Important show commands

show ip route
show int
show ip int
show protocols
show processes
show ip ospf neighbor
show ip ospf interface
show ip ospf 10

[Router#show ip ospf ?
  <1-65535>       Process ID number ]

show vlan
show vlan brief
show vlan id
show vlan name

Switch#show cdp ?

entry Information for specific neighbor entry

interface CDP interface status and configuration

neighbors CDP neighbor entries

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Switch#show cdp entry ?

* all CDP neighbor entries

WORD Name of CDP neighbor entry

Switch#show cdp neighbors ?

detail Show detailed information

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show hosts