Show & diagnostics

show ip interface brief

One-line per interface: IP, admin status, line protocol. The single most useful verification command.

Works on: Router, SwitchMode: enable

Example

R1# sh ip int br

Sample output

Interface              IP-Address      OK?  Method  Status                Protocol
Gi0/0                  10.0.0.1        YES  manual  up                    up
Gi0/1                  10.0.1.1        YES  manual  up                    up
Se0/0/0                unassigned      YES  manual  up                    down
Se0/0/1                unassigned      YES  manual  up                    down

Captured from the NetForge-AI simulator running a real topology.

Watch out

Status column = admin state. Protocol column = real line protocol (needs cable + peer up).

Run this command live

Don't just read it — type show ip interface brief in a real network simulator in your browser and watch it take effect. No install, no account needed to start.

Open the lab

Frequently asked

What does the "show ip interface brief" command do?

One-line per interface: IP, admin status, line protocol. The single most useful verification command.

What's the common gotcha with "show ip interface brief"?

Status column = admin state. Protocol column = real line protocol (needs cable + peer up).

Example of "show ip interface brief"

R1# sh ip int br

More Show & diagnostics commands

show running-config show startup-config show interfaces [iface]show interfaces status show interfaces switchport show vlan brief show mac address-table show ip route show ip route <protocol>show ip ospf neighbor show ip ospf interface show ip eigrp neighbors

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