- Cisco Router Configuration Commands - Lists how to enable and disable interfaces, add IP addresses to interfaces, enable RIP or IGRP and set passwords.
- Cisco Router Show Commands - Handy show commands to check on the status of interfaces.
- Cisco Router Basic Operations - Covers getting into and out of different modes. Also, some handy shortcut keys are included.
- Cisco Router Copy Commands - How to save and backup your router configuration and IOS file.
- Cisco Router Debug Commands - Some useful debug commands.
Cisco Router Configuration Commands
Requirement Cisco Command Set a console password to cisco Router(config)#line con 0
Router(config-line)#login
Router(config-line)#password ciscoSet a telnet password Router(config)#line vty 0 4
Router(config-line)#login
Router(config-line)#password ciscoStop console timing out Router(config)#line con 0
Router(config-line)#exec-timeout 0 0Set the enable password to cisco Router(config)#enable password cisco Set the enable secret password to peter.This password overrides the enable password and is encypted within the config file Router(config)#enable secret peter Enable an interface Router(config-if)#no shutdown To disable an interface Router(config-if)#shutdown Set the clock rate for a router with a DCE cable to 64K Router(config-if)clock rate 64000 Set a logical bandwidth assignment of 64K to the serial interface Router(config-if)bandwidth 64
Note that the zeroes are not missingTo add an IP address to a interface Router(config-if)#ip addr 10.1.1.1 255.255.255.0 To enable RIP on all 172.16.x.y interfaces Router(config)#router rip
Router(config-router)#network 172.16.0.0Disable RIP Router(config)#no router rip To enable IRGP with a AS of 200, to all interfaces Router(config)#router igrp 200
Router(config-router)#network 172.16.0.0Disable IGRP Router(config)#no router igrp 200 Static route the remote network is 172.16.1.0, with a mask of 255.255.255.0, the next hop is 172.16.2.1, at a cost of 5 hops Router(config)#ip route 172.16.1.0 255.255.255.0 172.16.2.1 5 Disable CDP for the whole router Router(config)#no cdp run Enable CDP for he whole router Router(config)#cdp run Disable CDP on an interface Router(config-if)#no cdp enable Cisco Router Show Commands
Requirement Cisco Command View version information show version View current configuration (DRAM) show running-config View startup configuration (NVRAM) show startup-config Show IOS file and flash space show flash Shows all logs that the router has in its memory show log View the interface status of interface e0 show interface e0 Overview all interfaces on the router show ip interfaces brief View type of serial cable on s0 show controllers 0 (note the space between the ’s’ and the ‘0′) Display a summary of connected cdp devices show cdp neighbor Display detailed information on all devices show cdp entry * Display current routing protocols show ip protocols Display IP routing table show ip route Display access lists, this includes the number of displayed matches show access-lists Check the router can see the ISDN switch show isdn status Check a Frame Relay PVC connections show frame-relay pvc show lmi traffic stats show frame-relay lmi Display the frame inverse ARP table show frame-relay map Cisco Router Basic Operations
Requirement Cisco Command Enable Enter privileged mode Return to user mode from privileged disable Exit Router Logout or exit or quit Recall last command up arrow or <Ctrl-P> Recall next command down arrow or <Ctrl-N> Suspend or abort <Shift> and <Ctrl> and 6 then x Refresh screen output <Ctrl-R> Compleat Command TAB
Requirement Cisco Command Save the current configuration from DRAM to NVRAM copy running-config startup-config Merge NVRAM configuration to DRAM copy startup-config running-config Copy DRAM configuration to a TFTP server copy runing-config tftp Merge TFTP configuration with current router configuration held in DRAM copy tftp runing-config Backup the IOS onto a TFTP server copy flash tftp Upgrade the router IOS from a TFTP server copy tftp flash Cisco Router Debug Commands
Requirement Cisco Command Enable debug for RIP debug ip rip Enable summary IGRP debug information debug ip igrp events Enable detailed IGRP debug information debug ip igrp transactions Debug IPX RIP debug ipx routing activity Debug IPX SAP debug IPX SAP Enable debug for CHAP or PAP debug ppp authentication Switch all debugging off no debug allundebug all
This post describes how to set up IP SLA to allow a static route to failover if pings to a specified internet host should fail. This is really useful if you have two ISPs (and thus, two default routes) where the router cannot detect a link failure. This is really common if you have a cable/DSL modem or some type of wireless connectivity. Here’s the basic config, taken directly from Shawn’s Blog:
ip sla 1 < The number 1 here is arbitrary, used only to identify this sla. It is otherwise knows as the operation number>
icmp-echo 4.2.2.2 < 4.2.2.2 is a DNS server that responds to pings out on the internet>
timeout 500 < This is how long to wait for a response from the ping>
frequency 3 < This is the repeat rate for the SLA>
ip sla schedule 1 start-time now life forever < This command says “start SLA 1 now and keep it running forever>
Lo and behold - my GNS3 Lab Dream has been mostly fulfilled! As I was blogging on Network World, one of the readers posted this link:
It’s a massive GNS3 support/lab forum where many people have created lab topologies for existing books/scenarios out on the market! Much less work than creating labs manually (my initial idea). I’ve redirected GNS3Labs.com to this site - great stuff!
Okay…I have to admit…I’m a little bummed this is already out there. It feels a little like I jumped out of my chair saying, “wouldn’t it be great if there was a device that could excite water molecules to cause friction and heat up food?!?!” Ehhh… I’m sure I’ll get over it - I’m really excited to see this site in play!
UPDATE: In surfing through the site, they even have a .NET file for the CCIE topology I created for CBTNuggets! Awesome!
Implement and verify WAN links.
l Describe different methods for connecting to a WAN
l Configure and verify a basic WAN serial connection
l Configure and verify Frame Relay on Cisco routers
l Troubleshoot WAN implementation issues
l Describe VPN technology (including: importance, benefits, role, impact, components)
l Configure and verify a PPP connection between Cisco routers
Describe how a network works.
l Differentiate between LAN/WAN operation and features