What does the show ip route command display and what do the route codes mean?

Question

Accepted Answer

show ip route displays the router's IPv4 routing table; the leading code shows the route source — L/C for directly connected, S for static, O for OSPF, D for EIGRP, and S for a static default route.*
The show ip route command displays the IPv4 routing table on a Cisco router.
Route source codes:

Code
Meaning

L
Directly connected local interface IP address

C
Directly connected network

S
Static route (manually configured by administrator)

O
OSPF (dynamically learned)

D
EIGRP (dynamically learned)

S*
Static default route (candidate default)

Route entry components:

Destination network - The network this route reaches
Outgoing interface - Which interface to use
Next hop - IP address of next router (if applicable)
Administrative distance - Trustworthiness of route source
Metric - Cost to reach the destination

Route type summary:

Directly Connected: C and L
Remote Routes: O, D, etc.
Default Route: S*

Go deeper:

Wikipedia — Routing table — route sources, administrative distance, and metrics behind the codes.

Code	Meaning
L	Directly connected local interface IP address
C	Directly connected network
S	Static route (manually configured by administrator)
O	OSPF (dynamically learned)
D	EIGRP (dynamically learned)
S*	Static default route (candidate default)