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I intend to try to post an article every month. Articles 1-142 are from Enterprise Networking and Server Magazine, formerly CiscoWorld Magazine. The articles written
in 2007 are strictly white papers for this web site. Click here to jump to a table of ZIP archived PDF versions of the articles. |
Articles
In reverse
chronological order...
|
Tech Areas |
Additional Comments |
PDF Version |
|
145 Cisco Network Access Control (NAC) 6/22/2007  |
Security, NAC, Design | PDF |
|
| 144 Data Center Segmentation 2/25/2007 |
Data Center, Security, NAC Appliance, FWSM, Design | |
PDF |
| 143 CNC Newsletter based on Introduction
to IPv6 -- Part 1 (below). 2/13/2007 Available as PDF only. |
IPv6, Newsletter | I was too busy to complete and post an article in January 2007. Part of that was due to the mechanics of getting this email newsletter published. To register to receive the newsletter, click here. | |
| 142 Introduction to IPv6 -- Part 3 12/3/2006 | IPv6, Routing, Tunnels, Security | IPv6 tunnels, IPv6 multi-homing and SHIM6. | |
| 141 Introduction to IPv6 -- Part 2 11/11/2006
Fixed typos re unique local addresses 1/8/2006.
Fixed typo about source addresses, 8/24/2007.
|
IPv6, Routing, Switching, Security | IPv6 addressing, routing, links to security and IPv6 portal/article sites. | |
| 140 Introduction to IPv6 -- Part 1 10/9/2006 | IPv6, Routing, Switching |
Why should you care about IPv6? |
|
| 139 Understanding PIX Behavior 9/11/2006 | Security |
||
| 138 IP Multicast, Best Practices and Control 8/7/2006 | IP Multicast, Routing |
||
| 137 More
AAA: Simple Authentication, Authorization, and
Accounting 7/10/2006 Version of this with smaller images (might be more readable but requires a browser that lets you separately view/magnify images). |
AAA, TACACS+, Security, Network Management | The PDF version is large due to screen capture images. | PDF 3.4 MB |
| 136 AAA
Authentication Basics 6/8/2006 Version of this with smaller images (might be more readable but requires a browser that lets you separately view/magnify images). |
AAA, TACACS+, Security,
Network Management |
The PDF version is large due to
screen capture images. |
PDF 3.9 MB |
| 135 A Smorgasbord of Small Topics 5/7/2006 | QoS, WAN, MPLS VPN customer,
Routing |
PDF |
|
| 134 The New Cisco Channel Specializations 4/5/2006 | Training, Courses, Cisco
Certifications |
||
133 Cisco Secure Access Control Server for Windows 4.0 3/11/2006 updated format 4/4/2006Version of this with smaller images (might be more readable but requires a browser that lets you separately view/magnify images). |
AAA, RADIUS, TACACS+, Security, Network Management, 802.1x, NAC | See also the below
links to detailed ACS 4.0 screen captures -- 4 large PDF files
(virtual tutorial). The PDF version is large due to screen capture images. |
PDF 6.2 MB |
| 132 Configuring Cisco Optimized Edge Routing (OER) 2/7/2006 | IP Routing |
||
| 131 Basics of Cisco Optimized Edge Routing (OER) 1/11/2006 | IP Routing, Enterprise design |
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| 130 A Bit More 6500 QoS 12/10/2005. Links updated 9/18/2008 | QoS, Switch |
||
| 129 QoS for the Cisco 6500 (Revisited) 11/4/2005 | QoS, Switch |
||
| 128 Managing Cisco Devices with ASDM and SDM 10/9/2005 | Configuration, Security |
Updated GUI power tools, great
for NAT, IPsec VPN! |
|
| 127 NetFlow and IPFIX 9/4/2005, updated 11/4/2005 | Network Management, NetFlow |
Updates 2001 article, talks
about IPFIX standard. 11/4/05 update fixes a reference to show commands
that didn't get included. |
|
| 126 New Features in Cisco IOS 12.4 8/15/2005 | Cisco IOS |
||
| 125 Buying Layer 2 Ethernet Services 7/8/2005 | MPLS, Optical, Switch,
Enterprise design |
||
| 124 Enterprise Buyer's Guide to Layer 3 MPLS VPN Services 6/13/2005 | MPLS VPN, Enterprise design |
For the 99% of Enterprises
buying MPLS VPN services, as opposed to deploying internal MPLS. |
|
| 123 Recent Trends In Security 5/4/2005 | Security, Wireless, Design,
VoIP, IP Telephony |
PDF |
|
| 122 How Secure is WEP, Anyway? 4/7/2005 | Wireless, Security, Labwork |
||
| 121 Designing
Wireless LANs, Part 2 2/27/2005 |
Wireless, Security, Design |
||
| 120 Designing Wireless LANs 2/1/2005 | Wireless, Security, Design |
||
| 119 TCL'ing Your Cisco Router 1/3/2005 | Tcl, Cisco IOS, Labwork |
Program your Cisco router using
Tcl! |
|
| 118 The Stress Is On QoS 12/4/2004 | QoS |
How to build a demo lab showing
the benefits of QoS! |
|
| 117 The Missing Link 11/4/2004, updated 1/16/2005 | Routing, Switching, HSRP, Design |
When you should connect
distribution layer switches, and why. Updated 1/16/2005: clarifyied that either a double outage occurs or only one access switch is in VLAN 10. |
PDF |
| 116 Certificate Authorities 10/5/2004, updated 12/17/2004 | PKI, Certificate Authorities,
Security |
Useful for router labs! 12/17/04: Corrected statement about DNS. |
|
| 115 Making Your Router Serve 9/6/2004 | DHCP, DNS, IP Services |
Useful for router labs! |
|
| 114 Working with Cisco VPN Concentrator 7/30/2004 | IPSec, VPN, Security |
||
| 113 Clever Addressing Schemes 7/6/2004 | Design |
||
| 112 Case
Study: IPSec VPN Performance 6/18/2004, with Israel Engle |
Security, IPSec, Performance
Testing |
||
| 111 Deploying Identity-Based Access Control 5/2/2004 | Security, 802.1x, NAC |
||
| 110 Examining 802.1x and EAP 4/6/2004 | Security, 802.1x
Switching,
Wireless |
||
| 109 Managing Security with SDM 3/8/2004 | Cisco IOS, Security, IPSec VPN | ||
| 108 Managing
a Cisco PIX with PDM 2/6/2004 |
Security, IPSec VPN |
||
| 107 Buying Metro Ethernet Services 1/4/2004 | WAN, Access, Switching, MPLS |
||
| 106 Security Best Practices 12/7/2003, with Carole Warner Reece | Security |
See Carole's forthcoming Cisco
Packet magazine article on security! |
|
| 105 Network Detection of Worms and Viruses 10/29/2003, with Carole Warner Reece | Security, Net Mgmt, NetFlow |
||
| 104 Vaccination Against Worms and Viruses 10/6/2003, with Carole Warner Reece | Security |
||
| 103 Network Management with Periscope 9/8/2003, with Kevin Stone. Updated article itself, 3/18/2008: product name is now NetMRI. | Network Management, Performance |
Periscope is now called NetMRI
(2005). It is sold by Netcordia, found at http://www.netcordia.com. |
|
| 102 Troubleshooting Poor Performance, and Dsniff Woes, 8/9/2003 | Security, Network Management,
Performance |
||
| 101 802.11 Wireless LAN Security and the Cisco SWAN Program , 7/6/2003 | Wireless, Security, Design |
Revised slightly, re-posted 7/7/2003 |
PDF |
| 100 Cisco IOS 12.3
Features , 6/3/2003 |
Cisco IOS, QoS, VPN, Security |
|
PDF |
|
99 Path MTU Discovery , 5/5/2003.
Minor clarity update 3/9/2004. |
IP, Tunnel, VPN, Security |
||
|
98 Visual Tour of Cisco CallManager 3.2 -- Part 3 , 4/8/2003 |
Voice, VoIP, IP Telephony |
See also Call Manager 3.2 Screen Captures below, posted 3/3/2003. |
|
|
97 Visual Tour of Cisco CallManager 3.2 -- Part 2 , 3/6/2003 |
Voice, VoIP, IP Telephony |
See also Call Manager 3.2 Screen Captures below, posted 3/3/2003. |
|
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96 Visual Tour of Cisco CallManager 3.2 -- Part 1 , 2/6/2003 |
Voice, VoIP, IP Telephony |
See also Call Manager 3.2 Screen Captures below, posted 3/3/2003. |
|
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95 Network Management Configuration Templates , 1/2/2003, updated 12/3/2006 |
Net Mgmt |
6/1/2003: added note about set errdisable-timeout. 12/3/2006: adding missing and useful clock summer-time recurring command |
|
|
94 Troubleshooting Too Much Multicast , 12/5/02 |
IP Multicast, Routing |
Real World Story |
|
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93 QoS Device Manager , 11/5/02 |
QoS, Net Mgmt |
|
PDF |
|
92 MPLS VPN's From the Customer Side , 10/2/02 |
MPLS, Routing |
Updated 12/30/2002: Cisco does now support EIGRP as PE-CE protcol for MPLS VPN's as of 12.0(22) S. See the article for a link to the details. |
|
|
91 Wireless LAN Security , 9/3/02, with Marty Adkins |
Wireless |
|
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90 Wireless LAN , 8/6/02, with Marty Adkins |
Wireless |
|
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9 Dial on Demand Routing 1/96 |
Access |
|
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89 New Cisco MPLS Features , 7/9/02 |
MPLS |
|
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88 Cisco PIX Firewalls: IPsec on a PIX, 6/7/02, with Grant Moerschel |
Security, IPSec VPN |
See Grant's company page at http://www.flackjacket.net/ |
|
|
87 Cisco PIX Firewalls: Fixups, Failover, and DHCP , 5/4/02, with Grant Moerschel |
Security |
See Grant's company page at http://www.flackjacket.net/ |
|
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86 Cisco PIX Firewalls: Access Lists and Management , 4/6/02, with Grant Moerschel |
Security |
See Grant's company page at http://www.flackjacket.net/ |
|
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85 Cisco PIX Firewall Basics , 3/4/02, with Grant Moerschel |
Security |
See Grant's company page at http://www.flackjacket.net/ |
|
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84 New Features in Cisco IOS 12.2(4)T 2/4/2002 |
Cisco IOS |
|
|
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83 Mobile Router 12/28/2001 |
IP Addressing and Services, Routing |
|
|
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82 IP Multicast and PIM Rendezvous
Points 12/4/01, updated 1/5/04 |
IP Multicast, Routing |
Minor correction thanks to Scott Morris. |
|
|
81 PIM Sparse Mode 11/2/01 |
IP Multicast, Routing |
|
|
|
80 PIM Dense Mode 10/1/01,
updated 2/16/2004 and 12/17/2004. |
IP Multicast, Routing |
Corrected typo (IGMP) 2/16/2004. Clarified DR portion,
12/17/2004. |
|
|
79 The Protocols of IP Multicast 9/4/01 |
IP Multicast, Routing |
|
|
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78 Configuring QoS in the Campus 8/5/01 |
QoS, Switching |
|
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77 QoS in the Campus 6/29/01,
updated 11/4/2005 |
QoS, Switching |
Left out mention of Mentor Technologies |
|
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76 Lessons Learned: Route Filtering 6/13/01 |
Routing |
Real World Story |
|
|
Certification |
|
||
|
74 NetFlow 5/8/01 |
Cisco IOS, Net Mgmt, NetFlow |
Lightly revised 5/11/01. |
|
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73 Cisco Certifications 3/30/01 |
Certification |
|
|
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72 Secure Management of Routers 3/4/01 |
Security, Net Mgmt |
|
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71 IPsec Simplified — Part 2 2/7/01 |
Security, IPSec VPN |
|
|
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70 IPsec Simplified 1/8/01 |
Security, IPSec VPN |
|
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69 CiscoWorks 2000 Update 11/30/00 |
Net Mgmt |
Includes screen captures! |
|
|
68 Service Assurance Agent (SAA) and the Management Engine 11/8/00 |
Net Mgmt |
|
|
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67 BGP and MPLS-Based VPNs 10/4/00 |
MPLS, Routing |
|
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66 MPLS, Part II 9/4/2000 |
MPLS |
|
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65 Introduction to MPLS 8/7/2000 |
MPLS |
One broken link fixed, 11/6/2001 |
|
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64 Mobility and Mobile IP 7/4/2000. Updated 12/26/2000 |
IP Addressing and Services, Routing |
|
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63 Cisco Secure Integrated Firewall Software 6/1/2000 |
Security |
|
|
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62 Overview of New Features in Cisco IOS 12.1 5/2/2000 |
Cisco IOS |
Revised 8/7/2000: 12.0 became GD with release 12.0(8) (no T). |
|
|
61 New Quality of Service Features in Cisco IOS 12.1 4/5/2000 |
QoS |
|
|
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60 Switched Multimegabit Data Service (SMDS) 3/6/2000, with Alec Bullard |
WAN |
|
|
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59 Service Provider Fundamentals 2/5/2000 |
Service Provider |
|
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58 Switching: Campus Design 1/4/2000 |
Switching |
|
|
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57 Switching: MultiLayer Switching 12/6/99 |
Switching |
|
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56 Switching: CiscoWorks 2000/CWSI 11/2/99 |
Switching, Net Mgmt |
Note (11/5/2001): CWSI is obsolete, replaced by the CiscoWorks 2000 Campus Manager. |
|
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55 Switching: Dynamic VLAN's, VQP, and VMPS 10/10/99 |
Switching |
|
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54 Switching: Trunks and Dynamic Trunking Protocol (DTP) 9/4/99 |
Switching |
|
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53 Switching: VLAN's 8/1/99 |
Switching |
|
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52 Configuring SNMP on Switches, and Syslog 6/24/99 |
Switching, Net Mgmt |
|
|
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51 Configuring SNMP in Cisco Routers 6/6/99 |
Net Mgmt |
|
|
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50 Reflexive Access Lists
5/5/99 |
|
|
|
|
49 Miscellaneous Topics 3/31/99 |
Includes CLI Search, RFC 1573, CiscoWorks 2000 in the Real World, Books. |
||
|
48 CiscoWorks 2000 3/3/99 |
Net Mgmt |
|
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47 Resource Reservation Protocol, RSVP 2/9/99 |
QoS |
|
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46 Quality of Service, Part III 1/2/99 |
QoS |
|
|
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45 Quality of Service, Part II 11/98 |
QoS |
|
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44 QoS Features 10/98 |
QoS |
|
|
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43 OSPF -- Part III 10/98 |
Routing |
See also OSPF Note . |
|
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42 OSPF and Route Summarization 9/98 |
Routing |
Updated (/24 to /16) 9/9/99. |
|
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41 Summarizable Address Blocks 8/98 |
Routing |
Updated (typo fix) 10/23/98. |
|
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40 Introducing OSPF 7/98 |
Routing |
|
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39 Voice and Data, Part II 6/98 |
Voice |
|
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38 BGP Part II 5/98 |
Routing |
|
|
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37 Beginning BGP 4/98 |
Routing |
Fixed private AS range typo, 6/23/2000. |
|
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36 Mixing Voice and Data 3/98 |
Voice |
|
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35 RMON2 and NetScout 2/98 |
Net Mgmt |
|
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34 MPOA: Multi-Protocol Over ATM 1/98 |
ATM |
|
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33 Next Hop Resolution Protocol 12/97 |
IP Addressing and Services, ATM |
|
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32 Wrapping Up DLSw 11/97 |
IBM |
|
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31 Diving Deeper Into DLSw 10/97 |
IBM |
Revised 1/15/01: port lists cannot include Ethernet interfaces. |
|
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30 Diving Into DLSw 9/97 |
IBM |
|
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29 Cisco Tag Switching 8/97 |
MPLS |
|
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IP Addressing & Services, Security |
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27 Dial-Up Access: MMP 6/97 |
Access |
|
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26 Tuning Tunnels 5/97 |
Access |
|
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Access, Routing |
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24 Threshold Manager 3/97 |
Net Mgmt |
Note: Threshold Manager was developed for CiscoView 4 and has not been carried forward to CiscoView 5 (Web CiscoView). 7/24/2001 |
|
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23 Integrated Routing and Bridging 2/97 |
Routing |
|
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22 What's New in Frame Relay 1/97 |
WAN |
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21 Old and New Routing Techniques 12/96 |
Routing |
|
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20 Network Address Translation 11/96 |
IP Addressing & Services, Security |
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19 RMON 10/96 |
Net Mgmt |
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18 Performance Management 9/96 |
Net Mgmt |
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17 Looking Into Lock-and-Key 8/96 |
Access, Security |
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Net Mgmt |
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Net Mgmt |
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Net Mgmt |
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13 Joy of CCIE 4/96 |
Certification |
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Cisco IOS, LAN |
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11 Troubleshooting 3/96 |
Misc |
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10 TACACS+, Part II 2/96 |
Net Mgmt, Security, TACACS+, AAA |
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| 09 Dial on Demand Routing 1/96 | Cisco IOS, Dial |
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08 The TACACS+ System 12/95 |
Net Mgmt, Security, TACACS+, AAA |
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|
Net Mgmt |
Cisco sold Netsys to WANDL, see http://www.wandl.com/ or Click Here for Cisco's page about it. |
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06 The Cisco Router User Interface 10/95 |
Cisco IOS |
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05 Managing Cisco Routers 9/95 |
Net Mgmt |
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04 Frame Relay Design 8/95 |
WAN |
Figure updated 1/99. |
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03 Introduction to Frame Relay 7/95 |
WAN |
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02 Hot Standby Routing Protocol 6/95 |
LAN (L2) |
Additional info, see Notes2 . JPEG images 11/23/98. |
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01 Privilege Levels 5/95 |
Cisco IOS, Net Mgmt |
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Notes
|
n07 Voice3 , 10/17/98 |
Voice |
Addendum on recent Voice Over X capabilities. |
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n06 OSPF Note , 10/17/98 |
Routing |
Small clarification on subnet summarization with OSPF. |
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n05 Notes6 , 9/9/98 |
Access |
Information about dialer methods. |
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N/A |
The former Notes5 (/9/9/98) was incorporated into Configuring for Manageability II -- Best Practices , listed above. |
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n04 Notes4 , Last updated: 9/9/98. |
Access |
Some more information about ISDN dial. |
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n03 Notes3 , 3/19/98 |
Routing |
Some information about IGRP/EIGRP routing metrics. |
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n02 HSRP2 , 4/10/98 |
Cisco IOS, LAN |
Information submitted by a reader on HSRP. |
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n01 Notes1 , 3/19/98 |
Access |
Changes in my thinking, new information, corrections, etc. See also Notes4 , below. |
Other Papers
| p 23 CiscoSecure ACS 4.0 Captures 01 3/11/2006 | AAA, RADIUS, TACACS+, Security, Network Management, 802.1x, NAC | PDF
only. Large file (16 MB)! One of four (4) parts. Replaces the ACS 3.2 captures file |
|
| p 22 CiscoSecure ACS 4.0 Captures 02 3/11/2006 | AAA, RADIUS, TACACS+, Security, Network Management, 802.1x, NAC | PDF
only. Large file (17 MB)! One of four (4) parts. Replaces the ACS 3.2 captures file |
|
| p 21 CiscoSecure ACS 4.0 Captures 03 3/11/2006 | AAA, RADIUS, TACACS+, Security, Network Management, 802.1x, NAC | PDF
only. Large file (17 MB)! One of four (4) parts. Replaces the ACS 3.2 captures file |
|
| p 20 CiscoSecure ACS 4.0 Captures 04 3/11/2006 | AAA, RADIUS, TACACS+, Security,
Network Management,
802.1x, NAC |
PDF
only. Large file (12 MB)! One of four (4) parts. Replaces the ACS 3.2 captures file |
PDF |
| p 19 The Network Monitor article, 3/2004 | Network Management |
Starts on page 5. |
PDF |
| p 18 PDM 3.0 Screen Captures 2/2004 | Security, IPSec VPN |
3 MB |
PDF |
| p 17 SDM 1.1 Screen Captures 2/2004 | Security, IPSec VPN |
3.5 MB |
PDF |
| p16 The Network Monitor article, 1/15/2004 | Network Management |
Updated 1/15/2004 |
PDF |
|
p15 Newsletter: Cisco AutoQoS , 5/5/2003 |
QoS, IP Telephony |
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p14 Call Manager 3.2 Screen Captures Part 4 , 3/3/2003 |
Voice, VoIP, IP Telephony |
PDF only. 1.4 MB. Serviceability Tools. |
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p13 Call Manager 3.2 Screen Captures Part 3 , 3/3/2003 |
Voice, VoIP, IP Telephony |
PDF only. 1.2 MB. User, Application, and Help Menus. |
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p12 Call Manager 3.2 Screen Captures Part 2 , 3/3/2003 |
Voice, VoIP, IP Telephony |
PDF only. 1.5 MB. Feature and Device Menus. |
|
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p11 Call Manager 3.2 Screen Captures Part 1 , 3/3/2003 |
Voice, VoIP, IP Telephony |
PDF only. 2.4 MB. System, Route Plan, and Service Menus. |
|
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p10 Cisco Catalyst Command Comparison Sheet 11/26/2002 |
Switching |
PDF only. It's in landscape mode, so it looks better when printed than when tilting your head to read it! |
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|
Net Mgmt |
Linked now to magazine article (above) replacing former posting. |
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p08 Configuring for Manageability II -- Best Practices 12/98 |
Net Mgmt |
Updated (mildly) 9/5/99. |
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p07 Distributed Director 11/98 |
Content Delivery Networking |
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p06 Local Director 11/98 |
Content Delivery Networking |
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p05 Web Cache Engine 11/98 |
Content Delivery Networking |
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p04 QoS (Quality of Service) Features 11/98 |
QoS |
Updated 2/10/99. |
|
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p03 Network Address Translation 11/98 |
IP Addressing and Services, Security |
|
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p02 BGP Commands 11/98 |
Routing |
|
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p01 Configuring Routers to Manage Them 6/96 |
Net Mgmt |
|
ZIP Archives of the PDF versions of articles.
| Archive of articles 141-160 (Contains the most recent articles, plus the PDF version of the latest index file) |
ZIP | 2 MB | Updated 6/22/2007  |
|
Archive of articles 121-140 |
ZIP |
16 MB |
Updated 10/9/2006 |
|
Archive of articles 101-120 |
ZIP |
11 MB |
Updated 2/1/2005 |
|
Archive of articles 081 - 100 |
20 MB |
Updated 10/29/2003 |
|
|
Archive of articles 041 - 080 |
23 MB |
Updated (mildly) 4/23/2006 |
|
|
Archive of articles 001 - 040 |
21 MB |
Updated 1/6/2003 |
|
| Archive of other notes and
articles Does not
include the (big) ACS
capture documents.
|
ZIP | 21 MB | Updated 2/5/2004 |
I've broken this into separate ZIP files, hoping that most of the time you'll only need the most recent articles ZIP archive.
Dr. Peter J. Welcher (CCIE #1773, CCSI #94014, CCIP) is a Senior Consultant with Chesapeake NetCraftsmen. NetCraftsmen is a high-end consulting firm and Cisco Premier Partner dedicated to quality consulting and knowledge transfer. NetCraftsmen has six CCIE's, with expertise including large network high-availability routing/switching and design, VoIP, QoS, MPLS, network management, security, IP multicast, and other areas. See http://www.netcraftsmen.net for more information about NetCraftsmen. Pete's links start at http://www.netcraftsmen.net/welcher . New articles will be posted under the Articles link. Questions, suggestions for articles, etc. can be sent to pjw <at> netcraftsmen <dot> net.
Update 9/18/2008
Copyright (C) 1999, 2000, 2001, 2002 ,
2003, 2004, 2005, 2006, 2007, 2008 Peter J. Welcher