQ:
Cisco Network Registrar Frequently Asked Questions

This document contains questions that are frequently asked about the Cisco Network Registrar™system.

http://www.cisco.com/warp/customer/79/network-registra.html
(available to registered users)

 

Field Notice:
NetRanger 2.2.1.2 Signature Update Now Available for Download

The NetRanger 2.2.1.2 signature update is now available on CCO for downloading at:
http://www.cisco.com/cgi-bin/tablebuild.pl/nr221-update
Installation instructions are provided in the nrUpdate-2.2.1.2.readme file.

Note that this signature update will only install on 2.2.1 Sensors and Directors. The 2.2.1 upgrade software is available for CCO download at:
http://www.cisco.com/cgi-bin/tablebuild.pl/nr221-upgrade

IMPORTANT NOTE: There is a new IFS=/ signature (signature ID 3401), which replaces the custom string match for the replacement of the Internal Field Separator with / (IFS=/) in a Telnet session. The severity of this signature has been reduced as it affects fewer systems in use today. Additionally, to maximize system performance and to avoid this alarm from firing twice on upgraded systems, remove the custom string match by using nrConfigure to go into the "Matched Strings." Expand window and delete the String Match Signature with the ID of 2301.

The following new signatures are included in this update:

  • FTP RETR | exploit
  • FTP STOR | exploit
  • Windows Local Security Authority RPC Access
  • Windows Server Service Access
  • WWW IIS double-byte attack
  • WWW VTI Open attempt
  • WWW VTI bin list attempt
  • WWW WWWBoard attack
  • cmsd buffer overflow

A performance enhancement is also included in this update. No additional configuration is required for this enhancement.

http://www.cisco.com/cgi-bin/tablebuild.pl/nr221-update
(available to registered users)

 

Release:
Cisco LocalDirector Version lui313 Now Available on CCO

http://www.cisco.com/cgi-bin/tablebuild.pl/localdir
(available to registered users)

 

Release:
Cisco WAN Switching BPX BXM Model E Firmware Release MEE Now Available on CCO

http://www.cisco.com/kobayashi/sw-center/wan/wan-planner.shtml
(select BXM Model E software under "BPX")
(available to registered users)

 

Release:
Cisco Unified Messaging Plus Release 3.1.1 Now Available on CCO

http://www.cisco.com/cgi-bin/tablebuild.pl/umplus31
(available to registered users)

 

Release:
Cisco Secure Scanner Evaluation License Release Mar2000.2.0.scanner Software for Sun Solaris and Windows NT Now Available on CCO

http://www.cisco.com/kobayashi/sw-center/internet/netsonar.shtml
(available to registered users)

http://www.cisco.com/public/sw-center/internet/netsonar.shtml
(available for guest users)

 

Release:
Cisco Secure Scanner Promotional Software Version Mar2000.2.0 for Solaris and Windows NT Now Available on CCO

http://www.cisco.com/kobayashi/sw-center/internet/netsonar.shtml
(available to registered users)

http://www.cisco.com/public/sw-center/internet/netsonar.shtml
(available for guest users)

 

Release:
Cisco WAN Switching IGX Release NPM-Model C (RCS) Firmware Now Available on CCO

http://www.cisco.com/kobayashi/sw-center/wan/wan-planner.shtml
(available to registered users)

 

Release:
Cisco WAN Switching Strataview Release cwm9207patch6 Software Now Available on CCO

http://www.cisco.com/cgi-bin/tablebuild.pl/strataview
(available to registered users)

 

Release:
Cisco WAN Switching IGX Release NPM-Model F (RFS) Firmware Now Available on CCO

http://www.cisco.com/kobayashi/sw-center/wan/wan-planner.shtml
(available to registered users)

 

Release:
Cisco uOne Service Provider Software Version 4.1.1 Now Available on CCO

http://www.cisco.com/cgi-bin/tablebuild.pl/gengar41sp
(available to registered users)

 

Release:
Cisco WAN Switching IGX Release NPM-Model E (RES) Firmware Now Available on CCO

http://www.cisco.com/kobayashi/sw-center/wan/wan-planner.shtml
(available to registered users)

 

Release:
Cisco WAN Switching Strataview Release cwm9206patch Software Now Available on CCO

http://www.cisco.com/cgi-bin/tablebuild.pl/strataview
(available to registered users)

 

Release:
Cisco 673 Router Software Release 2.2.0 Now Available on CCO

http://www.cisco.com/cgi-bin/tablebuild.pl/600
(available to registered users)

 

Release:
Cisco WAN Switching IGX Release UVM-Model E (DED) Firmware Now Available on CCO

http://www.cisco.com/kobayashi/sw-center/wan/wan-planner.shtml
(available to registered users)

 

Release:
Cisco WAN Switching Strataview Release cwm9207patch Software Now Available on CCO

http://www.cisco.com/cgi-bin/tablebuild.pl/strataview
(available to registered users)

 

Release:
Cisco WAN Switching BPX Release BXM-Model C (MCH) Firmware Now Available on CCO

http://www.cisco.com/kobayashi/sw-center/wan/wan-planner.shtml
(available to registered users)

 

Release:
Cisco Voice Feature Card (VCWare) Version 5.09 Software Now Available on CCO

http://www.cisco.com/cgi-bin/tablebuild.pl/vcware
(available to registered users)

 

Release:
Cisco WAN Switching StrataView Plus Release 9205 Software Now Available on CCO

http://www.cisco.com/cgi-bin/tablebuild.pl/strataview
(available to registered users)

 

Release:
Cisco WAN Switching Release 9118 Software Now Available on CCO

http://www.cisco.com/kobayashi/sw-center/wan/wan-planner.shtml
(available to registered users)

 

Release:
Cisco WAN Switching MGX 8850 Release 1211Firmware Now Available on CCO

http://www.cisco.com/kobayashi/sw-center/wan/wan-planner.shtml
(available to registered users)

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Cisco IOS Software*
 

Sample Configuration:
Using the Cisco IOS Firewall to Deny Java Applets

This sample configuration demonstrates how to use the context-based access control (CBAC) feature of the Cisco IOS Firewall to block Java applets from the Internet.

http://www.cisco.com/warp/customer/110/35.html
(available to registered users)

 

Field Notice:
Cisco IOS Deferral for Catalyst 6000 12.0XE Images

Cisco IOS® 12.0(7)XE and 12.0(3)XE2 images for Catalyst 6000 MSFC modules are being deferred because of software compatibility problems with MSFC hardware. Under rare circumstances, writing certain information to the Intel Strataflash bootflash device can result in corruption of other files on the device. In the worst case, this can result in the system failing to boot on a subsequent restart.

http://www.cisco.com/warp/customer/770/fn11211.shtml
(available to registered users)

 

Field Notice:
Boot Flash Memory Size Too Small for Next Feature Release of Catalyst 8540 MSR IOS Software

The next feature release of Catalyst 8540 MSR images is too large to fit into the 8 MB boot flash SIMM.

http://www.cisco.com/warp/customer/770/fn7871.html
(available to registered users)

 

Field Notice:
Boot Flash Memory Size Too Small for Next Feature Release of Catalyst 8540 CSR IOS

The next feature release of Catalyst 8540 CSR images is too large to fit into the 8MB boot Flash SIMM.

http://www.cisco.com/warp/customer/770/fn10671.html
(available to registered users)

 

Release:
Cisco IOS Release 11.3(11a)AA Available on CCO on Tuesday, February 15

Supports: This early deployment release supports the Cisco 3640, AS5200, AS5300, and AS5800 platforms.

 

Obsolescence:
12.0(7)XR1

Release 12.0(7)XR1 has been removed from CCO. This release is replaced with 12.0(7)XR2, which is currently available on CCO.

 

Release:
Cisco IOS Release 12.0(7)XE1 Available on CCO on Tuesday, February 8

Supports: This early deployment release supports Catalyst 6000, 7100, 7200, and 7000 and 7500 RSP platforms.

 

Release:
Cisco IOS Release 11.2(19)GS3 Available on CCO on Monday, February 7

Supports: This early deployment release supports the GSR platform.

 

Release:
Cisco IOS Release 12.0(7)XR2 Available on CCO on Monday, February 7

Supports: This early deployment release supports SLT, Cisco AS5300, uBR7200, and uBR920 platforms.

 

Release:
Cisco IOS Release 12.0(8)SC1 Available on CCO on Monday, February 7

Supports: This early deployment release supports the Cisco uBR7200 platform.

 

Release:
Cisco IOS Release 12.0(9)S Available on CCO on Monday, February 7

Supports: This early deployment release supports the Cisco 7200, 7000 and 7500RSP, and GSR platforms.

 

Release:
Cisco IOS Release 12.0(9) Available on CCO on Monday, January 31

Supports: This general deployment release supports a variety of platforms.

 

Release:
Cisco IOS Release 12.0(7)XK Available on CCO on Wednesday, January 26

Supports: This early deployment release supports the Cisco 2600, 3620, 3640, 3660, 7200 and MC3810 platforms.

 

Release:
Cisco IOS Release 12.0(7)-WX5(15a) Available on CCO on Monday, January 24

Supports: This early deployment release supports the Catalyst 2948G platform.

 

Release:
Cisco IOS Release 11.3(1)DA7 Available on CCO on Monday, January 24

Supports: This early deployment release supports the Cisco 6200 platform.

 

Release:
Cisco IOS Release 12.0(5)W5(13a) Available on CCO on Monday, January 24

Supports: This early deployment release supports the C6MSM platform.

 

Release:
Cisco IOS Release 12.0(5)W5(16) Available on CCO on Monday, January 24

Supports: This early deployment release supports the Cisco 3620, 3640, 4500, 4700, C5RSFC, C5RSM, 7200, and 7000 and 7500RSP platforms.

 

Obsolescence:
12.0(7)XR

The 12.0(7)XR release was removed from CCO. This release is replaced with 12.0(7)XR1, which is currently available on CCO.

 

Release:
Cisco IOS Release 12.0(7)XR1 Available on CCO on Tuesday, January 18

Supports: This early deployment release supports SLT, Cisco uBR7200, and uRB920 platforms.

 

Release:
Cisco IOS Release 12.0(5)XE7 Available on CCO on Monday, January 17

Supports: This early deployment release supports Cisco 7100 platform.

 

Release:
Cisco IOS Release 11.1(31)CC Available on CCO on Monday, January 17

Supports: This early deployment release supports the Cisco ISR3303 and 15304 platforms.

 

Release:
Cisco IOS Release 11.3(4)HA4 Available on CCO on Monday, January 17

Supports: This early deployment release supports the Cisco ISR3303 and 15304 platforms.

   
 

*You can find all these releases at http://www.cisco.com/cgi-bin/iosplanner/iosplanner.cgi? (available to Cisco end users and partner customers with Software Center Access)

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General Information
 

FAQ:
Cisco Connection Online User Access FAQs

This FAQ includes common questions and answers about the CCO user registration process.

http://www.cisco.com/public/regguide_faq.html
(available to guest AND registered users)

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About This Newsletter
 

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  Copyright © 1999 Cisco Systems, Inc. IGX, NetSonar, PIX, and TrafficDirector are trademarks, and BPX, Catalyst, Cisco, Cisco IOS, Cisco Systems, the Cisco Systems logo, and StataView Plus are registered trademarks in the U.S. and certain other countries. All other trademarks mentioned in this document are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and any of its resellers. (9912R) http://www.cisco.com/tac
   
   
 

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