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最佳答案
重新分配地址不会造成端口up/down的,建议查下这些端口是否有CRC错包,更换下链路测试。
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[H3C]dis in gi 1/0/16 GigabitEthernet1/0/16 current state: UP IP Packet Frame Type: PKTFMT_ETHNT_2, Hardware Address: 3ce5-a66c-6e26 Description: GigabitEthernet1/0/16 Interface Loopback is not set Media type is twisted pair Port hardware type is 1000_BASE_T 1000Mbps-speed mode, full-duplex mode Link speed type is force link, link duplex type is autonegotiation Flow-control is not enabled The Maximum Frame Length is 9216 Broadcast MAX-ratio: 100% Unicast MAX-ratio: 100% Multicast MAX-ratio: 100% Allow jumbo frame to pass PVID: 1 Mdi type: auto Port link-type: access Tagged VLAN ID : none Untagged VLAN ID : 1 Port priority: 0 Last clearing of counters: Never Peak value of input: 2756174 bytes/sec, at 2021-03-09 16:24:26 Peak value of output: 7685220 bytes/sec, at 2021-03-02 11:57:37 Last 300 seconds input: 440 packets/sec 511948 bytes/sec 0% Last 300 seconds output: 535 packets/sec 708950 bytes/sec 1% Input (total): 42179008 packets, 24138651379 bytes 42117877 unicasts, 11868 broadcasts, 49263 multicasts, 0 pauses Input (normal): 42179008 packets, - bytes 42117877 unicasts, 11868 broadcasts, 49263 multicasts, 0 pauses Input: 0 input errors, 0 runts, 0 giants, 0 throttles 0 CRC, 0 frame, - overruns, 0 aborts - ignored, - parity errors Output (total): 80580464 packets, 95600343480 bytes 77220165 unicasts, 1814696 broadcasts, 1545603 multicasts, 0 pauses Output (normal): 80580464 packets, - bytes 77220165 unicasts, 1814696 broadcasts, 1545603 multicasts, 0 pauses Output: 0 output errors, - underruns, - buffer failures 0 aborts, 0 deferred, 0 collisions, 0 late collisions 0 lost carrier, - no carrier
这种可能性很小
updown主要排查线缆
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线路没有问题,下面的办公人员没有反应有网络故障的。
线路没有问题,下面的办公人员没有反应有网络故障的。
DHCP客户端于DHCP服务器之间的逻辑:
在DHCP客户端的IP地址租约期限达到一半左右时间时,DHCP客户端会向为它分配IP地址的DHCP服务器单播发送DHCP-REQUEST报文,以进行IP租约的更新。如果客户端可以继续使用此IP地址,则DHCP服务器回应DHCP-ACK报文,通知DHCP客户端已经获得新IP租约;如果此IP地址不可以再分配给该客户端,则DHCP服务器回应DHCP-NAK报文,通知DHCP客户端不能获得新的租约。
如果在租约的一半左右时间进行的续约操作失败,DHCP客户端会在租约期限达到7/8时,广播发送DHCP-REQUEST报文进行续约。DHCP服务器的处理方式同上,不再赘述。
软路由上逻辑应该也是这样,所以接口协议down与DHCP重新拿地址关系不大,需要着重查一下网线,看下接口下的CRC错包有没有增长。
(0)
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[H3C]dis in gi 1/0/16 GigabitEthernet1/0/16 current state: UP IP Packet Frame Type: PKTFMT_ETHNT_2, Hardware Address: 3ce5-a66c-6e26 Description: GigabitEthernet1/0/16 Interface Loopback is not set Media type is twisted pair Port hardware type is 1000_BASE_T 1000Mbps-speed mode, full-duplex mode Link speed type is force link, link duplex type is autonegotiation Flow-control is not enabled The Maximum Frame Length is 9216 Broadcast MAX-ratio: 100% Unicast MAX-ratio: 100% Multicast MAX-ratio: 100% Allow jumbo frame to pass PVID: 1 Mdi type: auto Port link-type: access Tagged VLAN ID : none Untagged VLAN ID : 1 Port priority: 0 Last clearing of counters: Never Peak value of input: 2756174 bytes/sec, at 2021-03-09 16:24:26 Peak value of output: 7685220 bytes/sec, at 2021-03-02 11:57:37 Last 300 seconds input: 440 packets/sec 511948 bytes/sec 0% Last 300 seconds output: 535 packets/sec 708950 bytes/sec 1% Input (total): 42179008 packets, 24138651379 bytes 42117877 unicasts, 11868 broadcasts, 49263 multicasts, 0 pauses Input (normal): 42179008 packets, - bytes 42117877 unicasts, 11868 broadcasts, 49263 multicasts, 0 pauses Input: 0 input errors, 0 runts, 0 giants, 0 throttles 0 CRC, 0 frame, - overruns, 0 aborts - ignored, - parity errors Output (total): 80580464 packets, 95600343480 bytes 77220165 unicasts, 1814696 broadcasts, 1545603 multicasts, 0 pauses Output (normal): 80580464 packets, - bytes 77220165 unicasts, 1814696 broadcasts, 1545603 multicasts, 0 pauses Output: 0 output errors, - underruns, - buffer failures 0 aborts, 0 deferred, 0 collisions, 0 late collisions 0 lost carrier, - no carrier