Cisco - Router/Switch - Health Check Commands

Detailed list of Cisco Router/Switch health check commands that can be used for baseline comparison (pre & post check) while performing major change/activity on a Cisco Router or Switch. These commands provides comprehensive output & can be used for general health check too.

Command	Description
show version	System hardware and software status
show bootvar	Boot and related environment variable
show inventory	Show the physical inventory
show module	show linecard module information
show environment	environmental status display commands
show power status all	Switch Power
show redundancy	Redundancy Facility (RF) information
show running-config	Current operating configuration
show startup-config	Contents of startup configuration
show cdp neighbors	CDP neighbor entries
show ip interface brief	Interface - Brief summary of IP status and configuration
show interface status	Show interface line status
show interface trunk	Show interface trunk information
show interface | in error	Interface errors
show interface | in drop	Interface drops
show mac-address-table	MAC forwarding table
show ip arp	IP ARP table
show vlan	VTP VLAN status
show vtp status	VTP domain status
show standby brief	Hot Standby Router Protocol (HSRP) information - Brief output
show ip vrf	VPN Routing/Forwarding instance information
show ip route summary	IP routing table summary
show ip protocols	IP routing protocol process parameters and statistics
show ip ospf neighbor	OSPF Neighbor list
show ip bgp neighbor	BGP Neighbor list
show ip eigrp neighbor	EIGRP Neighbor list
show ip rip database	IP RIP database
sh ip route	IP routing table
show spanning-tree summary	Spanning tree - Summary of port states
show spanning-tree brief	Spanning tree - Brief
show spanning-tree detail	Spanning tree - Detailed information
show logging	Show the contents of logging buffers
show ntp status	NTP status
show snmp	snmp statistics
show ip flow export	NetFlow switching - Display export statistics
show ip cache flow	IP fast-switching route cache - flow cache entries
show ip igmp membership	IGMP membership information for forwarding
show ip igmp  groups	IGMP group membership information
show ip igmp  interface	IGMP interface information
show ip mroute summary	IP multicast routing table - Provide abbreviated display
show ip sla	Service Level Agreement (SLA)
show proc cpu history	Show CPU use per process - Show CPU history in graph format
show memory	Memory statistics