Cheatography
https://cheatography.com
General Configurations
Command |
Mode |
Function |
terminal history size 200
|
priv. EXEC |
changes how many commands the history buffer stores (for this session only) |
Dynamic Routing Protocol Configuration
Command |
Mode |
Function |
router [protocol]
|
global |
enables protocol & enters router config mode |
auto-summary
|
router |
enables automatic network # summarization |
default-information originate
|
router |
advertises default route info |
network [ip-address]
|
router |
enables dynamic routing for the network
(Directly connected nets only!) |
network [ip-address] area 0
|
router |
assigns network to area 0 |
passive-interface g0/1
|
router |
disables routing updates on that interface |
version [version]
|
router |
sets protocol version |
DHCP Configuration
Command |
Mode |
ip dhcp excluded-address [first IP] [last ip]
|
global |
ip dhcp pool R1G1
|
global |
network [network IP] [subnet mask]
|
(dhcp-config) |
default-router [gateway IP]
|
(dhcp-config) |
dns-server [dns IP]
|
(dhcp-config) |
domain-name ccna-lab.com
|
(dhcp-config) |
lease 2
|
(dhcp-config) |
ip dhcp helper-address [dhcp server IP]
|
interface (on relay router) |
NAT Configuration
Short Command |
Full Command |
What It Does |
ip nat pool name
[first IP] [last IP]
net [subnet mask]
|
ip nat pool name
[first IP] [last IP]
netmask [subnet mask]
|
defines the pool of public addresses to use |
ip nat in s l 10
pool name ov
|
ip nat inside source list
[acl#] pool name overload
|
enables PAT & specifies which ACL is being translated to which NAT pool |
ip nat in
|
ip nat inside
|
identifies inside interface
(int config) |
ip nat out
|
ip nat outside
|
identifies outside interface
(int config) |
ip nat in s st
192.168.1.10 209.165.200.18
|
ip nat inside source static
[private IP] [global IP]
|
configures static NAT mapping |
----- Show Commands ----- |
sh ip nat s
|
show ip nat statistics
|
sh ip nat t
|
show ip nat translations
|
Trunking & Subinterfaces
Command |
Mode |
encapsulation dot1Q
|
|
|
Routing Table
Command |
Mode |
Function |
interface loopback 0
|
global |
loopback address configuration |
ip route [network] [subnet] [exit-int|next-hop]
ipv6 route [network/prefix] [exit-int|next-hop]
|
global |
configs a static route |
ip route 0.0.0.0 0.0.0.0 [exit-int]
ipv6 route ::/0 [exit-int]
|
global |
sets default static route |
ip route 0.0.0.0 0.0.0.0 [next-hop] [AD]
ipv6 route ::/0 [next-hop] [AD]
|
global |
configs a floating static route |
New Show Commands
Short Command |
What It Displays |
sh run int g0/0
|
running config for specified interface |
sh run | [begin|include|exclude|section] line vty
|
filtered running-config output |
sh history
|
contents of history buffer (previously entered commands) |
sh ip protocols
|
dynamic routing protocol settings |
Refresher Commands: General
Short Command |
Complete Command |
Mode |
no ip dom lo
|
no ip domain-lookup
|
global |
login blo 120 a 3 w 60
|
login block-for 120 attempts 3 within 60
|
global |
security pass min 8
|
security password min-length 8
|
global |
exec-timeout 10
|
exec-timeout 10
|
line |
Refresher Commands: Enabling SSH
Short Command |
Complete Command |
Mode |
ip dom n CCNA-lab.com
|
ip domain-name CCNA-labs.com
|
global |
cry key gen rsa gen mod 1024
|
crypto key generate rsa general-keys
modulus 1024
|
global |
user Bob sec cisco
|
username Bob secret cisco
|
global |
login lo
|
login local
|
line |
trans in ssh
|
transport input ssh
|
line |
ip ssh v 2
|
ip ssh version 2
|
global |
|
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