加载中…交换机show系列命令详解与辨析（一）show interface xxx
(2013-07-14 15:33:50)
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Hardware is Lance, address is
00d0.ba15.3701 (bia 00d0.ba15.3701)
BW 100000 Kbit, DLY 1000 usec,
//带宽（100M链路），延时
reliability 255/255, txload 1/255, rxload 1/255
//可靠性 ，负载
Encapsulation ARPA, loopback not set //封装 ,
回环口
Keepalive set (10 sec)
//保活设置
Full-duplex, 100Mb/s
//全双工，百兆
input flow-control is off, output
flow-control is off //输入流控 关闭，输出流控 关闭
ARP type: ARPA, ARP Timeout 04:00:00
//ARP类型及计时器
Last input 00:00:08, output 00:00:05,
output hang never //上次输入与输出时间
Last clearing of "show interface" counters
never //上次清空此命令计时器时间
Input queue: 0/75/0/0
(size/max/drops/flushes); Total output drops: 0 //输入队列
Queueing strategy: fifo //队策略：先进先出
Output queue :0/40 (size/max) //输出队列
5 minute input rate 0 bits/sec, 0
packets/sec
5 minute output rate 0 bits/sec, 0
packets/sec
956
packets input, 193351 bytes, 0 no buffer
//输入数据包数量，及输入缓存区
Received 956 broadcasts, 0 runts, 0 giants, 0
throttles
//广播包(小矮子包<64，巨人包>1518)
0
watchdog, 0 multicast, 0 pause input //检测到死循环，多播包，暂停
0
input packets with dribble condition detected
//没有检测到大于MTU小于GIANT的包
2357
packets output, 263570 bytes, 0 underruns
//输出包，正在发包
0
output errors, 0 collisions, 10 interface resets
//输出错误，冲突，端口重启
0
babbles, 0 late collision, 0 deferred //可疑帧 ，线路过长造成的冲突帧，推迟
0 lost
carrier, 0 no carrier // 丢失载波
0
output buffer failures, 0 output buffers swapped out
//输出缓冲区错误，输出缓存区换出
Switch#sho int fa0/1 //看交换机的TRUNK口
FastEthernet0/1 is up, line protocol is up (connected)
//这两句话信息量很大：第一个UP是口打开（默认），被管理员关闭则为administratively down.
第二个UP是链路协议通，二层协议mismatch会导致这个down。如果后面括号为disable，则是被防环协议关掉。
//这个端口的物理地址（交换机上每个端口都有一个不同的物理地址）
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
//错误，校验码，帧，泛滥，忽略，缺失
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