Some basic Troubleshoot/Show Command for Router/Switch/ASA

Some basic Troubleshoot/Show Command for Router/Switch/ASA:

Basic Show command:

Router#show clock

Router#show version               >> System hardware and software status

Router#show hosts   >> IP domain-name, lookup style, nameservers, and host table

Router#show file systems        >> Device File Systems

Router#show flash:                  >> about flash: file system

Router#show running-config   >> Current operating configuration
Router#show startup-config               >> Startup configuration 
Router#copy running-config startup-config >>Save running to startup config
Router#write                                          >>Save running to startup config

Router#show arp                      >>  IP ARP table

Router#show cdp neighbors     >> CDP neighbor entries

Show Routing table:

Router#show ip route >> on router/switch

ASA#show route >> on ASA

NAT/PAT:

Router#show ip nat translations  >> Translation entries

VLAN Troubleshoot command:

Router#show vtp status                    >> VTP domain status

Router#show vlan-switch brief        >> VTP all VLAN status in brief

Router#show interfaces vlan  1         >> Catalyst Vlans

Router#show interfaces trunk           >> Show interface trunk information

Switch#vlan database    >> see vlan info

ACL:

Router#show access-lists 10     >> ACL number

Router#show access-lists abc   >> ACL name