The table summarizes show commands used to verify interface configuration.
|
Commands |
Description |
|
show ip interface brief show ipv6 interface brief |
Displays all interfaces, their IP addresses, and their current status. |
|
show ip route show ipv6 route |
Displays the contents of the IP routing tables stored in RAM. |
|
show interfaces |
Displays statistics for all interfaces on the device. Only displays the IPv4 addressing information. |
|
show ip interfaces |
Displays the IPv4 statistics for all interfaces on a router. |
|
show ipv6 interfaces |
Displays the IPv6 statistics for all interfaces on a router. |
View status of all interfaces with the show ip interface brief and show ipv6 interface brief commands, shown here:
Interface IP-Address OK? Method Status Protocol
GigabitEthernet0/0/0 192.168.2.2 YES manual up up
GigabitEthernet0/0/1 unassigned YES unset up down
Serial0/1/0 192.168.3.1 YES manual up up
Serial0/1/1 unassigned YES unset down down
Vlan1 unassigned YES unset administratively down down
R2#show ipv6 interface brief
GigabitEthernet0/0/0 [up/up]
unassigned
GigabitEthernet0/0/1 [up/down]
unassigned
Serial0/1/0 [up/up]
unassigned
Serial0/1/1 [down/down]
unassigned
Vlan1 [administratively down/down]
unassigned
Display the contents of the IP routing tables with the show ip route and show ipv6 route commands as shown here:
R2#show ip route
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is not set
172.16.0.0/24 is subnetted, 2 subnets
R 172.16.1.0/24 [120/1] via 192.168.3.2, 00:00:19, Serial0/1/0
R 172.16.2.0/24 [120/1] via 192.168.2.1, 00:00:14, GigabitEthernet0/0/0
R 192.168.1.0/24 [120/1] via 192.168.2.1, 00:00:14, GigabitEthernet0/0/0
192.168.2.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.2.0/24 is directly connected, GigabitEthernet0/0/0
L 192.168.2.2/32 is directly connected, GigabitEthernet0/0/0
192.168.3.0/24 is variably subnetted, 2 subnets, 2 masks
C 192.168.3.0/24 is directly connected, Serial0/1/0
L 192.168.3.1/32 is directly connected, Serial0/1/0
R2#show ipv6 route
IPv6 Routing Table - 0 entries
Codes: C - Connected, L - Local, S - Static, R - RIP, B - BGP
U - Per-user Static route, M - MIPv6
I1 - ISIS L1, I2 - ISIS L2, IA - ISIS interarea, IS - ISIS summary
ND - ND Default, NDp - ND Prefix, DCE - Destination, NDr - Redirect
O - OSPF intra, OI - OSPF inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2
ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2
D - EIGRP, EX - EIGRP external
Display statistics for all interfaces with the show interfaces command, as shown here:
R2#show interfaces gigabitEthernet 0/0/0
GigabitEthernet0/0/0 is up, line protocol is up (connected)
Hardware is Lance, address is 0001.42bd.102e (bia 0001.42bd.102e)
Internet address is 192.168.2.2/24
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Full-duplex, 100Mb/s, media type is RJ45
ARP type: ARPA, ARP Timeout 04:00:00,
Last input 00:00:08, output 00:00:05, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0 (size/max/drops); Total output drops: 0
Queueing strategy: fifo
Output queue :0/40 (size/max)
5 minute input rate 21 bits/sec, 0 packets/sec
5 minute output rate 21 bits/sec, 0 packets/sec
34 packets input, 2408 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
0 input packets with dribble condition detected
32 packets output, 2264 bytes, 0 underruns
0 output errors, 0 collisions, 1 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out
Display IPv4 statistics for router interfaces with the show ip interface command, as shown here:
R2#show ip interface gigabitEthernet 0/0/0
GigabitEthernet0/0/0 is up, line protocol is up (connected)
Internet address is 192.168.2.2/24
Broadcast address is 255.255.255.255
Address determined by setup command
MTU is 1500 bytes
Helper address is not set
Directed broadcast forwarding is disabled
Outgoing access list is not set
Inbound access list is not set
Proxy ARP is enabled
Security level is default
Split horizon is enabled
ICMP redirects are always sent
ICMP unreachables are always sent
ICMP mask replies are never sent
IP fast switching is disabled
IP fast switching on the same interface is disabled
IP Flow switching is disabled
IP Fast switching turbo vector
IP multicast fast switching is disabled
IP multicast distributed fast switching is disabled
Router Discovery is disabled
IP output packet accounting is disabled
IP access violation accounting is disabled
TCP/IP header compression is disabled
RTP/IP header compression is disabled
Probe proxy name replies are disabled
Policy routing is disabled
Network address translation is disabled
BGP Policy Mapping is disabled
Input features: MCI Check
WCCP Redirect outbound is disabled
WCCP Redirect inbound is disabled
WCCP Redirect exclude is disabled
Display IPv6 statistics for router interfaces with the show ipv6 interface command shown here:
R2#show ipv6 interface gigabitEthernet 0/0/0
