求网络大神帮忙分析网络掉线的原因。

ghsy3056_cu

公司用的10M光纤接进机房的。
连接了H3C MSR20-11路由器。下面接的交换机和10几台服务器。  
从上周开始每天突然断网四五次。。断了后20多秒就自动连接上正常了。断的时候所有的客户端都断线。
ping 网关192.168.1.1也不通。Ping外网的网址也不通。。
断网时使用arp -a查看，网关的IP和MAC都是正确的，和没断网时是一样的。
客户端也全部杀毒了。请大神们帮忙分析分析原因。
给联通的打电话，工程师分析了半天说断网时ping网关不通。线路的原因可能性小。
让重点排查内网呢。

ghsy3056_cu

补充一点，公司分了俩个网段，192.168.1是办公用的。172.1.1是那10多台服务器用的。
断网时ping这俩个网段都ping不通。

沉寂

这个怎么感觉是交换机的问题啊？是不是过热了，然后重启了，或者有人手工重启了，呵呵……

ghsy3056_cu

那我怎么判断是交换机的问题。机房只有我一个人有钥匙，没人重启。交换机我看了一下也不热。
那我把笔记本插到H3C MSR20-11路由器上或者交换机上看一下其他客户端都断网时我是否断网。。
这样也行吧。

ghsy3056_cu

今天又断网好几次，请告诉帮忙看看路由器日志，谢谢

<H3C>dis log
Logging buffer configuration and contents:enabled
Allowed max buffer size : 1024
Actual buffer size : 512
Channel number : 4 , Channel name : logbuffer
Dropped messages : 0
Overwritten messages : 3
Current messages : 512

%Jan  1 00:01:29:721 2007 H3C IFNET/3/LINK_UPDOWN: Ethernet0/0 link status is UP
.
%Jan  1 00:01:29:721 2007 H3C IFNET/5/LINEPROTO_UPDOWN: Line protocol on the int
erface Ethernet0/0 is UP.
%Jan  1 00:01:29:722 2007 H3C IFNET/3/LINK_UPDOWN: Ethernet0/1 link status is UP
.
%Jan  1 00:01:29:722 2007 H3C IFNET/3/LINK_UPDOWN: Ethernet0/2 link status is UP
.
%Jan  1 00:01:29:816 2007 H3C IFNET/3/LINK_UPDOWN: Vlan-interface1 link status i
s UP.
%Jan  1 00:01:29:816 2007 H3C IFNET/5/LINEPROTO_UPDOWN: Line protocol on the int
erface Vlan-interface1 is UP.
%Jan  1 00:03:45:114 2007 H3C DHCPSD/5/DHCPS_ALLOCATE_IP: DHCP server informatio
n: Server IP = 192.168.1.1, DHCP client IP = 192.168.1.6, DHCP client hardware a
ddress = 001b-3832-3c6e, DHCP client lease = 86400.
%Jan  1 05:05:14:962 2007 H3C SC/6/SC_AAA_LAUNCH: -AAAType=AUTHEN-AAAScheme= loc
al-Service=login-UserName=root@system; AAA launched.
%Jan  1 05:05:14:963 2007 H3C SHELL/5/SHELL_LOGINFAIL:  TELNET user root failed
to log in from 197.7.65.22 on VTY0.
%Jan  1 08:36:17:821 2007 H3C SHELL/5/SHELL_LOGINFAIL:  TELNET user root failed
to log in from 59.165.108.194 on VTY0.
%Jan  1 08:36:17:821 2007 H3C SC/6/SC_AAA_LAUNCH: -AAAType=AUTHEN-AAAScheme= loc
al-Service=login-UserName=root@system; AAA launched.
%Jan  1 16:12:33:373 2007 H3C DHCPSD/5/DHCPS_ALLOCATE_IP: DHCP server informatio
n: Server IP = 192.168.1.1, DHCP client IP = 192.168.1.10, DHCP client hardware
address = 8c89-a570-32c6, DHCP client lease = 86400.
%Jan  1 16:16:35:474 2007 H3C DHCPSD/5/DHCPS_ALLOCATE_IP: DHCP server informatio
n: Server IP = 192.168.1.1, DHCP client IP = 192.168.1.11, DHCP client hardware
address = f0de-f160-c3b0, DHCP client lease = 86400.
%Jan  1 16:27:04:973 2007 H3C DHCPSD/5/DHCPS_ALLOCATE_IP: DHCP server informatio
n: Server IP = 192.168.1.1, DHCP client IP = 192.168.1.7, DHCP client hardware a
ddress = f0de-f1e8-ff33, DHCP client lease = 86400.
%Jan  1 16:30:39:542 2007 H3C DHCPSD/5/DHCPS_ALLOCATE_IP: DHCP server informatio
n: Server IP = 192.168.1.1, DHCP client IP = 192.168.1.12, DHCP client hardware
address = f0de-f1e8-f0a6, DHCP client lease = 86400.
%Jan  1 16:42:26:973 2007 H3C DHCPSD/5/DHCPS_ALLOCATE_IP: DHCP server informatio
n: Server IP = 192.168.1.1, DHCP client IP = 192.168.1.8, DHCP client hardware a
ddress = f0de-f142-e714, DHCP client lease = 86400.
%Jan  1 17:39:52:504 2007 H3C DHCPSD/5/DHCPS_ALLOCATE_IP: DHCP server informatio
n: Server IP = 192.168.1.1, DHCP client IP = 192.168.1.14, DHCP client hardware
address = 4437-e6ae-320d, DHCP client lease = 86400.
%Jan  1 18:16:00:904 2007 H3C DHCPSD/5/DHCPS_ALLOCATE_IP: DHCP server informatio
n: Server IP = 192.168.1.1, DHCP client IP = 192.168.1.17, DHCP client hardware
address = 001f-d048-016c, DHCP client lease = 86400.
%Jan  1 19:17:39:004 2007 H3C SC/6/SC_AAA_LAUNCH: -AAAType=AUTHEN-AAAScheme= loc
al-Service=login-UserName=telnet@system; AAA launched.
%Jan  1 19:17:39:005 2007 H3C SC/6/SC_AAA_SUCCESS: -AAAType=AUTHEN-AAAScheme= lo
cal-Service=login-UserName=telnet@system; AAA is successful.
%Jan  1 19:17:39:005 2007 H3C SC/6/SC_AAA_LAUNCH: -AAAType=AUTHOR-AAAScheme= loc
al-Service=login-UserName=telnet@system; AAA launched.
%Jan  1 19:17:39:006 2007 H3C SC/6/SC_AAA_SUCCESS: -AAAType=AUTHOR-AAAScheme= lo
cal-Service=login-UserName=telnet@system; AAA is successful.
%Jan  1 19:17:39:007 2007 H3C SC/6/SC_AAA_LAUNCH: -AAAType=ACCOUNT-AAAScheme= lo
cal-Service=login-UserName=telnet@system; AAA launched.

<H3C>

沉寂

最后一段日志有问题，AAA认证这段在频繁进行认证，具体原因可能是有异常登录造成的，建议添加一下ACL，试一下。

ghsy3056_cu

我给联通负责光纤的工程师打电话，第一段日志是反复的up/down。
他说是可能是网线没插好，或者是光纤收发器问题、也有可能是华三路由器问题。

沉寂

网线没接好其实很容易识别，看一下灯就行了，设备问题感觉可能性更大。另外，这种情况加一下ACL稍微防一下吧，反正也没什么影响。

ghsy3056_cu

好的，谢谢斑竹。

lxjsarah

做一下固件升级呢？