show version
show running-config

show hosts
#hostname word
#ip host hostname ip

enable secret *****
service password-encryption
#line
-login
-password *****

confreg
tftpdnld
boot

show bootvar
show reload

boot bootldr file-url
boot bootstrap file-url
boot system file-url

config-register

show interface
show ip interface (brief)
show controllers
#interface
-ip address ip netmask
-clock rate
-encapsulation
-no shutdown

show cdp
show cdp interface
show cdp neighbors
show cdp detail
#cdp enable
#interface
-cdp run

terminal monitor
show debugging
debug ip proto
no debug ip proto
debug all
no debug all
undebug all

show access-lists
interface
-ip access-group name in|out
line
-ip access-class name in|out
#access-list name deny|permit
#ip acces-list extended name
-deny|permit proto source destination bolean port log

show protocol
show ip protocol
show ip protocols
show ip route
(config)#ip default-network netblock
(config)#ip route netblock mask hop
(config)#ip route 0.0.0.0 0.0.0.0 [interface | next-hop address ]

(config)#router rip
(config-router)# version #
(config-router)# network netblock

debug ip rip

(config)#interface loopback #
(config-if)#ip address ip-address subnet-mask

(config)#router ospf process-id
(config-router)#network address wildcard-mask area area-id
(config-router)#default-information originate
(config-router)#area area-id authentication
(config-router)#area area-id authentication message-digest

#show ip ospf interface type #
(config)#interface type #
(config-if)#bandwidth 56
(config-if)#ip ospf priority #
(config-if)#ip ospf cost #
(config-if)#ip ospf hello-interval seconds
(config-if)#ip ospf dead-interval seconds
(config-if)#ip ospf authentication-key password
(config-if)#ip ospf message-digest-key key-id encryption-type md5 key

show ip ospf neighbor
debug ip ospf packet
debug ip ospf events

(config)#router eigrp AS#
(config-router)#network netblock
(config-router)#eigrp log-neighbor-changes
(config-router)#no auto-summary

(config)#interface type #
(config-if)#bandwidth kbps
(config-if)#ip summary-address eigrp AS# ip mask [adm-dist]

show ip eigrp neighbors
debug ip igrp transactions
debug ip igrp events

(config)#interface type #
(config-if)#ip nat inside
(config)#interface type #
(config-if)#ip nat outside
^needed for dynamic ?
[static]
(config)#ip nat inside source static privateip publicip overload?

[dynamic]
(config)#access-list accl# permit ip wildmask
(config)#ip nat pool pname start-ip end-ip netmask mask
(config)#ip nat inside source list accl# pool pname overload

[dynamic]
(config)#access-list accl# permit ip wildmask
(config)#ip nat inside source list accl# interface type # overload

show ip nat statistics verbose
show ip nat translations
clear ip nat translation {* | [inside g-ip l-ip] [outside l-ip g-ip]}
debug ip nat detailed

(config-if)#ip helper-address ip

(config)# ip dhcp excluded-address ip ip

(config)# ip dhcp pool poolname
(dhcp-config)# network ip mask
(dhcp-config)# default-router ip
(dhcp-config)# dns-server ip
(dhcp-config)# lease day hour min

show ip dhcp binding
show ip dhcp server statistics
show dhcp server
show dhcp lease
debug ip dhcp server events

(config)# username word password word

(config-if)# encapsulation ppp
(config-if)# ppp chap hostname str
(config-if)#ppp authentication chap/pap
(config-if)#compress stac/predictor
(config-if)#ppp quality int
(config-if)#ppp multilink
(config-if)# ppp pap sent-username word password pass

debug ppp
debug ppp authentication
debug ppp negociation
debug ppp error

(config)/(config-if)#isdn switch-type type

[BRI]
(config-if)#isdn spid1 # [ldn]
(config-if)#isdn spid2 # [ldn]

[PRI]
(config)#controller {t1 | e1} {slot/port}
(config-controller)#framing {sf | esf} [USA]
(config-controller)#framing {crc4 | no-crc4} [EU]
(config-controller)#linecode {ami | b8zs| hdb3}
(config-controller)#pri-group [timeslotsrange]
(config)#interface serial{slot/port: | unit:}{23 | 15}

show isdn [status / active]
show dialer
show interface bri0/0:1
debug isdn
debug dialer [events/packets]
isdn call interface int phone#
clear interface bri

(config)#ip route net-prefix mask {address | interface }

(config)#interface dialer
(config-if)#dialer idle-timeout sec
(config-if)#dialer-map ip nexthop name hopword phone#
(config-if)#dialer string phone#
(config-if)#dialer remote-name word
(config-if)#dialer pool pool#
(config-if)#dialer-group dial#

(config-if)#int phys
(config-if)#dialer pool-member pool# priority #

(config)#dialer-list dial# protocol proto permit/deny
(config)#dialer-list dial# protocol proto list acl#

(config)#access-list acl# deny proto any any eq ftp
(config)#access-list acl# deny proto any any eq telnet
(config)#access-list acl# permit proto any any

[SW]
(config)#frame-relay switching
(config-if)#no ip address
(config-if)#encapsulation frame-relay
(config-if)#frame-relay intf-type dce
(config-if)#clock rate 56000
(config-if)#frame-relay route indlc interface int outdlc

[CLI]
(config-if)#ip address ip netmask
(config-if)#bandwidth 64
(config-if)#encapsulation frame-relay [cisco|ietf]
(config-if)#frame-relay lmi-type [ansi|cisco|q933a]
(config-if)#frame-relay map protol proto-addr dlci# [broadcast]

(config-if)#interface serial 0/0.dlci# point-to-point
(config-subif)#frame-relay interface-dlci dlci#

show frame-relay pvc
show frame-relay lmi
show frame-relay map
clear frame-relay-inarp
debug frame-relay lmi

(config)#snmp-server community string ro
(config)#snmp-server community string rw
(config)#snmp-server location text
(config)#snmp-server contact text
(config)#snmp-server user username groupname v3 [auth] [md5]

(config)#logging on
(config)#logging hostname | ip address
(config)#logging trap/history informational
(config)#logging facility string
(config)#logging source-interface loopback0
(config)#logging timestamps log datetime

(config)#service timestamps log datetime ??

#hostname word
#show mac-address-table
#clear mac-address-table [dynamic]
#show port security
#show interface status

(config)#ip default-gateway ip
(config)#interface VLAN 1
(config-if)#ip address ip mask
(config)#mac-address-table static mac-address of host interface FastEthernet # vlan vlan name

(config)#enable secret class
(config)#line con 0
(config-line)#password cisco
(config-line)#login
(config-line)#line vty 0 15
(config-line)#password cisco
(config-line)#login

(config)#interface fastethernet #
(config-if)#switchport mode access
(config-if)#switchport port-security
(config-if)#switchport port-security mac-address sticky
(config-if)#switchport port-security maximum 1
(config-if)#port secure
(config-if)#port secure max-mac-count 1

#show vlan [brief]
#show vlan id #
#show vlan-membership

#vlan database
(vlan)#vlan vlan# name name

(config)#interface type #[.subport]
(config-if)#switchport mode access
(config-if)#switchport access vlan vlan#

Switch(config-if)# switchport mode trunk
Switch(config-if)# switchport trunk encapsulation dot1q

#debug sw-vlan packets

#show spanning-tree [brief]

(config)#spanning-tree priority 1
(config)#spanning-tree vlan 1 priority 4096

(config)# spanning-tree vlan vlan# hello-time hello_time
(config)# spanning-tree vlan vlan# max-age 40

(config)#interface type #
(config-if)#spanning-tree cost port_cost
(config-if)#spanning-tree vlan vlan# cost port_cost

#show interfaces type 0/port_num
#show interfaces trunk
#show vtp status
#show vtp counters

#vlan database
(vlan)#vtp v2-mode
(vlan)#vtp domain cisco
(vlan)#vtp {client | server | transparent}

(config)#interface type #
(config-if)#switchport mode trunk
(config-if)#switchport trunk encapsulation dot1q
(config-if)#ip address ip-address subnet-mask

00-03

0x0000-0x000F

Boot Field Parameters 0x0000 Stays at the system bootstrap prompt 0x0001 Boots system image on EPROM 0x0002-0x000F Specifies a default netboot filename.

06

0x0040

Ignore NVRAM contents.

07

0x0080

OEM bit enabled to exclude details in boot messages.

08

0x0100

Break disabled.

10

0x0400

IP broadcast with all zeros.

11-12

0x0800-0x1000

Console line speed.

13

0x2000

Boot default ROM software if network boot fails.

14

0x4000

IP broadcasts do not have net numbers.

15

0x8000

Enable diagnostic messages and ignore NVRAM contents.