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Cisco Forum FAQ
FAQ Revisions
Editors:
skj
,
Covenant
,
aryoba
,
Phraxos
Last modified on 2013-05-13 13:38:05
Table of Contents
10.0 General Questions
(
5
)
20.0 Products and Services
(
10
)
20.1 Smartnet
(
8
)
20.2 IOS Image Management
(
5
)
20.3 Tips and Tricks
(
14
)
20.4 PIX/ASA Image Management
(
2
)
20.5 Switch Image Management
(
3
)
30.0 Technologies
(
19
)
30.1 Quick subnet calculating techniques
(
4
)
30.2 Between Router and Layer-3 Switch
(
5
)
30.3 Switching Technology
(
4
)
30.4 Routing Technology
(
10
)
30.5 IP version 6
(
1
)
40.0 Security
(
12
)
40.1 NAT/VPN/ACL/CBAC/Firewall
(
8
)
40.2 Security Sample Configurations
(
14
)
40.3 Security and VRF lite
(
2
)
40.4 Switch Port Security
(
1
)
50.0 Configuration
(
11
)
50.1 PPPoE/PPPoA/DHCP
(
21
)
50.2 UBR Cable Modem/Router
(
4
)
50.3 Router-Firewall Combo
(
4
)
50.4 Running Servers with Cisco
(
3
)
50.5 Load Balance 2 ISP with Cisco
(
4
)
50.6 Switch Configuration
(
3
)
50.7 QoS and Voice over IP
(
16
)
50.8 Wireless
(
7
)
60.0 Troubleshooting
(
20
)
60.1 Unexplained Phenomenon
(
4
)
70.0 Cisco Learning: CCNA
(
10
)
70.1 Cisco Learning: CCNP
(
1
)
70.2 Cisco Learning: CCIE
(
1
)
80.0 Network Design
(
12
)
80.1 Network Best Practices
(
1
)
90.0 FAQ Wish List (desired FAQs)
10.0 General Questions
What is the purpose of this forum?
How This Forum Works
How this FAQ works
How do I post in the forum?
How can I add to this FAQ?
20.0 Products and Services
Why Cisco? Does the buying price justify?
Choosing Cisco equipment as Internet gateway and learning tool
Which Cisco solution is right for my situation?
Cisco Equipment Performance (per pps and Mbps)
Cisco Buying and Configuration Tips for Average Joe
WIC-1ADSL and HWIC-1ADSL compatibility and performance
What is a good router logging software package?
Cisco equipment memory chip specification
Where can I find Field notices to confirm to during troubleshooting?
Which Cisco IOS version and/or device that offer specific features/technology?
20.1 Smartnet
Does Cisco provide any support for non-registered customers?
How/where do I get Cisco images (such as IOS, PIX/ASA OS)?
What is Smartnet? Do I need one?
Where can I purchase a SMARTNet contract or cheap Cisco product?
What does the Cisco EULA say?
Where are the Cisco SMARTnet Terms and Conditions
What to expect from Cisco new product lines
Unified Communication Licensing
20.2 IOS Image Management
How to prepare TFTP server
How do I upgrade a Cisco router IOS image or to backup to my computer?
Deleted/Corrupted/Wrong Type/No IOS image and router won't boot
How do I copy a 2600 IOS image to 16MB flash when the router says it won't fit?
Troubleshooting Compact Flash card
20.3 Tips and Tricks
Cisco CLI Handy Keys
How do I remove a flash partition?
Configure Cisco networking devices w/o knowledge of Cisco IOS® software
Why should I remove the password 7 hash from my config before posting?
Cisco router ROMMON commands
I do not have a console cable! What can I do?
What is the pin out for a T1 crossover cable?
Unreadable output from Cisco Router Console
Make Cisco router/switch fan noise softer
GBIC types and interconnectivity
Cisco Catalyst switch Static MAC address behaviors
TCP Optimizing factors to maximize traffic flow
EEM and TCL scripting
Jumbo Frame and MTU
20.4 PIX/ASA Image Management
PIX 520 Boothelper / PIX 520 Password Recovery
Lost/Corrupted PIX Image, Boot from Monitor Prompt
20.5 Switch Image Management
How do I upgrade an IOS tar file on a 2950 Catalyst switch?
Deleted/Corrupted/Wrong Type/No image and switch won't boot
Catalyst OS (Cat OS) Management
30.0 Technologies
Things to expect when setup network for home or small business
Technical Aspects in xDSL/Cable Internet connection
Between DHCP, PPP, Dynamic, and Static IP Address
Setting Up Private Site-To-Site Connections
Basic Cisco Commands and Descriptions
What are the various show commands?
What features does my IOS support?
How can I find out how far I am from the CO.
Circuit Commission and Troubleshooting
How your ISP annouce your subnet via BGP to the Internet: BGP Looking Glass
Understanding PIX Firewall/ASA
Setting Up Wireless LAN
VPN Concentrator 3000 series - Various Info
Automatic Network Health Monitoring and Reporting System: An Introduction
WAN Acceleration
Network Management Software
Between Catalyst 6500, Catalyst 6500E, and Nexus platforms
Nexus 5000 and 2000 switches: What's new with NX-OS
New Platform: Routers, Switches
30.1 Quick subnet calculating techniques
Quick and Easy Subnetting on Routing, Switching and Network Design Relationship
Quick and Easy Subnetting /24 and larger network
Quick and Easy Wildcard (Inverse) Subnet Mask
ACLs and wildcard mask syntax
30.2 Between Router and Layer-3 Switch
Routing and Switching - An Introduction
What is the difference between a Layer-3 switch and a router?
Should I use Layer-3 switch or router?
Layer-3 Switch recommendation
Various Network Design using Routers, Layer-3 Switches, and more
30.3 Switching Technology
How A Layer-2 LAN Communication Works
Spanning Tree Protocols: An Overview
BPDU, Access port, Trunk port, and Port Channel
Jumbo Frames
30.4 Routing Technology
How A Layer-3 Network Communication Works
Choosing Gateway IP Address for a network
What is the difference between the different gateways in the routing table?
Static Routing
RIP: An Introduction
EIGRP: An Introduction
OSPF: An Introduction
BGP: An Introduction
Multicast - Introduction and Sample Configurations
DHCP Broadcast
30.5 IP version 6
General Info and Introduction
40.0 Security
How do I secure a Cisco router from the Internet?
Protect my network! How do I do that using Cisco IOS?
Secure and Monitor Network Access with AAA (TACACS/RADIUS) and Privilege Level
Are there Free TACACS+ or RADIUS authentication software to secure my router?
Securing access to routers with AAA commands
Securing access to switches with AAA commands
Securing access to ASA/PIX Firewall with AAA commands
Between GRE/IPSEC and IPSEC VPN tunnels
Securely remote connect to router, firewall, or any device over any network
WCCP with Router/MSFC and Blue Coat ProxySG
Cisco Ironport as Anti Virus, Anti Spam, and Secure Email
SSL Certificates
40.1 NAT/VPN/ACL/CBAC/Firewall
NAT, PAT, Port Forward, Internet and Server Access: Introduction and Practices
Generic NAT configuration (RFC 1631)
Minimum and Maximum NAT Timeouts
How do I NAT a TCP port range without entering a seperate NAT for each port?
How can I insert a line into an existing ACL or modify existing ACL in general?
Working with invalid network design or poor network implementation
Policy NAT
Considerations of using non-RFC-1918 IP address for internal network
40.2 Security Sample Configurations
Basic Internet Firewall for Routers without IOS image Firewall feature
Configure DMZ on routers
Sample IOS Firewall (CBAC) router configuration
Sample Configuration of ACL-CBAC-IDS/IPS-IPSec VPN on router
Zone-Based Firewall Sample Configuration
Internet access restriction without a proxy server/websense solution?
Restrict Traffic Flow including P2P (Peer to Peer) using NBAR: An Overview
Various Site-to-Site IPSec VPN: Cisco, Juniper, Checkpoint, Sonicwall, Zywall
How do I configure a Zywall/PIX IPSec VPN
Private Routing over VPN: NAT/PAT, GRE, IPSec Sample Configurations
Configure router and ASA/PIX Firewall to support various VPN technologies
Configure router as both Internet router and VPN Concentrator
Configure PIX/ASA as both Internet Firewall and VPN Concentrator
Configuring Juniper SRX as Internet Firewall and IPSec VPN Concentrator
40.3 Security and VRF lite
Multiple networks share same Internet lines or same devices transparently
VRF-aware IPSec VPN tunnel
40.4 Switch Port Security
Design and Configure Port Security
50.0 Configuration
The best way to configure Cisco equipments
Is there a graphical interface for configuration and where do I get it?
The most straight-forward way to configure Cisco router: Introduction to CLI
2500 Series Installation and Configuration Guide
Where can I find documentation for configuring my Cisco 67x series DSL Router
Dynamic DNS (DDNS) Sample Configuration and Discussions
Straight-forward way to configure Cisco PIX Firewall/ASA: Introduction to CLI
Basic Configuration of Cisco devices
Configuring ASA/PIX Firewall to support Riverbed Steelhead passthrough
Setting Up DHCP server for LAN in Cisco network
Basic Idea of setting Internet connectivity for IP network
50.1 PPPoE/PPPoA/DHCP
Be Broadband / O2 Config for ADSL2+ (992.3 Annex A)
Sample Configuration on Real Network
Configure router as DHCP client using external modem
Configure router with integrated ADSL modem as DHCP client
Configure ASA/PIX Firewall as DHCP client using external modem
Quick Guide of Configuring Cisco router for PPPoE using external modem
Walkthrough of Configuring Cisco Routers for ADSL PPPoE using external modem
678 ADSL External Modem/Router
678 on MSN DSL
Configuring router with integrated ADSL modem running PPPoE
Configure ASA/PIX Firewall as PPPoE client using external modem
ADSL router configuration for PPPoA/PPPoE with NAT
ADSL Router Sample Configuration running GRE
Configuring router with integrated ADSL modem running PPPoA
Generic PPPoA configuration w/ dynamic address
Generic PPPoA/PPPoE/RFC1483 Bridging/RFC1483 Routing Guide
Generic PPPoE configuration
How can I configure broadband router with cable/dsl using static IP address
Configure ASA/PIX Firewall using static IP address from ISP
Setting Up Network With ISP WAN and Public IP Block subnets running NAT
Integrated VDSL modem/router Sample Configuration
50.2 UBR Cable Modem/Router
UBR9xx Cable Router Default Configuration
uBR9xx - Can I reset the MAC address?
uBR924 configuration
uBR925 configuration
50.3 Router-Firewall Combo
Setting Up Network With Router and Firewall
Internet - Router - PIX/ASA - LAN
Internet - PIX/ASA - Router - LAN
Separate ISP: One is for Internet and one is for VPN
50.4 Running Servers with Cisco
Router configuration to run server (with and without port forwarding)
PIX Firewall/ASA configuration to run server (with and without port forwarding)
Separate Internet: Dedicate T1/E1 for server, dedicate DSL/Cable for LAN
50.5 Load Balance 2 ISP with Cisco
Dedicate one ISP between two by the destination TCP/UDP port number
OER on Routers (without BGP; just static routes)
IP SLA Load Balance - Sample Configuration and Workaround
Redundant Link Graceful Internet Load Balance/Failover
50.6 Switch Configuration
Switch and VLAN Management Best Practice
Etherchannel
Sample Configuration: Nexus 5000 and Nexus 2000 with FEX
50.7 QoS and Voice over IP
Deploying VoIP - An Introduction
Introduction to Voice over IP
Working with Voice over IP protocols
QoS Basic and Implementation
How do I configure QoS for VoIP?
Improving Performance of Cable/DSL Internet using QoS
Router runs VoIP, Bit Torrent, Online Gaming; DynDNS - QoS Sample Configuration
Cisco References
Hold Queue interface value to speed things up
Troubleshooting QoS
Call Manager Express (CME) Sample Configuration
sep(mac-address).cnf.xml for Cisco 79xx phones running SIP
CRS Scripting
Various Voice Gateway Router Sample Configurations
MGCP (Media Gateway Control Protocol) Configuration Guide
Telepresence: An Introduction
50.8 Wireless
Considerations in building a Wireless network
Wireless Router Sample Configuration
Various sample configuration using Wireless as backbone network
Creating multiple wireless networks: configuring AP to trunk to switch
Upgrading the CISCO AIRONET MODEL AIR-AP-1220B-x-K9 VXWorks OS to IOS
Cisco AP with authentication server
Manage Wireless LAN Controller
60.0 Troubleshooting
Corrupt image & router boots into rommon mode
Switch does not boot properly
Router Various Hardware Issues and Solutions
PIX Firewall Various Hardware Issues and Solutions
Switch Various Hardware Issues and Solutions
Config Register Value - router lost configuration
Used wrong config-register and now the router does not boot!
Password Recovery Procedures - proper BREAK key sending
Unreadable console output
PPPoE: Problems with resolving DNS and general connectivity. Its your MTU!
The Cisco Router Web Interface (= CRWS) hangs when I try to start it
My SDM/CRWS (web configuration mode) doen't work. How do I revive it?
KVM Switch: My router boots fine, but then doesn't respond.
IPSec VPN and Microsoft - Remote user receives IP address, unable to map drives
Server Load Balancing
Getting around Layer-1/2 line error troubleshooting
Basic Troubleshooting for Speed Issues with Cisco Equipment
Slow connection through a router, firewall, or switch
Checking traffic activities against ACL
Cisco links to interpret error messages, bug finding, and command lookups
60.1 Unexplained Phenomenon
Frame Relay
Router IOS image performance and reliability
Application vs. Network Hardware Issue
IOS/Firmware Issue
70.0 Cisco Learning: CCNA
Preparing for exam and for real world
Where can I find useful Cisco links, other than official Cisco website?
Where can I get books about Cisco products and technologies?
Where is the Cisco Univercd documentation?
Good Cisco equipment for CCNA Learning
What to expect when using a 2514 as a broadband router or Cisco learning tool.
Equipments and books needed for CCNA preparations
Accessing Lab from Network
Questions around CCNA Exam taking
CCNA Studies
70.1 Cisco Learning: CCNP
CCNP Routing and Switching
70.2 Cisco Learning: CCIE
CCIE Lab Exam Preparations
80.0 Network Design
Improving Small Business network performance
Network Design Tips
Running Out Of IP Addresses due to 'flat network' design
Tips in Designing Network on Hub-and-Spoke, Full-Mesh, or Partially-Mesh setup
Tips in connecting hosts to switches
Resilient Network Tips for Small Businesses
BGP Design
Migrating network
MPLS and VRF
EIGRP Tips and Tricks
Public Internet Datacenter Design
Building Data Center for Small and Medium businesses
80.1 Network Best Practices
Change Management - ITIL
90.0 FAQ Wish List (desired FAQs)
login
and you can contribute to the FAQ
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