小型机故障(2007-9-3)

小型机故障记录

故障机器： 主机名 H852

Boot IP 10.10.20.30 Service IP 10.10.20.40 Standby IP 192.168.0.20

故障时间： 2007年9月3日下午2点左右

故障现象： 同一网段的小型机与该主机通信正常，但跨网段的机器无法与该主机通信 初步判断： 该主机的网络设置被改动，或者是网络设备物理或逻辑上的变动所致 处理过程： 1 询问网络管理员，他们最近没有对网络设备作物理或逻辑上的调整 2 在本机查网络设置和日志

通过对本机的配置进行查询，发现存在如下现象，现详细记录如下： 1 # hostname

H852 2 # ifconfig -a en0:

flags=4e080863,80

inet 10.10.20.40 netmask 0xffffff00 broadcast 10.10.20.255 en1:

flags=4e080863,80

inet 10.0.0.1 netmask 0xff000000 broadcast 10.255.255.255

lo0: flags=e08084b inet 127.0.0.1 netmask 0xff000000 broadcast 127.255.255.255 inet6 ::1/0

tcp_sendspace 131072 tcp_recvspace 131072 rfc1323 1

3 # netstat –r Routing tables

Destination Gateway Flags Refs Use If PMTU Exp Groups

Route Tree for Protocol Family 2 (Internet):

default 10.10.20.1 UG 0 1312547 en0 - - - 10.0.0.0 10.0.0.1 UHSb 0 0 en1 - - - => 10/8 10.0.0.1 U 3 11028 en1 - - - 10.0.0.1 loopback UGHS 0 2 lo0 - - - 10.10.20.0 loopback UHSb 0 0 lo0 - - - => 10.10.20.0 h852_service UHSb 0 0 en0 - - - => 10.10.20/24 h852_service U 5 104741 en0 - - - h852_service loopback UGHS 0 16668 lo0 - - - 10.10.20.255 loopback UHSb 0 269 lo0 - - - => 10.10.20.255 h852_service UHSb 0 2 en0 - - - 10.255.255.255 10.0.0.1 UHSb 0 0 en1 - - -

127/8 loopback U 21 14059043 lo0 - - -

Route Tree for Protocol Family 24 (Internet v6):

::1 ::1 UH 0 0 lo0 - - - #

4 # errpt # errpt

IDENTIFIER TIMESTAMP T C RESOURCE_NAME DESCRIPTION AFA89905 0903163807 I O grpsvcs Group Services daemon started

92E96A0D 0903163807 P U topsvcs Local adapter misconfiguration detected 97419D60 0903163807 I O topsvcs Topology Services daemon started 5294E5FF 0903163807 I O topsvcs Missing or incorrect adapter address 6D19271E 0903143807 I O topsvcs Topology Services daemon stopped 28854E81 0903143807 I O grpsvcs Group Services daemon stopped 99FA80C7 0903143807 U S haemd SOFTWARE

9D30B78E 0826234007 T S tty1 RECEIVER OVER-RUN ON INPUT 9D30B78E 0825124307 T S tty1 RECEIVER OVER-RUN ON INPUT 9D30B78E 0825050007 T S tty1 RECEIVER OVER-RUN ON INPUT 9D30B78E 0822205307 T S tty1 RECEIVER OVER-RUN ON INPUT 9D30B78E 0821200307 T S tty1 RECEIVER OVER-RUN ON INPUT 9D30B78E 0818012907 T S tty1 RECEIVER OVER-RUN ON INPUT 9D30B78E 0812174207 T S tty1 RECEIVER OVER-RUN ON INPUT 3C81E43F 0720000007 P U topsvcs Late in sending heartbeat

92E96A0D 0716171507 P U topsvcs Local adapter misconfiguration detected

5 # errpt –aj 5294E5FF

--------------------------------------------------------------------------- LABEL: TS_FD_INVAL_ADDR_ST IDENTIFIER: 5294E5FF

Date/Time: Mon Sep 3 16:38:36 BEIST 2007 Sequence Number: 95368

Machine Id: 000C4ADF4C00 Node Id: h852 Class: O Type: INFO

Resource Name: topsvcs

Description

Missing or incorrect adapter address

Probable Causes

Adapter is not configured

Adapter has no address

Adapter has an address that is outside the configuration

User Causes

Adapter was incorrectly configured

Recommended Actions

Correct adapter configuration: its address must match the boot-time address expected by Topology Services

Failure Causes

A problem occurred when configuring the adapter

Recommended Actions

Correct adapter configuration: its address must match the boot-time address expected by Topology Services

Detail Data

DETECTING MODULE

rsct,force_down.C,1.11,501 ERROR ID

6zLCZG/AUwq4/w8P.SEV08.................... REFERENCE CODE

Interface name en1

Actual address 10.0.0.1

Expected boot-time address 192.168.0.20

6 # errpt –aj 92E96A0D

--------------------------------------------------------------------------- LABEL: TS_MISCFG_EM IDENTIFIER: 92E96A0D

Date/Time: Mon Sep 3 16:38:37 BEIST 2007 Sequence Number: 95370

Machine Id: 000C4ADF4C00 Node Id: h852 Class: U

Type: PEND

Resource Name: topsvcs Resource Class: NONE

Resource Type: NONE Location: VPD:

Description

Local adapter misconfiguration detected

Probable Causes

Local adapter assigned incorrect IP address

Install Causes

Local adapter assigned incorrect IP address

Recommended Actions Correct adapter IP address

If the problem persists, restart Topology Services daemon.

Detail Data

DETECTING MODULE

rsct,nim_control.C,1.38,4338 ERROR ID

6BcKuG0BUwq4/2DC/SEV08.................... REFERENCE CODE

Adapter interface name en1

Adapter offset 1

Adapter expected IP address 192.168.0.20

--------------------------------------------------------------------------- LABEL: TS_MISCFG_EM IDENTIFIER: 92E96A0D

Date/Time: Mon Jul 16 17:15:35 BEIST 2007 Sequence Number: 95344

Machine Id: 000C4ADF4C00 Node Id: h852 Class: U

Type: PEND

Resource Name: topsvcs Resource Class: NONE Resource Type: NONE Location: VPD:

Description

Local adapter misconfiguration detected

Probable Causes

Local adapter assigned incorrect IP address

Install Causes

Local adapter assigned incorrect IP address

Recommended Actions Correct adapter IP address

If the problem persists, restart Topology Services daemon.

Detail Data

DETECTING MODULE

rsct,nim_control.C,1.38,4338 ERROR ID

6BcKuG0rQna4/yPD1SEV08.................... REFERENCE CODE

Adapter interface name en1

Adapter offset 1

Adapter expected IP address 192.168.0.20

7 部分登录信息 # last

root pts/2 RAC_P5711 Sep 04 09:31 - 09:44 (00:13) root pts/1 RAC_P5711 Sep 04 09:17 still logged in. root pts/3 h851_service Sep 03 16:51 - 17:04 (00:13) root pts/2 RAC_P5711 Sep 03 16:47 - 16:58 (00:11) root pts/1 h851_service Sep 03 16:42 - 18:57 (02:15) root lft0 Sep 03 13:55 - 16:40 (02:44) root pts/1 10.20.222.28 Aug 24 15:24 - 16:53 (01:29) root pts/1 10.10.30.101 Aug 24 10:14 - 12:24 (02:10) root pts/1 10.20.222.29 Aug 21 20:05 - 20:11 (00:05) root pts/1 10.20.222.29 Aug 21 19:30 - 19:31 (00:01) root pts/1 h851_service Aug 21 15:20 - 16:57 (01:37) root lft0 Aug 14 16:27 - 16:55 (00:27) root dtremote 10.20.10.158:0 Aug 14 09:03 - 13:38 (04:35) root pts/1 10.10.30.100 Aug 09 11:08 - 15:41 (04:33) root dtremote 10.20.10.158:0 Aug 09 10:34 - 10:43 (00:09) root pts/0 10.20.10.174 Aug 03 08:59 - 13:16 (04:17)

root pts/1 h851_service Jul 18 16:34 - 16:36 (00:01) root pts/1 10.20.10.174 Jul 17 16:47 - 23:18 (06:31) root pts/1 10.20.10.174 Jul 17 08:41 - 14:18 (05:37) root pts/1 10.20.10.174 Jul 16 18:00 - 18:02 (00:02) root dtremote 10.20.10.41:1 Jul 16 16:58 - 17:19 (00:20) root pts/1 10.20.10.41 Jul 16 16:48 - 16:55 (00:07) root lft0 Jul 16 16:28 - 17:03 (11+00:34) root pts/0 10.10.20.65 Jul 16 16:25 - 16:26 (00:00) root pts/0 10.20.10.24 May 22 09:28 - 09:29 (00:00) root pts/0 10.20.10.77 May 16 15:43 - 15:43 (00:00) root pts/0 10.10.10.33 root pts/0 10.20.10.33 root pts/0 10.20.10.33 root lft0 reboot ~ shutdown pts/0 root lft0 root pts/0 h851_stby root pts/0 h851_stby root pts/0 h851_stby root lft0 reboot ~ shutdown lft0 root lft0 reboot ~ reboot ~ shutdown lft0 root lft0 reboot ~ shutdown lft0 oracle ftp 10.20.10.28 \

shutdown lft0 oracle ftp 10.20.10.28 root pts/2 10.10.20.15 oracle ftp 10.20.10.28 oracle ftp 10.20.10.28 oracle ftp 10.20.10.28 oracle ftp 10.20.10.28 oracle ftp 10.20.10.28 oracle pts/1 10.20.10.60 root pts/1 10.0.1.199 root pts/1 10.0.1.199 root pts/1 10.0.1.199 root pts/1 10.0.1.199 root pts/1 10.0.1.199 Apr 26 23:26 - 23:28 (00:02) Apr 26 10:04 - 10:08 (00:04) Apr 25 09:51 - 11:31 (01:39)

Apr 06 10:14 - 16:19 (101+06:05) Apr 06 10:09 Apr 06 10:00

Apr 06 09:45 - 10:00 (00:14) Aug 25 11:05 - 11:05 (00:00) Aug 21 15:07 - 15:24 (00:17) Aug 21 10:53 - 11:00 (00:06) Jul 25 19:41 - 10:15 (203+14:33) Jul 25 19:37 Jul 25 14:56

Jun 22 11:42 - 14:55 (33+03:13) Jun 21 12:29 Apr 28 10:54 Apr 28 10:28

Apr 28 10:27 - 10:28 (00:01) Apr 28 10:23 Apr 28 09:56

Apr 27 08:58 - 08:58 (00:00) Apr 28 09:56

Apr 27 08:58 - 08:58 (00:00) Apr 26 10:48 - 10:53 (00:05) Apr 26 09:45 - 09:45 (00:00) Apr 26 09:32 - 09:32 (00:00) Apr 26 08:58 - 08:58 (00:00) Apr 25 09:01 - 09:02 (00:01) Apr 24 08:59 - 09:00 (00:01) Apr 21 15:36 - 15:48 (00:11) Apr 21 10:01 - 10:01 (00:00) Apr 21 09:51 - 09:51 (00:00) Apr 21 09:40 - 09:41 (00:00) Apr 21 09:30 - 09:30 (00:00) Apr 21 09:20 - 09:20 (00:00)

root pts/1 10.0.1.199 Apr 21 09:10 - 09:10 (00:00) root pts/1 10.0.1.199 Apr 21 09:00 - 09:00 (00:00) root pts/1 10.0.1.199 Apr 21 08:50 - 08:50 (00:00) root pts/1 10.0.1.199 Apr 21 08:39 - 08:40 (00:00) root pts/1 10.0.1.199 Apr 21 08:29 - 08:29 (00:00) root pts/1 10.0.1.199 Apr 21 08:19 - 08:19 (00:00) root pts/1 10.0.1.199 Apr 21 08:09 - 08:09 (00:00) root pts/1 10.0.1.199 Apr 21 07:59 - 07:59 (00:00) root pts/1 10.0.1.199 Apr 21 07:49 - 07:49 (00:00) root pts/1 10.0.1.199 Apr 21 07:38 - 07:39 (00:00) root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 Apr 21 07:28 - 07:28 Apr 21 07:18 - 07:18 Apr 21 07:08 - 07:08 Apr 21 06:58 - 06:58 Apr 21 06:48 - 06:48 Apr 21 06:37 - 06:38 Apr 21 06:27 - 06:27 Apr 21 06:17 - 06:17 Apr 21 06:07 - 06:07 Apr 21 05:57 - 05:57 Apr 21 05:47 - 05:47 Apr 21 05:37 - 05:37 Apr 21 05:26 - 05:26 Apr 21 05:16 - 05:16 Apr 21 05:06 - 05:06 Apr 21 04:56 - 04:56 Apr 21 04:46 - 04:46 Apr 21 04:36 - 04:36 Apr 21 04:25 - 04:25 Apr 21 04:15 - 04:15 Apr 21 04:05 - 04:05 Apr 21 03:55 - 03:55 Apr 21 03:45 - 03:45 Apr 21 03:55 - 03:55 Apr 21 03:45 - 03:45 Apr 21 03:35 - 03:35 Apr 21 03:24 - 03:24 Apr 21 03:14 - 03:14 Apr 21 03:04 - 03:04 Apr 21 02:54 - 02:54 Apr 21 02:44 - 02:44 Apr 21 02:34 - 02:34 Apr 21 02:23 - 02:23 Apr 21 02:13 - 02:13 Apr 21 02:03 - 02:03 Apr 21 01:53 - 01:53 (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00)

root pts/1 10.0.1.199 Apr 21 01:43 - 01:43 (00:00) root pts/1 10.0.1.199 Apr 21 01:33 - 01:33 (00:00) root pts/1 10.0.1.199 Apr 21 01:22 - 01:22 (00:00) root pts/1 10.0.1.199 Apr 21 01:12 - 01:12 (00:00) root pts/1 10.0.1.199 Apr 21 01:02 - 01:02 (00:00) root pts/1 10.0.1.199 Apr 21 00:52 - 00:52 (00:00) root pts/1 10.0.1.199 Apr 21 00:42 - 00:42 (00:00) root pts/1 10.0.1.199 Apr 21 00:32 - 00:32 (00:00) root pts/1 10.0.1.199 Apr 21 00:21 - 00:22 (00:00) root pts/1 10.0.1.199 Apr 21 00:11 - 00:11 (00:00) root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 Apr 21 00:01 - 00:01 Apr 20 23:51 - 23:51 Apr 20 23:41 - 23:41 Apr 20 23:31 - 23:31 Apr 20 23:20 - 23:20 Apr 20 23:10 - 23:10 Apr 20 23:00 - 23:00 Apr 20 22:50 - 22:50 Apr 20 22:40 - 22:40 Apr 20 22:30 - 22:30 Apr 20 22:19 - 22:20 Apr 20 22:09 - 22:09 Apr 20 21:59 - 21:59 Apr 20 21:49 - 21:49 Apr 20 21:39 - 21:39 Apr 20 21:29 - 21:29 Apr 20 21:18 - 21:19 Apr 20 21:08 - 21:08 Apr 20 20:58 - 20:58 Apr 20 20:48 - 20:48 Apr 20 20:38 - 20:38 Apr 20 20:28 - 20:28 Apr 20 20:17 - 20:18 Apr 20 20:07 - 20:07 Apr 20 20:17 - 20:18 Apr 20 20:07 - 20:07 Apr 20 19:57 - 19:57 Apr 20 19:47 - 19:47 Apr 20 19:37 - 19:37 Apr 20 19:27 - 19:27 Apr 20 19:16 - 19:17 Apr 20 19:06 - 19:06 Apr 20 18:56 - 18:56 Apr 20 18:46 - 18:46 Apr 20 18:36 - 18:36 Apr 20 18:26 - 18:26 (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00) (00:00)

root pts/1 10.0.1.199 Apr 20 18:15 - 18:16 (00:00) root pts/1 10.0.1.199 Apr 20 18:05 - 18:05 (00:00) root pts/1 10.0.1.199 Apr 20 17:55 - 17:55 (00:00) root pts/1 10.0.1.199 Apr 20 17:45 - 17:45 (00:00) root pts/1 10.0.1.199 Apr 20 17:35 - 17:35 (00:00) root pts/1 10.0.1.199 Apr 20 17:25 - 17:25 (00:00) root pts/1 10.0.1.199 Apr 20 17:15 - 17:15 (00:00) root pts/1 10.0.1.199 Apr 20 17:04 - 17:04 (00:00) root pts/1 10.0.1.199 Apr 20 16:54 - 16:54 (00:00) root pts/1 10.0.1.199 Apr 20 16:44 - 16:44 (00:00) root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/1 root pts/2 oracle pts/1 root pts/1 root pts/1 root pts/1 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 10.0.1.199 Apr 20 16:34 - 16:34 (00:00) Apr 20 16:24 - 16:24 (00:00) Apr 20 16:14 - 16:14 (00:00) Apr 20 16:03 - 16:03 (00:00) Apr 20 15:53 - 15:53 (00:00) Apr 20 15:43 - 15:43 (00:00) Apr 20 15:33 - 15:33 (00:00) Apr 20 15:23 - 15:23 (00:00) Apr 20 15:13 - 15:13 (00:00) Apr 20 15:02 - 15:02 (00:00) Apr 20 14:52 - 14:52 (00:00) Apr 20 14:42 - 14:42 (00:00) Apr 20 14:32 - 14:32 (00:00) Apr 20 14:22 - 14:22 (00:00) Apr 20 14:12 - 14:12 (00:00) Apr 20 14:01 - 14:01 (00:00) Apr 20 13:51 - 13:51 (00:00) Apr 20 13:41 - 13:41 (00:00) Apr 20 13:31 - 13:31 (00:00) Apr 20 13:21 - 13:21 (00:00) Apr 20 13:11 - 13:11 (00:00) Apr 20 13:00 - 13:01 (00:00) Apr 20 12:50 - 12:50 (00:00) Apr 20 12:40 - 12:40 (00:00) Apr 20 12:30 - 12:30 (00:00) Apr 20 12:40 - 12:40 (00:00) Apr 20 12:30 - 12:30 (00:00) Apr 20 12:20 - 12:20 (00:00) Apr 20 12:10 - 12:10 (00:00) Apr 20 11:59 - 12:00 (00:00) Apr 20 11:49 - 11:49 (00:00) Apr 20 11:39 - 11:39 (00:00) Apr 20 11:36 - 11:43 (00:07) Apr 20 11:29 - 11:29 (00:00) Apr 20 11:19 - 11:19 (00:00) Apr 20 11:09 - 11:09 (00:00)

10.20.10.60 root pts/1 10.0.1.199 Apr 20 10:58 - 10:59 (00:00) root pts/1 10.0.1.199 Apr 20 10:48 - 10:48 (00:00) root pts/1 10.0.1.199 Apr 20 10:38 - 10:38 (00:00) root pts/1 10.0.1.199 Apr 20 10:28 - 10:28 (00:00) root pts/1 10.0.1.199 Apr 20 10:18 - 10:18 (00:00) root pts/1 10.0.1.199 Apr 20 10:08 - 10:08 (00:00) root pts/1 10.0.1.199 Apr 20 09:58 - 09:58 (00:00) root pts/1 10.0.1.199 Apr 20 09:47 - 09:47 (00:00) root pts/1 10.0.1.199 Apr 20 09:37 - 09:37 (00:00) root pts/1 10.0.1.199 Apr 20 09:27 - 09:27 (00:00) root pts/1 10.0.1.199 Apr 20 09:17 - 09:17 (00:00) root pts/1 10.0.1.199 Apr 20 09:07 - 09:07 (00:00) root pts/1 10.0.1.199 Apr 20 08:57 - 08:57 (00:00) root pts/1 10.0.1.199 Apr 20 08:46 - 08:46 (00:00) root pts/1 10.0.1.199 Apr 20 08:36 - 08:36 (00:00) root pts/1 10.0.1.199 Apr 20 08:26 - 08:26 (00:00) root pts/1 10.0.1.199 Apr 20 08:16 - 08:16 (00:00) root pts/1 10.0.1.199 Apr 20 08:06 - 08:06 (00:00) root pts/1 10.0.1.199 Apr 20 07:56 - 07:56 (00:00) root pts/1 10.0.1.199 Apr 20 07:45 - 07:45 (00:00) root pts/1 10.0.1.199 Apr 20 07:35 - 07:35 (00:00) root pts/1 10.0.1.199 Apr 20 07:25 - 07:25 (00:00)

通过对以上信息的分析，问题在于网卡en1的IP被人为改动所致

在以上出错信息中，9月3日的报错是因为重启HACMP的缘故，不是事故的原因。查以上信息，en1的IP应该在2007年7月16日以前被改动，具体改成什么IP，不可查知，但在9月3日出现故障时，可查知en1的IP被改为10.0.0.1（正常IP应是192.168.0.20）

故障原因分析：

因为en1的IP被改为与主网卡（en0）同一个A网段的地址，所以，网络会发生聚合-----就是该主机会把诸如10.10.20.X或10.30.40.X之类所有的地址全部当成是10.0.0.0/8网段的主机。所以，当其它网段(例如IP为10.20.222..29的终端)的TCP请求从10.10.20.40到达主机后，因为网络地址聚合的原理，该主机会认为从10.20.222..29发来的请求包是来自本地网，所以回包信息不会发给它的网关10.10.20.1，所以，到不同网段的TCP包也就不会被路由出去，而是在本局域网内传递（这就是为什么跨网段的终端不能访问到该主机，而同一局域网的小型机能访问该主机的原因）

最后，试图用smit tcpip改回en1的IP时，发现其IP设置是正确的（为192.168.0.20），因此推测出对en1的IP的改动是通过ifconfig en1 10.0.0.1 netmask 255.0.0.0 up命令动态实现的。直接用ifconfig将IP改回192.168.0.20，网络恢复正常。

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