Cisco Logo Cisco Technical Assistance Center (TAC)
Newsletter
TAC Certified
Vol. 3, No. 2 February 2001 Unmatched Online Technical Support www.cisco.com/tac
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In This Issue:
What's Hot
Password Recovery
IP Routing Protocols
LAN
DSL
WAN Switches
ATM
IBM
Security
Virtual Private Network (VPN)
WAN Technology
Network Management System (NMS)
Packet Voice, Video, & Telephony
Core/High-End Routers
Content Delivery Devices
Wireless LAN
Optical Transport
Customer Contact
Cisco IOS® Software
TAC Newsletter Archive
About This Newsletter

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Please visit the "About This Newsletter" section, located at the end of this newsletter.

The Cisco TAC Newsletter provides you with online technical support, news, and information developed by Cisco TAC engineers. All the resources contained within this newsletter can be found by visiting the Cisco TAC Web site at: www.cisco.com/tac.


Upcoming Changes to the Cisco TAC Web Site

Over the course of the next four to six months, you will notice several significant changes taking place on the Cisco TAC Web site. First, a customized technical support-focused search application will be deployed on the site. We are also enhancing site personalization and content navigation. Our goal is to help you quickly and easily find answers to your technical questions. All of these changes are based on your feedback and input from product beta tests, advisory boards, customer surveys, and other events. The Cisco TAC Web Team values your input, and we are working hard to implement your great ideas! Thanks again for your commitment to making the Cisco TAC Web site a better technical support resource for everyone. Cisco TAC Web site online feedback forms can be found at:

http://www.cisco.com/public/support/feedback/solicited-promo/global.html


What's Hot

IP Telephony Solution Support:
Evaluate Your Readiness to Deploy Cisco IP Telephony Solutions

The new Web-based Cisco IP Telephony Readiness Assessment tool will help you identify best-practice steps for planning and designing IP Telephony solutions.

This interactive tool leads you through a series of questions tailored to your specific IP Telephony deployment model.

A printable report is then generated that identifies risks and provides recommendations related to the planning and design of your IP Telephony solution, including:

  • Cisco AVVID (Architecture for Voice, Video and Integrated Data) high-availability campus design
  • Capacity planning for IP Telephony
  • IP addressing plan
  • Cisco IP Telephony power protection
  • Cisco CallManager 3.0 design
  • WAN design considerations

The new Web-based Cisco IP Telephony Readiness Assessment tool can be found at:

http://tools.cisco.com/assessments/iptel_readiness/jsp/welcome.jsp
(Available to registered users only)


IP Telephony Solution Support:
Introducing the New Cisco IP Telephony Solution Guide

The new Cisco IP Telephony Solution Guide is a comprehensive, illustrative source of information about the architecture, planning, design, implementation, and operation of IP Telephony networks.

The guide discusses the core components of an IP Telephony network, including Cisco CallManager version 3.0, various Cisco gateways, and integration with the legacy telecommunications network.

Detailed information in the Solution Guide will help you:

  • Evaluate and document your existing data, telecom, and power and cabling infrastructures
  • Understand different network design models and the criteria for their selection
  • Learn best-practice methods and procedures for IP Telephony network implementation
  • Analyze and troubleshoot problems with IP Telephony networks
  • Identify the operational support requirements of an IP Telephony network

The new Cisco IP Telephony Solution Guide can be found at:

http://www.cisco.com/warp/customer/788/solution_guide/
(Available to registered users)

http://www.cisco.com/warp/public/788/solution_guide/
(Available to non-registered users)


WAN Technologies Top Issues - NEW:
Introducing a New Technical Resource for Solving Common Cisco WAN Technology Issues

The new "WAN Technologies Top Issues" section helps resolve the most common WAN technology problems encountered by Cisco TAC engineers.

These WAN troubleshooting resources will help you identify common technical issues associated with your WAN technology and provide the tools, commands, and techniques used for resolving these concerns, including:

  • Configuring and troubleshooting Frame Relay
  • Troubleshooting serial line and WAN performance problems
  • Supporting WAN controllers
  • Troubleshooting E1 and T1
  • Configuring and troubleshooting X.25
  • Configuring X.25 over Transfer Control Protocol (TCP)
  • Queuing in a WAN environment
  • Diagnosing WAN compression, PVC, and SVC issues

To get the latest Cisco WAN technology support information, please visit:

http://www.cisco.com/warp/customer/116/top_issues/wan/top_issues_wan.shtml
(Available to registered users)

http://www.cisco.com/warp/public/116/top_issues/wan/top_issues_wan.shtml
(Available to non-registered users)


IP Routing Top Issues - UPDATED:
Around-the-Clock Support for Troubleshooting and Configuring Common NAT, BGP, OSPF, HSRP Issues

The recently updated "IP Routing Top Issues" section presents detailed configurations and troubleshooting guides that resolve the most common NAT, BGP, OSPF, and HSRP support concerns.

This updated "IP Routing Top Issues" section will help you find answers to your Routing Protocol issues, including:

  • Configuring basic NAT, BGP, OSPF, HSRP
  • Troubleshooting connectivity problems in a NAT environment
  • Performing BGP load balancing, multihoming
  • Dealing with OSPF Neighbor problems
  • Configuring load sharing with HSRP
  • Configuring HSRP interface tracking
  • Avoiding HSRP instability in a switching environment

To access the "IP Routing Top Issues" section, please visit:

http://www.cisco.com/warp/customer/105/top_issues/iprouting/top_issues_rp.shtml
(Available to registered users)

http://www.cisco.com/warp/public/105/top_issues/iprouting/top_issues_rp.shtml
(Available to non-registered users)


Access-Dial Top Issues - UPDATED:
New Troubleshooting Tips for Access-Dial

The Cisco TAC "Access-Dial Top Issues" section provides technical tips and sample configurations that address the most commonly reported Access-Dial related network concerns, including:

  • Documents explaining modem, ISDN, dialer, and PPP operation
  • Guides for troubleshooting ISDN, modem, PPP calls, and T1 and E1 troubleshooting procedures
  • Procedures for evaluating the quality of modem connections on a dialup NAS
  • Advice for implementing DDR backup
  • Configuration and troubleshooting resources for Multilink PPP
  • Diagnosing and troubleshooting AAA
  • Sample configurations for Virtual Private Dialup Networks with TACACS+ or RADIUS

To access these update Access-Dial resources, please visit:

http://www.cisco.com/warp/customer/471/top_issues/access/top_issues_access.shtml
(Available to registered users)

http://www.cisco.com/warp/public/471/top_issues/access/top_issues_access.shtml
(Available to non-registered users)


Cisco Secure PIX(TM) Firewall Top Issues - UPDATED:
New and Updated Support Resources Resolve Common PIX Challenges

The updated "Cisco Secure PIX Firewall Top Issues" section will teach you the same techniques that a Cisco TAC engineer uses when troubleshooting a security concern with Cisco PIX Products.

The "Cisco Secure PIX Firewall Top Issues" section provides more than 10 step-by-step solutions that will resolve the most common PIX Product-related issues, including:

  • PIX to PIX IPSec
  • PIX to PIX and VPN Client 1.1
  • Installing or upgrading an activation key in PIX Solutions
  • PIX connectivity issues
  • Interpreting PIX syslog error messages

To begin troubleshooting with the "Cisco Secure PIX Firewall Top Issues" section, please visit:

http://www.cisco.com/warp/customer/110/top_issues/pix/pix_index.shtml
(Available to registered users)

http://www.cisco.com/warp/public/110/top_issues/pix/pix_index.shtml
(Available to non-registered users)


TAC Troubleshooting Assistant Tool:
New Information for Solving Common PIX and PPP Problems

The Cisco TAC Troubleshooting Assistant Tool's Secure PIX Firewall Series and PPP knowledge bases offer new solutions for addressing client access and failover issues.

Enhanced PIX troubleshooting is now available in the following areas, including:

  • Point-to-Point Tunneling Protocol (PPTP)
  • Error messages
  • Trivial File Transfer Protocol (TFTP)

To begin using the Troubleshooting Assistant's updated PIX knowledge base, please visit:

http://www.cisco.com/tac/newsletter/vol3no2/pix.html
(Available to registered users)

Enhanced PPP troubleshooting is now available in the following areas, including:

  • Link Control Protocol (LCP)
  • Network Layer Protocol (NLP)
  • Network Control Protocol (NCP)
  • PPP authentication failure
  • PPP link stability and inability to route packets over
  • PPP links and Multilink PPP issues

If you are new to PPP technology, visit the Troubleshooting Assistant's PPP "Step-by-Step Help" knowledge base at:

http://www.cisco.com/tac/newsletter/vol3no2/ppp.html
(Available to registered users only)

If you are experienced with PPP technology, visit the Troubleshooting Assistant's PPP "Advanced Search" knowledge base at:

http://www.cisco.com/tac/newsletter/vol3no2/ppp_a.html
(Available to registered users only)


Wireless LAN Product Pages:
New Support Resources for the Cisco Aironet 340 and Cisco Aironet 350

Extensive installation, configuration, product specification, software, and release note information for the Cisco Aironet(R) 340 and Cisco Aironet 350 Series Wireless LAN products are now available for immediate use on the Cisco TAC Wireless LAN Product Pages.

The Cisco Aironet products supported include:

  • Cisco Aironet 340, Aironet 350 Series Access Points
  • Cisco Aironet 340, Aironet 350 Series Antennas
  • Cisco Aironet 340, Aironet 350 Series Client Adapters
  • Cisco Aironet 340, Aironet 350 Series Ethernet Bridges

To access these new Cisco Aironet support resources, please visit the "Wireless LAN" section located at:

http://www.cisco.com/cgi-bin/Support/PSP/index.pl?i=Products#Wireless_LAN
(Available to registered users)

http://cisco.com/pcgi-bin/Support/PSP/index.pl?i=Products#Wireless_LAN
(Available to non-registered users)


Network Management Systems Product Pages:
New Support Resources for Cisco Info Center and Cisco IP Manager

Online technical support for Cisco Info Center and Cisco IP Manager products is now available in the Cisco TAC Network Management Systems (NMS) Product Pages.

These Cisco Info Center and Cisco IP Manager support pages provide both hardware and software support, including:

  • Hardware, systems, platform requirements and recommendations
  • Release notes
  • Bug identification
  • Software patch downloads
  • New feature information
  • Software, hardware installation, and procedures
  • Configuration information
  • Compatibility guides

To access the new Cisco Info Center and Cisco IP Manager support resources, please visit the NMS section located at:

http://www.cisco.com/cgi-bin/Support/PSP/index.pl?i=Products#Network_Management_Systems
(Available to registered users)

http://www.cisco.com/pcgi-bin/Support/PSP/index.pl?i=Products#Network_Management_Systems
(Available to non-registered users)


TAC Output Interpreter Tool:
New Feature Provides Additional Insights When Troubleshooting Router Problems

The Cisco TAC Output Interpreter tool now offers a new level of analysis for selected router commands.

This new feature provides errors, warnings, and status information, as well as links and explanations to helpful references that are customized to individual command outputs.

The Output Interpreter tool parses router "show" command outputs and aids in the fast diagnosis of network issues by reporting potential problems and suggested fixes.

Updated commands that offer the new advanced level of analysis include:

  • show buffers
  • show interface [Ethernet | fast Ethernet]
  • show memory
  • show proc cpu
  • show version
  • debug radius

To access the Output Interpreter tool, please visit:

http://cco.cisco.com/support/OutputInterpreter/parser.html
(Available to registered users)


Online "TAC Web Tools Showcase":
FREE Training on Cisco Web-based Technical Support Resources

The online Cisco TAC "Web Tools Showcase" provides training on how to effectively utilize Cisco TAC Web Site resources. Participate by watching the presentation online while you listen to a live presenter over the phone.

This training session will teach you how to:

  • Find critical information for implementing and configuring products and networks
  • Troubleshoot network issues
  • Enhance your networking skills
  • Design and support your networks

If you can't attend a live broadcast, log on and replay an archived showcase and learn how to be more effective in managing your network with Cisco TAC Web Site resources.

To view training dates and register for this online seminar, please visit:

http://cisco.evoke.com
(Available to registered and non-registered users)


Cisco Networkers 2001:
Registration Now Open for Asia Pacific and North America

The Cisco Networkers 2001 conference brings you face to face with top Cisco networking professionals in an opportunity to learn about the hottest Cisco products and technologies, as well as review industry trends and obtain vital networking updates. Registration is now open for Asia Pacific and North America.

Features of Cisco Networkers 2001 include:

  • Over 100 technical sessions on the hottest industry topics
  • Power sessions: In-depth, full-day technical tutorials
  • World of solutions: Dynamic learning environment featuring key Cisco partners, as well as the latest networking products and technologies
  • FREE Cisco Career Certifications testing for preregistered attendees
  • FREE CCIE(TM) routing and switching qualification exam for preregistered attendees
  • Personalized network design clinics with Cisco TAC engineers and more...

For dates, registration, and session information, please visit:

http://www.cisco.com/networkers


Networking Professionals Connection:
Check Out the Upcoming "Ask the Expert" Events

  • Intrusion Detection Security: February 19 to March 2
  • QoS Advanced Resource Management: March 5 to 16

To participate in these events, please visit:

http://www.cisco.com/go/netpro


Password Recovery

Tech Tip:
New LAN Switch Modules and Wireless LAN Password Recovery Documents Now Available

New password recovery documents for LAN Switch Modules and Wireless LAN have been added to the Cisco TAC Web site's "Password Recovery Procedures Index".

In the LAN Switch Modules section, you can locate informaiton for Catalyst (R) 6000 LANE Modules.

In the Wireless LAN section, you can locate information for Cisco Aironet (R) 340 Access Points.

To access these new password recovery documents, visit:

http://www.cisco.com/warp/customer/474/
(available to registered users)

http://www.cisco.com/warp/public/474/
(available to non-registered users)


IP Routing Protocols

Sample Configuration:
Configuring MPLS Basic Traffic Engineering Using IS-IS

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

http://www.cisco.com/warp/public/105/mplsteisis.html
(available to non-registered users)


Sample Configuration:
Configuring Basic MPLS Using IS-IS

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

http://www.cisco.com/warp/public/105/mplsisis.html
(available to non-registered users)


Sample Configuration:
Configuring Basic MPLS Using OSPF

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

http://www.cisco.com/warp/public/105/mplsospf.html
(available to non-registered users)


Tech Note:
Understanding OSPF Neighbor Problems

http://www.cisco.com/warp/customer/104/29.html
(available to registered users)

http://www.cisco.com/warp/public/104/29.html
(available to non-registered users)


Tech Note:
Basic Multicast Troubleshooting Tools

http://www.cisco.com/warp/customer/105/57.html
(available to registered users)

http://www.cisco.com/warp/public/105/57.html
(available to non-registered users)


LAN

Tech Note:
System Requirements to Implement Gigabit Ethernet

http://www.cisco.com/warp/customer/473/52.html
(available to registered users)

http://www.cisco.com/warp/public/473/52.html
(available to non-registered users)


Tech Note:
System Requirements to Implement FDDI

http://www.cisco.com/warp/customer/473/54.html
(available to registered users)

http://www.cisco.com/warp/public/473/54.html
(available to non-registered users)


Tech Note:
System Requirements to Implement MLS

http://www.cisco.com/warp/customer/473/55.html
(available to registered users)

http://www.cisco.com/warp/public/473/55.html
(available to non-registered users)


Field Notice:
Performance Issue with Intel Pro/1000T NICs connecting to Catalyst 4000 and 6000 Series

http://www.cisco.com/warp/customer/770/fn13054.html
(available to registered users)

http://www.cisco.com/warp/public/770/fn13054.html
(available to non-registered user)


DSL

Sample Configuration:
Configuring PVC and PVP Cross Connections for the Cisco 6400 NRP/NSP

http://www.cisco.com/warp/customer/794/6400brdg_rtng.html
(available to registered users)

http://www.cisco.com/warp/public/794/6400brdg_rtng.html
(available to non-registered users)


Sample Configuration:
Configuring a Cisco 1417 Router with IP Unnumbered E0, DHCP, PPPoA, and PPP-PAP

http://www.cisco.com/warp/customer/794/1417dhcp_unnum.html
(available to registered users)

http://www.cisco.com/warp/public/794/1417dhcp_unnum.html
(available to non-registered users)


Sample Configuration:
Configuring a Cisco 1417 Router with IP Unnumbered E0, PPPoA, PPP-CHAP, and Manually Configured Local LAN Devices

http://www.cisco.com/warp/customer/794/1417unnum.html
(available to registered users)

http://www.cisco.com/warp/public/794/1417unnum.html
(available to non-registered users)


Sample Configuration:
Configuring a Cisco 1417 Router with a Single IP Address, DHCP, PPPoA, and PPP-CHAP

http://www.cisco.com/warp/customer/794/1417dhcp_1ip.html
(available to registered users)

http://www.cisco.com/warp/public/794/1417dhcp_1ip.html
(available to non-registered user)


Sample Configuration:
Configuring a Cisco 827 Router with a Single IP Address, DHCP, PPPoA, and PPP-PAP

http://www.cisco.com/warp/customer/794/827dhcp_1ip.html
(available to registered users)

http://www.cisco.com/warp/public/794/827dhcp_1ip.html
(available to non-registered user)


Sample Configuration:
Configuring a Cisco 827 Router with IP Unnumbered E0, DHCP, PPPoA, and PPP-PAP

http://www.cisco.com/warp/customer/794/827dhcp_unnum.html
(available to registered users)

http://www.cisco.com/warp/public/794/827dhcp_unnum.html
(available to non-registered users)


Sample Configuration:
Configuring a Cisco 827 Router with IP Unnumbered E0, PPPoA, PPP-CHAP, and Manually Configured Local LAN Devices

http://www.cisco.com/warp/customer/794/827unnum.html
(available to registered users)

http://www.cisco.com/warp/public/794/827unnum.html
(available to non-registered users)


White Paper:
Routed Bridged Encapsulation Baseline Architecture

http://www.cisco.com/warp/customer/794/routed_bridged_encap.html
(available to registered users)

http://www.cisco.com/warp/public/794/routed_bridged_encap.html
(available to non-registered users)


WAN Switches

Sample Configuration:
Configuring an MGX (TM) 8220 Remote Feeder

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

http://www.cisco.com/warp/public/74/rem_fdr_index.html
(available to non-registered users)


ATM

Sample Configuration:
QoS over LANE

http://www.cisco.com/warp/customer/121/qos_over_lane.shtml
(available to registered users)

http://www.cisco.com/warp/public/121/qos_over_lane.shtml
(available to non-registered users)


Tech Note:
CRC Troubleshooting Guide for ATM Interfaces

http://www.cisco.com/warp/customer/121/crc_tshooting.html
(available to registered users)

http://www.cisco.com/warp/public/121/crc_tshooting.html
(available to non-registered users)


Tech Note:
Traffic Shaping with the Cisco 2600 and 3600 Router Series E3, T3, and OC-3 ATM Interfaces

http://www.cisco.com/warp/customer/121/traffic_shape_3600.shtml
(available to registered users)

http://www.cisco.com/warp/public/121/traffic_shape_3600.shtml
(available to non-registered users)


IBM

Sample Configuration:
DLSw Dial on Demand over ISDN

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

http://www.cisco.com/warp/public/697/dlswdodisdn.html
(available to non-registered users)


Security

Sample Configuration:
PIX to PIX and VPN Client 1.1

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

http://www.cisco.com/warp/public/110/pixpixvpn.html
(available to non-registered users)


Sample Configuration:
IPSec with Routing Protocols Using GRE Tunneling

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

http://www.cisco.com/warp/public/707/ipsec_gre.html
(available to non-registered user)


Tech Note:
Archiving and Rollback Procedures for Cisco Secure Policy Manager 2.x

http://www.cisco.com/warp/customer/480/cspm2x.html
(available to registered users)

http://www.cisco.com/warp/public/480/cspm2x.html
(available to non-registered users)


Field Notice:
Cisco Secure PIX (TM) Firewall: PIX 525 Ethernet EEPROM Programming

http://www.cisco.com/warp/customer/770/fn13021.html
(available to registered users)

http://www.cisco.com/warp/public/770/fn13021.html
(available to non-registered users)


Virtual Private Network (VPN)

Tech Note:
VPN Clients with Microsoft Routing Problems

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

http://www.cisco.com/warp/public/471/ms_route.html
(available to non-registered users)


Tech Note:
How to Configure the Cisco VPN 3000 Concentrator PPTP with Local Authentication

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

http://www.cisco.com/warp/public/471/altigapptp.html
(available to non-registered users)


Tech Note:
How to Configure the Cisco VPN 3000 Concentrator PPTP with CSNT 2.5 RADIUS Authentication

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

http://www.cisco.com/warp/public/471/altigacsnt.html
(available to non-registered users)


WAN Technology *

Sample Configuration:
X.25 over ISDN D Channel Connecting to X.25 over Leased-Line ISDN B Channel

http://www.cisco.com/warp/customer/133/x25_dbchannel.html
(available to registered users)

http://www.cisco.com/warp/public/133/x25_dbchannel.html
(available to non-registered users)


Tech Note:
X.25 Error Messages

http://www.cisco.com/warp/customer/133/x25_error_mssg.html
(available to registered users)

http://www.cisco.com/warp/public/133/x25_error_mssg.html
(available to non-registered user)


Tech Note:
X.25 Virtual Circuit States

http://www.cisco.com/warp/customer/133/x25_states.html
(available to registered users)

http://www.cisco.com/warp/public/133/x25_states.html
(available to non-registered user)


Tech Note:
E1 Troubleshooting

http://www.cisco.com/warp/customer/116/e1_flchrt_main.html
(available to registered users)

http://www.cisco.com/warp/public/116/e1_flchrt_main.html
(available to non-registered users)


Tech Note:
E1 Alarm Troubleshooting

http://www.cisco.com/warp/customer/116/E1_alarms.html
(available to registered users)

http://www.cisco.com/warp/public/116/E1_alarms.html
(available to non-registered users)


Tech Note:
E1 Alarm Troubleshooting Flowchart

http://www.cisco.com/warp/customer/116/e1_flchrt_alarm_1.html
(available to registered users)

http://www.cisco.com/warp/public/116/e1_flchrt_alarm_1.html
(available to non-registered users)


Tech Note:
E1 Alarm Troubleshooting - Remote Alarm Indication

http://www.cisco.com/warp/customer/116/e1_flchrt_alarm_2.html
(available to registered users)

http://www.cisco.com/warp/public/116/e1_flchrt_alarm_2.html
(available to non-registered users)


Tech Note:
E1 Error Events Troubleshooting

http://www.cisco.com/warp/customer/116/E1_error.html
(available to registered users)

http://www.cisco.com/warp/public/116/E1_error.html
(available to non-registered users)


Tech Note:
E1 Error Event Troubleshooting Flowchart

http://www.cisco.com/warp/customer/116/e1_flchrt_error.html
(available to registered users)

http://www.cisco.com/warp/public/116/e1_flchrt_error.html
(available to non-registered users)


Tech Note:
E1 Layer 1 Troubleshooting

http://www.cisco.com/warp/customer/116/E1_layer1.html
(available to registered users)

http://www.cisco.com/warp/public/116/E1_layer1.html
(available to non-registered users)


Tech Note:
E1 Layer 1 Troubleshooting Flowchart

http://www.cisco.com/warp/customer/116/e1_flchrt_layer1.html
(available to registered users)

http://www.cisco.com/warp/public/116/e1_flchrt_layer1.html
(available to non-registered users)


Tech Note:
E1 PRI Troubleshooting

http://www.cisco.com/warp/customer/116/E1_pri.html
(available to registered users)

http://www.cisco.com/warp/public/116/E1_pri.html
(available to non-registered users)


Tech Note:
E1 PRI Troubleshooting Flowchart

http://www.cisco.com/warp/customer/116/e1_flchrt_pri.html
(available to registered users)

http://www.cisco.com/warp/public/116/e1_flchrt_pri.html
(available to non-registered users)


Tech Note:
Hard Plug Loopback Tests for E1 Lines

http://www.cisco.com/warp/customer/116/e1_hard_loopback.html
(available to registered users)

http://www.cisco.com/warp/public/116/e1_hard_loopback.html
(available to non-registered users)


Tech Note:
Hard Plug Loopback Test for E1 Lines Flowchart

http://www.cisco.com/warp/customer/116/e1_flchrt_loop.html
(available to registered users)

http://www.cisco.com/warp/public/116/e1_flchrt_loop.html
(available to non-registered users)


Tech Note:
Understanding the show controller e1 Command

http://www.cisco.com/warp/customer/116/show_ce1.html
(available to registered users)

http://www.cisco.com/warp/public/116/show_ce1.html
(available to non-registered users)


Tech Note:
The show compress Command

http://www.cisco.com/warp/customer/116/compress_show.html
(available to registered users)

http://www.cisco.com/warp/public/116/compress_show.html
(available to non-registered users)


Tech Note:
LAPB Error Messages

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

http://www.cisco.com/warp/public/133/lapb_error_mssg.html
(available to non-registered user)


Tech Note:
WAN Controllers

http://www.cisco.com/warp/customer/116/wan_controllers.html
(available to registered users)

http://www.cisco.com/warp/public/116/wan_controllers.html
(available to non-registered users)


Tech Note:
Understanding Data Compression

http://www.cisco.com/warp/customer/116/compress_overview.html
(available to registered users)

http://www.cisco.com/warp/public/116/compress_overview.html
(available to non-registered users)


*If you are interested in E1 content, you can find more documents in the Access section of the TAC Technologies pages:

http://www.cisco.com/cgi-bin/Support/PSP/index.pl?i=Technologies#Access
(available to registered users)

http://www.cisco.com/pcgi-bin/Support/PSP/index.pl?i=Technologies#Access
(available to non-registered users)


Network Management Systems (NMS)

Tech Note:
IP Simple Network Management Protocol (SNMP) Causes High CPU Utilization

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

http://www.cisco.com/warp/public/477/SNMP/ipsnmphighcpu.html
(available to non-registered users)


Tech Note:
SWIM Frequently Asked Questions II

http://www.cisco.com/warp/customer/477/RME/swimfaq2.html
(available to registered users)

http://www.cisco.com/warp/public/477/RME/swimfaq2.html
(available to non-registered users)


Tech Note:
SWIM Frequently Asked Questions III

http://www.cisco.com/warp/customer/477/RME/swimfaq3.html
(available to registered users)

http://www.cisco.com/warp/public/477/RME/swimfaq3.html
(available to non-registered users)


Tech Note:
Cisco IOS SNMP Traps Supported and How to Configure Them

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

http://www.cisco.com/warp/public/477/SNMP/snmp_traps.html
(available to non-registered users)


Field Notice:
Campus Bundle for HP-UX Support on HP Business-Class Servers

http://www.cisco.com/warp/customer/770/fn13017.shtml
(available to registered users)

http://www.cisco.com/warp/public/770/fn13017.shtml
(available to non-registered users)


Packet Voice, Video, & Telephony

IP Telephony Solution Guide

For a comprehensive, illustrative solution guide that covers the full lifecycle of steps necessary for planning, designing, implementing, and operating an IP telephony network, visit:

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

http://www.cisco.com/warp/public/788/solution_guide/
(available to non-registered users)


IP Telephony Readiness Assessment

For a web-based, adaptive readiness assessment comprised of multiple-choice questions that leads organizations through key concepts integral to planning and designing a highly-available IP telephony solution, visit:

http://tools.cisco.com/assessments/iptel_readiness/jsp/welcome.jsp
(available to registered users)


Top Issues:
Packet Voice Top Issues

http://www.cisco.com/warp/customer/788/top_issues/vox/vox_top_issues.shtml
(available to registered users)

http://www.cisco.com/warp/public/788/top_issues/vox/vox_top_issues.shtml
(available to non-registered users)


Tech Note:
Eliminating the F1 Prompt at Boot When All Power Supplies Are Not Plugged in

http://www.cisco.com/warp/customer/788/AVVID/eliminating_f11.html
(available to registered users)

http://www.cisco.com/warp/public/788/AVVID/eliminating_f11.html
(available to non-registered users)


Tech Note:
Eliminating the no SCSI Devices Found Error

http://www.cisco.com/warp/customer/788/AVVID/no_scsi_dev_error1.html
(available to registered users)

http://www.cisco.com/warp/public/788/AVVID/no_scsi_dev_error1.html
(available to non-registered users)


Sample Configuration:
E1 R2 Signaling Configuration and Troubleshooting

http://www.cisco.com/warp/customer/788/signalling/e1r2config.html
(available to registered users)

http://www.cisco.com/warp/public/788/signalling/e1r2config.html
(available to non-registered users)


Tech Note:
E1 R2 Signaling Theory

http://www.cisco.com/warp/customer/788/signalling/e1_r2_sig.html
(available to registered users)

http://www.cisco.com/warp/public/788/signalling/e1_r2_sig.html
(available to non-registered users)


Tech Note:
E1 R2 Customization with the cas-custom Command

http://www.cisco.com/warp/customer/788/signalling/e1_r2_cas_custom.html
(available to registered users)

http://www.cisco.com/warp/public/788/signalling/e1_r2_cas_custom.html
(available to non-registered users)


Tech Note:
PSTN Callers Not Hearing any Ring Back When They Call IP Phones

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

http://www.cisco.com/warp/public/788/AVVID/pstn_ip_ring.html
(available to non-registered user)


Core/High-End Routers

Field Notice:
Some Cisco 7200 I/O Controllers May Not Boot with NPE-100, NPE-150, and NPE-200 Cards

http://www.cisco.com/warp/customer/770/fn12932.html
(available to registered users)

http://www.cisco.com/warp/public/770/fn12932.html
(available to non-registered users)


Field Notice:
CPAs Not Loading Default Microcode from SanDisk

http://www.cisco.com/warp/customer/770/fn13050.shtml
(available to registered users)

http://www.cisco.com/warp/public/770/fn13050.shtml
(available to non-registered users)


Content Delivery Devices

Tech Note:
CDN Service Provider Version 1.0 Defects

http://www.cisco.com/warp/customer/117/CustomerBugsCDN-SP1.0.html
(available to registered users)

http://www.cisco.com/warp/public/117/CustomerBugsCDN-SP1.0.html
(available to non-registered users)


Wireless LAN

Top Issues:
Wireless LAN Top Issues

http://www.cisco.com/warp/customer/102/top_issues/wireless_lan/top_issues_wireless_lan.shtml
(available to registered users)

http://www.cisco.com/warp/public/102/top_issues/wireless_lan/top_issues_wireless_lan.shtml
(available to non-registered users)


Tech Note:
Cisco Aironet Hardware Frequently Asked Questions

http://www.cisco.com/warp/customer/102/faq-hardware.html
(available to registered users)

http://www.cisco.com/warp/public/102/faq-hardware.html
(available to non-registered users)


Tech Note:
Cisco Aironet Driver and Firmware Frequently Asked Questions

http://www.cisco.com/warp/customer/102/driver-problems.shtml
(available to registered users)

http://www.cisco.com/warp/public/102/driver-problems.shtml
(available to non-registered users)


Tech Note:
Upgrading the Cisco Aironet 340 Series Access Point Firmware via the Console

http://www.cisco.com/warp/customer/102/ap-fw-upgrade.shtml
(available to registered users)

http://www.cisco.com/warp/public/102/ap-fw-upgrade.shtml
(available to non-registered users)


Tech Note:
Initial Configuration of the Cisco Aironet 340 Series Bridge

http://www.cisco.com/warp/customer/102/confbr.html
(available to registered users)

http://www.cisco.com/warp/public/102/confbr.html
(available to non-registered users)


Tech Note:
Error Statistics on the Cisco Aironet 340 Series Bridge

http://www.cisco.com/warp/customer/102/errors.html
(available to registered users)

http://www.cisco.com/warp/public/102/errors.html
(available to non-registered users)


Tech Note:
Configuring Wired Equivalent Privacy

http://www.cisco.com/warp/customer/102/confwep.html
(available to registered users)

http://www.cisco.com/warp/public/102/confwep.html
(available to non-registered users)


Tech Note:
Configuring the BSE342 and BSM342 Base Stations

http://www.cisco.com/warp/customer/102/basestation.html
(available to registered users)

http://www.cisco.com/warp/public/102/basestation.html
(available to non-registered users)


Tech Note:
Troubleshooting Connectivity in a Wireless Network

http://www.cisco.com/warp/customer/102/connectivity.html
(available to registered users)

http://www.cisco.com/warp/public/102/connectivity.html
(available to non-registered users)


Tech Note:
Problems Affecting Radio Frequency Communication

http://www.cisco.com/warp/customer/102/rf-problems.shtml
(available to registered users)

http://www.cisco.com/warp/public/102/rf-problems.shtml
(available to non-registered users)


Field Notice:
Cisco Aironet WGB340 Series: Cannot Associate on Initial Power Up

http://www.cisco.com/warp/customer/770/fn13036.html
(available to registered users)

http://www.cisco.com/warp/public/770/fn13036.html
(available to non-registered users)


Optical Transport

Tech Note:
Clearing DS3XM Alarm Indication Signal-Virtual Tributary Alarms

http://www.cisco.com/warp/customer/127/clearalarms.html
(available to registered users)

http://www.cisco.com/warp/public/127/clearalarms.html
(available to non-registered users)


Field Notice:
ONS15454 TL1 Commands ENT-CRS-VT1 and DLT-CRS-VT1 Cause TCC Resets

http://www.cisco.com/warp/customer/770/fn13018.shtml
(available to registered users)

http://www.cisco.com/warp/public/770/fn13018.shtml
(available to non-registered users)


Customer Contact

Tech Note:
How To Clear an SQL Server Transaction Log

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

http://www.cisco.com/warp/public/78/clear_sql_log.html
(available to non-registered users)


Cisco IOS Software*

Tech Note:
Cisco IOS Software Release 12.1(3)XT

http://www.cisco.com/warp/customer/620/ios_12_1_3_xt.shtml
(available to registered users)

http://www.cisco.com/warp/public/620/ios_12_1_3_xt.shtml
(available to non-registered users)


Field Notice:
Cisco IOS TFTP Client Cannot Transfer Files Larger than 16MB

http://www.cisco.com/warp/customer/770/fn13026.shtml
(available to registered users)

http://www.cisco.com/warp/public/770/fn13026.shtml
(available to non-registered users)


* 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 TAC Software Center Access)


TAC Newsletter Archive

To view the past issues of the Cisco TAC Newsletters, please visit:
http://www.cisco.com/tac/newsletter


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