分类: 系统运维
2011-10-11 14:17:17
我管理的S3050交换机以太网端口dis int 出现output error:lost carrier说明什么问题???
附dis int
< EYS-W-KY1>dis int e0/3
Ethernet0/3 current state : UP
IP Sending Frames' Format is PKTFMT_ETHNT_2, Hardware address is 00e0-fc18-06e5
The Maximum Transmit Unit is 1500
Media type is twisted pair, loopback not set
Port hardware type is 100_BASE_TX
100Mbps-speed mode, full-duplex mode
Link speed type is autonegotiation, link duplex type is autonegotiation
Port-flow-constrain has not been configured completely
The Maximum Frame Length is 1536
Broadcast MAX-ratio: 100%
PVID: 1
Mdi type: auto
MAX mac-address learning count: 1
Port link-type: access
Tagged VLAN ID : none
Untagged VLAN ID : 1
Last 300 seconds input: 5 packets/sec 788 bytes/sec
Last 300 seconds output: 13 packets/sec 4354 bytes/sec
Input(total): 1978093 packets, 487646827 bytes
372 broadcasts, 15 multicasts
Input(normal): - packets, - bytes
- broadcasts, - multicasts
Input: 2553 input errors, 0 runts, 0 giants, - throttles, 160 CRC
177 frame, - overruns, 2216 aborts, 0 ignored, - parity errors Output(total): 5937745 packets, 2061629305 bytes
3143125 broadcasts, 659538 multicasts, 0 pauses
Output(normal): - packets, - bytes
- broadcasts, - multicasts, - pauses
Output: 1485 output errors, - underruns, - buffer failures
0 aborts, 0 deferred, 0 collisions, 0 late collisions
1485 lost carrier, - no carrier
网友:
输入错误说明:
输入错误数,input errors等于各种重要错误信息的总和。不同的产品可以根据具体情况增加其它参数,或减少不能实现的参数。
(1) Runts: discarded packets that are smaller than the medium's minimum packet size.
( Receive Byte Count < 64 and NOT CRC Error
or Receive Byte Count < 64 and Tag Packet and NOT CRC Error,
无论是否有vlan tag,数据段小于64字节,而且没有CRC校验错误的帧。)
(2) Giants: discarded packets that are larger than the medium's maximum packet size.
( Receive Byte Count > 1518 and NOT CRC Error
or Receive Byte Count > 1522 and Tag Packet and NOT CRC Error,
没有vlan tag,数据段大于1518字节,小于最大帧长度,而且没有CRC校验错误的帧,和有vlan tag,数据段大于1522字节,小于最大帧长度,而且没有CRC校验错误的帧。)
(3) Throttles: discarded packets that are incomplete frames.
( 交换机察觉缓存或CPU过载,关闭接口接收器的情形称为 throttle,是cisco路由器上的一个概念,我们的交换机目前不具备这个功能,一般应该显示为不支持。)
(4) CRC: discarded packets with checksum error.
( Receive Packet CRC error,帧长度在正常范围(不带tag,长度在64到1518之间,或带tag,长度在64到1522之间),而且CRC校验错,如果支持此项,则不支持奇偶校验错误项。)
(5) Frame: discarded packets with frame pad/sequence/alignment error, out of frame etc.
( 不是整数字节,而是多1~7bit,因此不对齐,或乱序或空帧,而且CRC校验错误,但是不计入CRC错误。)
(6) Overrun: the receiver hardware is unable to hand receiveddata to a hardware buffer because the input rate exceeds the receiver'sability to handle the data.
( 由于接口输入速率超过接受方处理能力,导致丢包,由于我们的交换机一般是线速转发,这项一般应该为0,只有部分交换机对上传CPU或三层线速转发的帧有接口带宽限制,或是通过ACL实现的带宽限制,因此被丢弃的帧,计入此项。)
(7) Aborts: Input abnormal frames that are discarded.
( 除其他错误之外,产品认为有必要统计的错误,例如前导码异常的帧,计入此项。)
(8) Ignored: packets that are discarded because the interface hardware does not have enough internal buffers.
( Packetignored,由于接口内部buffer满,丢弃的帧,与由于主系统缓存空间缺乏,导致的丢弃帧不同。线速转发的帧,在多接口满带宽输入,单接口输出等情况下,由于输出接口的带宽不足,数据帧将内部缓存占满,导致从接口输入的帧在进入内部缓存之前被丢弃,以及进入内部缓存的帧超时无法输出,计入此项,上传到CPU的帧,由于CPU处理能力限制,toCPU的缓存满,导致被丢弃,也计入此项。)
(9) Parity: Frames with parity error.
( Receive Packet parity error,如果支持此项,则不支持 CRC 错误项。)
网友2:
输入丢弃数/输入错误数,output errors等于各种重要错误信息的总和。不同的产品可以根据具体情况增加其它参数,或减少不能实现的参数。
(1) Underruns: There are no data in the output queue.
( Transmit under run,与 Overrun相反,输出接口的缓存从输出队列中取以太网帧时,没有帧,是一种非常少见的硬件异常。有的交换机就没有单独的接口输出缓存,与接口输出队列是同一块缓存。)
(2) Buffer failures: Hardware does not have enough internal buffers.
( 内部缓存满,如果输出队列满,输出的以太网帧将在内部缓存中暂时存储,由于内部缓存满,导致帧丢弃。由于交换机对线速转发的数据帧发生的这种异常,认为只是到达内部缓存而没有到达出接口,是个输入帧,因此计入 Input IgnoredError,只有从CPU发出的帧,由于内部缓存满,导致帧丢弃,计入此项。)
(3) Aborts: Output abnormal frames that are discarded.
( 在半双工模式下,由于冲突检测,延迟发送超过15次的帧,被丢弃,计入此项。除其他错误之外,产品认为有必要统计的错误,例如添加前导码异常的帧,也计入此项)
(4) Deferred: The packets could not be sent out for collision under half-duplex mode.
( 半双工模式下,由于检测到载波正在被声明,当时没有发出的包,延时一次,计数加一。)
(5) Collisions: Statistic of collision detection under half-duplex mode.
( 半双工模式下,在以太网帧数据部分的前64字节进入线路前,由于检测到冲突,当时没有发出的包。)
(6) Late collisions: Statistic of collision with GE port sendingpackets less than 512 bytes and 10/100M port less than 64 bytes.
( 半双工模式下,在以太网帧数据部分的前64字节进入线路后,由于检测到冲突,当时没有发出的包。)
(7) Lost carrier: Statistic of losing the carrier.
( 载波丢失,一般适用于串行WAN接口,发送过程中,每丢失一个载波,此计数加一,对于交换机,通常是由于线路中断造成。)
(8) No carrier: Statistic of no carrier.
( 无载波,一般适用于串行WAN接口,当试图发送帧时,如果没有载波出现 ,此计数加一,对于交换机,通常是由于线路中断造成。)