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CCNA - CommandGuide

Question	Answer
Class A address leading bit pattern/1st octet/notes	0xxxxxxx/0-127/ 0 is invalid
Class B address leading bit pattern/1st octet/notes	10xxxxxx/128-191/
Class C address leading bit pattern/1st octet/notes	110xxxxx/192-223/
Class D address leading bit pattern/1st octet/notes	1110xxxx/224-239/Reserved for multicasting
Class E address leading bit pattern/1st octet/notes	1111xxxx/240-255/Reserved for future use or testing.
Use subnets with all zeroes or ones.	Router(config)# ip subnet-zero
Requirements for route summarization.	1) Routers need to be running a classless routing protocol
If Ethernet LAN port or connection what's the port type	what's it connected to
If T1/E1 WAN port or connection what's the port type	what's it connected to
If Console what's the port type	what's it connected to
If Aux what's the port type	what's it connected to
If BRI S/T what's the port type	what's it connected to
If BRI U WAN what's the port type	what's it connected to
To cable computer COM port to console of router/switch	Use rollover cable
To cable computer NIC to switch/hub	Use straight-through cable
To cable computer NIC to computer NIC	Use crossover cable
To cable switch or hub port to router's Ethernet port	Use straight-through cable.
To cable switch or hub port to switch or hub port	Use crossover cable (check for uplink button or toggle switch to defeat this)
To cable router's Ethernet port to router's Ethernet port	Use crossover cable
To cable computer NIC to router's Ethernet port	Use crossover cable
To cable router's serial port to router's serial port	Use Cisco serial DCE/DTE cables
List all commands available in the current command mode	Router#?
List all the possible command choices that start with c	Router#c?
What tells you that there are more parameters that need to be entered	% Incomplete Command
Show all subcommands for a command.	Router#command ?
No error message or 'Incomplete Command' message means the command was entered -	successfully Router#
Move user from user mode to privileged mode in router or switch	Router>enable Router# or switch>enable switch#
Log a user off from privileged (router) or user mode (router and switch)	Router#exit or Router>exit or switch>exit
To move back one level	Router(config-if)#exit Router (config)# or Router(config)#exit Router#
To move from privileged mode back to user mode in router or switch	Router#disable Router> or switch#disable
Alternative to 'exit' command	Router#logout
To enter startup mode from the command line if no startup config present.	Router#setup
Move cursor to beginning of line	Ctrl A
Move cursor back one word	Esc b
Move cursor back one character	Ctrl b (or <- )
Move cursor to end of line	Ctrl e
Move cursor forward one character	Ctrl f (or -> )
Move cursor forward one word	Esc f
Move from any prompt back down to privileged mode	Ctrl z
What indicates that the line has been scrolled to the left	$
Turn off the ability to use keyboard shortcuts	Router#terminal no editing
Re-enable enhanced editing mode to use keyboard shortcuts	Router#terminal editing
Recall commands in the history buffer in a backward sequence	beginning with the most recent command
Return to more recent commands in the history buffer after recalling commands with ctrl p key sequence	Ctrl n (or down arrow)
Set the number of commands in the buffer that can recalled by the router (maximum number is 256)	Router#terminal history size number or Router#history size number
Display information about currently loaded IOS including configuration register (router) or software and hardware (switch)	Router# show version or switch# show version
Display information about flash memory	Router#show flash
List all commands used at this edit level in the history buffer.	Router#show history
Indication of user mode	Router> Limited viewing of config cannot make changes in this mode.
Indicator of privileged mode	Router# Can see config and move to make changes
Indicator of global configuration mode	Router(config)#
Indicator of interface mode	Router(config-if)#
Indicator of subinterface mode	Router(config-subif)#
Indicator of line mode	Router(config-line)#
Indicator of router configuration mode	Router(config-router)#
Move to global config mode.	Router#config terminal
Configure a router or switch name. Includes 1900 series switches.	Router(config)# hostname shem or (config)#hostname shem
Set enable password on router or switch (2900/2950).	Router(config)# enable password shem or 2900Switch(config)# enable password shem
Set enable secret password on router or switch	Router(config)# enable secret shem
Enter console-line mode on router or switch (2900/2950)	Router(config)#line con 0 or 2900Switch(config)# line con 0
Set console-line mode password to shem on switch or router (2900/2950)	Router(config-line)# password shem or 2900Switch(config-line)# password shem
Enable password checking at login for router or switch (2900/2950)	Router(config-line)# login or 2900Switch(config-line)# login
Enter vty line mode for all five vty lines on router or switch	Router(config)# line vty 0 4
Set vty password to shem	Router(config-line)# password shem
Enter auxiliary line mode	Router(config)# line aux 0
Apply a weak encryption to passwords (from time of entry onwards)	Router(config)# service password-encryption
Display statistics for all interfaces (router) or interface configuration and status of line: up/up	up/down
Display statistics for a specific interface	Router# show interface type number
Display a summary of all interfaces	including status and IP address assigned
Display statistics for interface hardware. Statistics display the clock rate if set and if the cable is DCE	DTE
Display time set on device	Router# show clock
Display local host-to-IP address cache. These are the names and addresses of hosts on the network to which you can connect	Router# show hosts
Display all users connected to device	Router# show users
Display the ARP table	Router# show arp
Display status of configured Layer 3 protocols	Router# show protocols
Display configuration saved in NVRAM.	Router# show startup-config or switch# show start
Display configuration currently in RAM (router) or DRAM (switch)	Router# show running-config [pre 12.0] more system:running-config [12.x] or switch# show running-config
Move to interface Serial x/y mode	Router(config)# int sx/y
Define optional locally significant descriptor of the link (routers and switches).	Router(config-if) #description Blah blah
Assign address and subnet mask to serial interface	Router(config-if)# ip address a.a.a.a m.m.m.m
Assign a clock rate for the serial interface (DCE only)	Router(config-if)# clock rate rrrrr
Turn interface on	Router(config-if)# no shut
Move to FAst ethernet x/y interface mode	Router(config)# int fax/y
Create a MOTD banner.	Router(config)# banner motd # Blah blah# Where the non-initial # is a delimiter
Set the time zone for display purposes based on CUT.	Router(config)# clock timezone thezone disp
Assign a locally significant host name to an IP address.	Router(config)# ip host shem a.a.a.a
Turn off trying to automatically resolve an unrecognized command to a local host name if one is not going to set up DNS.	Router(config)# no ip domain-lookup
Turn on synchronous logging. Information items sent to console will not interrupt the command one types. The command will be moved to a new line	Router(config-line)# logging synchronous (The informational line does not get inserted into the middle of the command one was trying to type. If one were to continue typing
Set time limit when console automatically logs off.	Router(config-line)# exec-timeout m s (Don't use 0 0 in production as it means no timeout.)
Save the running-config from DRAM to local NVRAM Router will execute commands in order they were entered on next reload	Router# copy run start [pre 12.0] copy system:running-config nvram:startup-config [12.x] (Doesn't exist for 1900 series switch)
Save the running-config remotely to TFTP server	Router# copy run tftp [pre 12.0] copy system:running-config tftp: [12.x] Will have to reply IP address of TFTP server & dest file name.
Delete the startup-config file from NVRAM without affecting dynamic memory.	Router# erase start [pre 12.0] erase nvram: [12.x] (Reload the router to clear the running-config.)
Default routing in static case using next-hop address	Router(config)# ip route 0.0.0.0 0.0.0.0 a.a.a.a
Default routing in static case specifying exit interface	Router(config)#ip route 0.0.0.0 0.0.0.0 typeport
Display contents of IP routing table	Router# show ip route (The codes to the left of the routes in the table tell you from where the router learned the routes. A static route is described by the letter S.)
Instruct IOS to forward packets destined for an unknown subnet to the best supernet route. A supernet route covers a range of subnets with a single entry. Cmd used in RIP.	Router(config)# ip classless
Enable RIP (v1 or v2) as a routing protocol from this mode.	Router(config)# router rip
Specify the network number of the directly connected network you want to advertise. In RIP-1	RIP-2
RIP updates will not be sent out an interface	Router(config-router)# passive-interface typeport
Define a specific neighbor with which to exchange information	Router(config-router)# neighbor a.b.c.d
Turn off split horizon (on by default)	Router(config-router)# no ip split-horizon
Change timers in RIP in seconds except where specified.	Router(config-router# timers basic upd inv holddwn flush sleep(ms)
Limit the number of paths for load balancing to x	Router(config-router)# maximum-paths x (4 = default
Generate a default route into RIP.	Router(config-router)# default-information originate
RIP will now send and receive RIP-2 packets globally as v1 is default	Router(config-router)# version 2
Make interface send only RIP-1 packets	Router(config-if)# ip rip send version 1
Make interface send only RIP-2 packets	Router(config-if)# ip rip send version 2
Make interface send both RIP-1 and RIP-2 packets	Router(config-if)# ip rip send version 1 2
Make interface receive only RIP-1 packets	Router(config-if)# ip rip receive version 1
Make interface receive only RIP-2 packets	Router(config-if)# ip rip receive version 2
Make interface receive both RIP-1 and RIP-2 packets	Router(config-if)# ip rip receive version 1 2
Display all RIP activity in real time	Router# debug ip rip
Display contents of the RIP database	Router# show ip rip database
Change back to RIP-1	Router(config-router)# no version 2
Change RIP routing to RIP-1 from router-config mode.	Router(config-router)# version 1
Turn off RIP-2's summarization of networks at the classful boundary.	Router(config-router)# no auto-summary
Re-enable RIP-2's summarization of networks at the classful boundary.	Router(config-router)# auto-summary
Enable IGRP routing process. No longer supported by Cisco as of Cisco IOS Software Release 12.3. If one uses Cisco IOS 12.3 or newer code	one must use either Enhanced IGRP (EIGRP) or one of the other standards-RIP-1
Disable the IGRP routing process	Router(config)# no router igrp as-number
Remove network w.x.y.z from the IGRP routing process.	Router(config-router)# no network w.x.y.z
Set the bandwidth of this interface to x kilobits to allow IGRP to make a better routing decision	Router(config-if)# bandwidth x
Allow IGRP to accept unequal-cost routes	Router(config-router)# variance x
Show all IGRP events in real time.	Router# debug ip igrp events
Show IGRP updates between routers	Router# debug ip igrp transactions
Turn on the EIGRP process All routers in the same AS must use the same AS number	Router(config)# router eigrp as-number (1 - 65535)
Specify which network to advertise in EIGRP	Router(config-router)# network w.x.y.z
Log any changes to an EIGRP neighbor adjacency. Recommended for debugging.	Router(config-router)# eigrp log-neighbor-changes
Turn off the auto-summarization feature in EIGRP. Networks are summarized at the classful boundary by default in EIGRP.	Router(config-router)# no auto-summary
Enable manual summarization on this specific EIGRP interface for the given address and mask. Recommended practice is that one turns off automatic summarization	use the ip summary-address command
Display an EIGRP neighbor table	Router# show ip eigrp neighbors
Display a detailed EIGRP neighbor table	Router# show ip eigrp neighbors detail
Display EIGRP information for each interface	Router# show ip eigrp interfaces
Display EIGRP information for a specific interface	Router# show ip eigrp int type port
Display EIGRP information for interfaces running a specific process	Router# show ip eigrp int processnumb
Display the EIGRP topology table which will display where feasible successors are.	Router# show ip eigrp topology
Display the number and type of packets sent and received in EIGRP.	Router# show ip eigrp traffic
Display events/actions related to the DUAL FSM in EIGRP.	Router# debug eigrp fsm
Display events/actions related to EIGRP packets	Router# debug eigrp packet
Display events/actions related to EIGRP neighbors	Router# debug eigrp neighbor
Advertise OSPF interface using the wildcard mask to determine which interfaces to advertise as being in which area.	Router(config-router)# network w.x.y.z m.m.m.m area n
Turn on specified OSPF process number. The process ID is any value between 1-65535. The process ID is not related to the OSPF area. Unlike IGRP or EIGRP	matching this number across all routers does not ensure network adjacencies will form.
A 0 (zero) in a wildcard mask means	Check the corresponding bit in the address for an exact match.
A 1 (one) in a wildcard mask means	Ignore the corresponding bit in the address. It can be either 1 or 0.
Any OSPF interface with an exact address of 172.16.10.1 is to be put into area 0.	Router(config-router)# network 172.16.10.1 0.0.0.0 area 0
Any OSPF interface with an address of 172.16.x.x is to be put into area 0.	Router(config-router)# network 172.16.10.0 0.0.255.255 area 0
Any OSPF interface with any address is to be put into Area 0	Router(config-router)# network 0.0.0.0 255.255.255.255 area 0
Move to virtual interface Loopback 0. Loopback interfaces are always "up and up" and do not go down unless manually shut down. This makes Loopback interfaces great for using as an OSPF router ID.	Router(config)# interface lo0
Change OSPF interface priority to nn. A priority of 0 guarantees that the router never wins a designated router (DR) election	and 255 guarantees a tie in the election (tie broken by highest router ID).
Change the bandwidth in OSPF to recalculate the cost of the link.	Router(config-if)# bandwidth nnn
Change the OSPF cost metric to a value of nnnn. Cost = refbw/intbw	Router(config-if)# ip ospf cost nnnn
Turns on simple OSPF authentication. Password sent in clear text.	Router(config-router)# area nn authentication
Set OSPF key (password) to whatever	Router(config-if)# ip ospf authentication-key whatever
Enables OSPF authentication for specified area with MD5 password encryption	Router(config-router)# area nn authentication message-digest
Enable OSPF MD5 algorithm authentication for a particular key-id and key (password) which must be same as neighboring router.	Router(config-if)# ip ospf message-digest-key key-id md5 key
Change OSPF 'Hello' interval timer to n seconds. Must match for router to be neighbor.	Router(config-if)# ip ospf hello-interval timer n
Change OSPF 'dead' interval timer to nn seconds. Must match for routers to be neighbors.	Router(config-if)# ip ospf dead-interval nn
Create a default route in OSPF.	Router(config)# ip route 0.0.0.0 0.0.0.0 int
Set the default route to be propagated to all OSPF routers	Router(config-router)# default-information-originate
Display basic OSPF information	Router# show ip ospf
Display OSPF information as it relates to all interfaces	Router# show ip ospf interface
Display OSPF information for specified interface.	Router#show ip ospf inttype intno
List all OSPF neighbors and their states	Router# show ip ospf neighbor
Display a detailed list of OSPF neighbors	Router# show ip ospf neighbor detail
Display contents of OSPF database	Router# show ip ospf database
Clear entire routing table	forcing it to rebuild
Clear specific route to network a.b.c.d	Router# clear ip route a.b.c.d
Reset OSPF counters	Router# clear ip ospf counters
Reset entire OSPF process forcing OSPF to re-create neighbors	database
Display all OSPF events	Router# debug ip ospf events
Display various OSPF states and DR and BDR election between adjacent routers	Router# debug ip ospf adj
Display OPSF packets	Router# debug ip ospf packets
Display information on flash memory (for the 2900/2950 series only)	switch# show flash:
Display current switch MAC address forwarding table	switch# show mac-address-table
Display information about switch Ethernet controller	switch# show controllers ethernet-controller
Display whether the switch passed POST	switch# show post
Display the current VLAN configuration	switch# show vlan
Display setting of virtual interface VLAN 1	the default VLAN on the switch
Remove VLAN Trunking Protocol (VTP) information from 1900 series switch.	1900switch# delete vtp
Reset 1900 series switch back to factory defaults	1900switch# delete nvram
Restart a 1900 series switch	1900switch# reload
Set the 1900 series user mode password to shem.	1900Switch(config)# enable password level 1 shem
Set the 1900 series enable mode password to shem	1900Switch(config)# enable password level 15 shem
Set the 1900/2900/2950 series enable secret password to shem.	1900Switch(config)# enable secret shem or 2900Switch(config)# enable secret shem
Set 1900 series switch IP address and mask to allow for remote access	1900Switch(config)# ip address w.x.y.z m.m.m.m
Set the 1900 series switch default gateway address to allow IP information an exit past the local network	1900Switch(config)# ip default-gateway w.x.y.x
Force full-duplex operation on 1900/2900/2950 switches	Switch(config-if)# duplex full
Enable auto-duplex config on 1900/2900/2950 switches	Switch(config-if)# duplex auto
Force half-duplex operation on 1900/2900/2950	Switch(config-if)# duplex half
Force 10-Mbps operation on 2900/2950 switch	2900Switch(config-if)# speed 10
Force 100-Mbps operation on 2900/2950 switches	2900Switch(config-if)# speed 100
Enable auto-speed configuration on 2900/2950 switches	2900Switch(config-if)# speed auto
Turn on HTTP service with 1900/2900/2950	X900Switch(config)# ip http server
Set port number for HTTP on 1900/2900/2950 switches. This port should be turned off for security reasons unless it is being used	X900Switch(config)# ip http port 80
Display current MAC address forwarding table on 1900/2900/2950 switches	switch# show mac-address-table
Delete all entries from current MAC address forwarding table 1900/2900/2950 switches	switch# clear mac-address-table
Delete only dynamic entries from MAC address table of 1900/2900/2950 switches	switch# clear mac-address-table dynamic
Set a permanent address of aaaa.aaaa.aaaa in the MAC address table for an interface in a 1900 switch	1900Switch(config)# mac-address-table permanent aaaa.aaaa.aaaa typeportnumb
Delete all permanent entries in a 1900 switch MAC address table.	1900Switch# clear mac-address-table perm
Make a 1900 switch interface secure	1900Switch(config-if)# port secure
Allow only nn MAC addresses in the MAC table for this interface on a 1900 switch	1900Switch(config-if)# port secure max-mac-count nn
Display the MAC address table with security information of a 1900 switch	1900Switch# show mac-address-table security
Display the spanning-tree table of the switch (Cisco IOS 12.1 and later)	Switch# show spanning-tree
Display spanning-tree info for port type portno	2950# show spanning-tree int type portno
Display spanning tree info for a specific VLAN	2950# show spanning-tree vlan x
Display all informational messages about changes in the spanning tree topology	2950# debug spanning-tree {all}
Change Spanning-Tree Priority of a Switch. In Cisco IOS 12.1 where nn can be from 1-65535. Lower number means better chance of being elected the root bridge. The default is 32768.	Switch(config)#spanning-tree vlan 1 priority nn
Change this switch to the root switch for VLAN x by lowering its priority to either 24576 or 100 less than current root bridge	whichever number is lower
Configure EtherChannel where x is the number of the channel-group and must match the other interface	Switch(config-if)# channel-group x mode on
Display detailed EtherChannel information	Switch# show etherchannel x detail
Display EtherChannel port information	Switch# show etherchannel x port
Display EtherChannel port-channel information	Switch# show etherchannel x port-channel
Display a one-line summary per channel-group in EtherChannel environment	Switch# show etherchannel x summary
Display 1900 series VLAN information	1900Switch# show vlan
Display which ports belong to which VLAN on a 1900 switch	1900Switch# show vlan-membership
Display information about VLAN n only on a 1900 switch	1900Switch# show vlan 2
Create and name static VLAN nn on 1900 switch	1900Switch(config)# vlan n name shem
Assign 1900 switch port to VLAN n	1900Switch(config-if)# vlan static n
Assigning 2950 Switch Ports Using the range Command	2950Switch(config)# int range type crd/port/m - n Note space surrounding hyphen
Set all 2950 ports to access mode	2950Switch(config-if-range)# switchport mode access
Assign all 2950 ports to VLAN nn	2950Switch(config-if-range)# switchport access vlan 10
Delete all VLAN information from the 1900 series switch and reset VTP parameters to the factory defaults	1900Switch# delete vtp
Remove interface from 1900 series VLAN nn and puts it back into default VLAN 1	1900Switch(config-if)# no vlan static nn
Remove only VLAN nn from 1900 series switch database	1900Switch(config)# no vlan nn name shem
Display the complete VLAN database	2900Switch# show vlan
Display a summary of the VLAN database	2900Switch# show vlan brief
Display a summary of each switch interface	including speed and duplex settings
Display information about VLAN packets a switch has received but is not capable of supporting	2900Switch# debug sw-vlan packets
Turn trunking mode on in 1900 switch	1900Switch(config-if)# trunk on
Turn port to trunking mode on 2900 series switch	2900Switch(config-if)# switchport mode trunk
Set encapsulation type to Dot1Q on 2900 series switch. This is the default encapsulation type	2900Switch(config-if)# switchport trunk encapsulation dot1q
Display trunking information about port 0/26 on 1900 series switch	1900Switch# show trunk A
Change the 1900 series switch to VTP client mode	1900Switch(config)# vtp client
Changes the 1900 series switch to default VTP server mode	1900Switch(config)# vtp server
Change the 1900 series switch to VTP transparent mode	1900Switch(config)# vtp transparent
Set the name of the 1900 series switch VTP management domain to shem	1900Switch(config)# vtp domain shem
Set the VTP password to shem	1900Switch(config)# vtp password shem
Display all 1900 series VTP information	1900Switch# show vtp
Load IOS with image-name. If entered first it is the first place the router will go to look for the IOS.	Router(config)# boot system flash image-name
Load IOS with image-name from a TFTP server. Enter first if you want to go to a TFTP server first.	Router(config)# boot system tftp image-name w.x.y.z
Load IOS from ROM	Router(config)# boot system rom
Copies configuration file from TFTP server to DRAM	Router# copy tftp run [pre 12.0] Router# copy tftp: system:running-config [12.x] Will have to supply IP address of TFTP server and file name to be retrieved.
Backing Up IOS to TFTP Server	Router# copy flash tftp 2900Switch# copy flash:filename tftp Will have to supply name of IOS image and address of TFTP server and dest file name.
Restoring/Upgrading IOS from TFTP Server	Router# copy tftp flash Will have to supply addr or name of remote host
Firmware Upgrade of Catalyst 2950 Series Switch	2950Switch#archive tar /x tftp://w.x.y.x/filename.tar flash:
Make switch now boot to this IOS	2950Switch(config)# boot system flash filename.bin
Changes the router configuration register to nnnn	router(config)# config-register 0xnnnn
Password Recovery Procedures for Cisco Routers	1: Boot the router and interrupt the boot sequence as soon as text appears on the screen. 2: Change the configuration register to ignore contents of NVRAM (0x2142). 3: Reload the router. 4: Enter privileged mode. (Do not enter setup mode.) 5: Copy startup
Password Recovery for 2900/2950 Series Switches	1. Unplug the power supply from the back of the switch 2. Press and hold the Mode button on the front of the switch 3. Plug the switch back in 4. a) For the 2900 series switch Wait until the LED above port 1X goes out
Display global CDP information (such as timers)	Router# show cdp
Display information about neighbors	Router# show cdp neighbors
Display more detail about neighbor device	Router# show cdp neighbors detail
Display information about device named shem	Router# show cdp entry shem
Display information about all devices	Router# show cdp entry *
Display info about interfaces that have CDP running	Router# show cdp interface
Display info about specific interface x running CDP	Router# show cdp interface x
Display traffic info-packets in/out/version	Router# show cdp traffic
Change length of time to keep CDP packets	Router(config)# cdp holdtime x
Change how often CDP updates are sent	Router(config)# cdp timer x
Enable CDP globally (on by default)	Router(config)# cdp run
Turn off CDP globally	Router(config)# no cdp run
Enable CDP on a specific interface	Router(config-if)# cdp enable
Turn off CDP on a specific interface	Router(config-if)# no cdp enable
Reset traffic counters to 0	Router# clear cdp counters
Delete the CDP table	Router# clear cdp table
Monitor CDP neighbor information	Router# debug cdp adjacency
Monitor all CDP events	Router# debug cdp events
Monitor CDP events specifically for IP	Router# debug cdp ip
Monitor CDP packet-related information	Router# debug cdp packets
Telnet to router shem if ip host command was used previously to create a mapping of an IP address to the word shem	Router>telnet shem
Telnet to a dotted decimal address.	Router>telnet 172.16.20.1
Connect remotely to 'shem' using command other than 'telnet' command	Router> connect shem
Connect remotely to dotted decimal address without using a command.	Router> w.x.y.z
Disable ICMP redirects from this specific interface	Router(config-if)# no ip redirects
Re-enable ICMP redirects from this specific interface	Router(config-if)# ip redirects
Check for Layer 3 connectivity with device at address w.x.y.z	Router# ping w.x.y.z
Enter extended ping mode	which provides more options
Discover route taken to travel to destination	Router# traceroute w.x.y.z
Short form of traceroute command with IP host name	Router# trace paris
Set a read-only (ro) community string called shem	Router(config)# snmp-server community shem ro
Set a read-write (rw) community string called shem	Router(config)# snmp-server community shem rw
Define an SNMP string that describes the physical location of the SNMP server as 'text'.	Router(config)# snmp-server location text
Define an SNMP string that describes the sysContact information as 'text'.	Router(config)# snmp-server contact text
Enable logging to all supported destinations	Router(config)# logging on
Send logging messages to a syslog server host at address w.x.y.z	Router(config)# logging w.x.y.x
Send logging messages to a syslog server host named shem.	Router(config)# logging shem
Set the syslog server logging level to value x	where x is a number between 0 and 7 or a word defining the level. The table that follows provides more details
Give Syslog messages a timestamp	Router(config)# service timestamps log datetime
Display routing table about a specific protocol (for example	RIP or IGRP)
Display info about route w.x.y.z	Router# show ip route w.x.y.z
Display table of connected routes	Router# show ip route connected
Display table of static routes	Router# show ip route static
Display summary of all routes	Router# show ip route summary
Set network w.x.y.z to be the default route (gateway of last resort) in IGRP. All routes not in the routing table will be sent to this network	Router(config)# ip default-network w.x.y.z Must have either a specific route to that network or a 0.0.0.0 /0 default route.
Set network w.x.y.z to be the default route (gateway of last resort) in EIGRP or RIP. All routes not in the routing table will be sent to this network	Router(config)# ip route 0.0.0.0 0.0.0.0 w.x.y.z
Display IP routing protocol parameters and statistics	Router# show ip protocols
Display Telnet negotiation process	Router# debug telnet
Show interface command response of "Serial n/n is 'status'" refers to what.	Refers to physical status
Show interface command response of "line protocol is 'status' refers to what.	Referes to logical status.
What Show interface command to a serial interface response means interface is up and working.	Serial 0/0 is up
What Show interface command to a serial interface response means keepalive or connection problem (no clockrate	bad encapsulation)
What Show interface command to a serial interface response means Interface problem	or other end has not been configured.
What Show interface command to a serial interface response means nterface is disabled or shut down.	Serial 0/0 is administratively down
Reset all interface counters to 0.	Router# clear counters
Reset specific interface counters to 0	Router# clear counters interface type/slot
Turn on all possible debugging. This extremely CPU intensive.	Router# debug all
Turn off all possible debugging	Router# u all
List what debug commands are on	Router# show debug
Debug output will now be seen through a Telnet session (default is to only send output on Console screen)	Router# terminal monitor
Add a timestamp to all system logging messages	Router(config)# service timestamps
Add a timestamp to all debugging messages	Router(config)# service timestamps debug
Add a timestamp along with total uptime of router to all debugging messages	Router(config)# service timestamps debug uptime
Add a timestamp displaying local time and date to all debugging messages	Router(config)# service timestamps debug datetime localtime
Disable all timestamps	Router(config)# no service timestamps
Windows 2000/XP command to verify what IP settings are	C: ipconfig or ipconfig/all.
Windows 95/98/ME command to verify what IP settings are	C: winipcfg
Mac/Linux command to verify what IP settings are	#ifconfig
Enable the HTTP server	includ-ing the Cisco web browser user interface
Disable the HTTP server	Router(config-if)# no ip http server
Windows and UNIX/Linux command to display TCP/IP connection and protocol information.	C:netstat

Created by: doogie

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