Useful show commands by topic/technology. A work in progress as I go through my own CCIE studies.
General | Layer 2 | Frame Relay | RIP | OSPF | EIGRP | BGP | MPLS | IPv6 | Multicast | QoS
- show int status | exclude _(value)_
- show int status | i _(value)
- show tcp brief – display description of TCP connection endpoints
- show ip protocols
- show interface x/x switchport – display switchport statistics for an interface
- show spanning-tree root – displays information about the root bridge.
- show spanning-tree blockedport – displays blocked ports on the bridge
- show udld interface x/x – output from Unidirectional Link Detection per interface
- show etherchannel summary– summarized information per etherchannel
- show frame-relay map
- show frame-relay pvc
- show frame-relay lmi
- show frame-relay route
- show connection all
- show interface irb
- show ip rip database
- show ip protocols
- show ip route rip
- show ip ospf neighbor
- show ip ospf interface x/y
- show ip ospf interface x/y brief
- show ip ospf database
- show ip ospf border-routers
- show ip ospf virtual-links
- show ip ospf summary-address
EIGRP
BGP
MPLS
- show mpls forwarding
- show bgp vpnv4 unicast all labels
- show bgp vpnv4 unicast vrf (name)
- show mpls ldp neighbor
- show mpls ldp discovery
- show ip pim interface
- show ip pim neighbor
- show ip pim rp mapping
- show ip pim rp-address
- show ip rpf
QoS