【网络】接口状态
在主机上或是通信设备上查看接口的可用状态。 如Linux主机上：
root@ubuntu:~# ifconfig
eth0 Link encap:Ethernet HWaddr fa:16:3e:e4:22:fa
inet addr:192.168.56.185 Bcast:192.168.56.255 Mask:255.255.255.0
inet6 addr: fe80::f816:3eff:fee4:22fa/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:55798187 errors:0 dropped:151349 overruns:0 frame:0
TX packets:11139056 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:13187062256 (13.1 GB) TX bytes:64443662032 (64.4 GB)
通信设备上，如交换机上：
Router#show ip int b
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 10.118.202.232 YES NVRAM up up
Router#show interfaces FastEthernet 0/0
FastEthernet0/0 is up, line protocol is up
Hardware is MV96340 Ethernet, address is b414.89cb.10a0 (bia b414.89cb.10a0)
Internet address is 10.118.202.232/24
MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s, 100BaseTX/FX
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Input queue: 1/75/10209296/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 308000 bits/sec, 135 packets/sec
5 minute output rate 503000 bits/sec, 116 packets/sec
1700702357 packets input, 844523626 bytes
Received 292705373 broadcasts, 0 runts, 0 giants, 94822 throttles
79731784 input errors, 0 CRC, 0 frame, 0 overrun, 79731784 ignored
0 watchdog
0 input packets with dribble condition detected
1931737604 packets output, 2288646686 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
13635531 unknown protocol drops
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out
Router#