aix 删除多余默认网关
错误信息：
安装crs时跑脚本报错
[root@aix229:/]#/u01/crs_1/root.sh
WARNING: directory '/u01' is not owned by root
Checking to see if Oracle CRS stack is already configured
Checking to see if any 9i GSD is up
/etc/oracle does not exist. Creating it now.
Setting the permissions on OCR backup directory
Setting up NS directories
Oracle Cluster Registry configuration upgraded successfully
WARNING: directory '/u01' is not owned by root
Successfully accumulated necessary OCR keys.
Using ports: CSS=49895 CRS=49896 EVMC=49898 and EVMR=49897.
node <nodenumber>: <nodename> <private interconnect name> <hostname>
node 1: aix229 aix229-priv aix229
node 2: aix230 aix230-priv aix230
Creating OCR keys for user 'root', privgrp 'system'..
Operation successful.
Now formatting voting device: /dev/rrac_vote1
Format of 1 voting devices complete.
Startup will be queued to init within 30 seconds.
Adding daemons to inittab
Adding daemons to inittab
Expecting the CRS daemons to be up within 600 seconds.
Failure at final check of Oracle CRS stack.
10
出错原因：
检查以后发现，en0（192.168.8.230）默认网关是10.10.10.1，所以造成无法通信。进一步检查发现主机设有多个默认网关。AIX中配置了多条的默认网关，会造成网络不稳定(例如时断时好)。
解决方法：
1、查看当前默认网关
如果用route命令（或smitty route)去删除，下次重启后，又会回来；所以要从ODM里删除。
[root@aix230:/]#netstat -nr
Routing tables
Destination Gateway Flags Refs Use If Exp Groups
Route tree for Protocol Family 2 (Internet):
default 192.168.8.1 UG 0 0 en0 - -
default 10.10.10.1 UG 0 0 en1 - -
default 10.10.10.1 UG 0 0 en1 - -
10.10.10.0 10.10.10.230 UHSb 0 0 en1 - - =>
10.10.10/24 10.10.10.230 U 0 1 en1 - -
10.10.10.230 127.0.0.1 UGHS 0 1 lo0 - -
10.10.10.255 10.10.10.230 UHSb 0 4 en1 - -
127/8 127.0.0.1 U 13 247 lo0 - -
192.168.8.0 192.168.8.230 UHSb 0 0 en0 - - =>
192.168.8/24 192.168.8.230 U 4 42 en0 - -
192.168.8.230 127.0.0.1 UGHS 0 1 lo0 - -
192.168.8.255 192.168.8.230 UHSb 0 4 en0 - -
Route tree for Protocol Family 24 (Internet v6):
::1 ::1 UH 0 0 lo0 - -
2、查看ODM信息
[root@aix230:/]#lsattr -El inet0
authm 65536 Authentication Methods True
bootup_option no Use BSD-style Network Configuration True
gateway Gateway True
hostname aix230 Host Name True
rout6 IPv6 Route True
route net,-hopcount,0,,0,192.168.8.1 Route True
route net,-hopcount,0,,0,10.10.10.1 Route True
route net,-hopcount,2,,0,10.10.10.1 Route True
[root@aix230:/]#odmget -q "name=inet0" CuAt
CuAt:
name = "inet0"
attribute = "hostname"
value = "aix230"
type = "R"
generic = "DU"
rep = "s"
nls_index = 24
CuAt:
name = "inet0"
attribute = "route"
value = "net,-hopcount,0,,0,10.10.10.1"
type = "R"
generic = "DU"
rep = "s"
nls_index = 0
CuAt:
name = "inet0"
attribute = "route"
value = "net,-hopcount,0,,0,192.168.8.1"
type = "R"
generic = "DU"
rep = "s"
nls_index = 0
CuAt:
name = "inet0"
attribute = "route"
value = "net,-hopcount,2,,0,10.10.10.1"
type = "R"
generic = "DU"
rep = "s"
nls_index = 0
标红的为多余网关。
3、逐条删除没用的默认路由
[root@aix230:/]#chdev -l inet0 -a delroute="net,-hopcount,2,,0,10.10.10.1"
inet0 changed
4、确认生效
[root@aix230:/]#odmget -q "name=inet0" CuAt
CuAt:
name = "inet0"
attribute = "hostname"
value = "aix230"
type = "R"
generic = "DU"
rep = "s"
nls_index = 24
CuAt:
name = "inet0"
attribute = "route"
value = "net,-hopcount,0,,0,192.168.8.1"
type = "R"
generic = "DU"
rep = "s"
nls_index = 0
[root@aix230:/]#netstat -nr
Routing tables
Destination Gateway Flags Refs Use If Exp Groups
Route tree for Protocol Family 2 (Internet):
default 192.168.8.1 UG 0 0 en0 - -
10.10.10.0 10.10.10.230 UHSb 0 0 en1 - - =>
10.10.10/24 10.10.10.230 U 0 1 en1 - -
10.10.10.230 127.0.0.1 UGHS 0 1 lo0 - -
10.10.10.255 10.10.10.230 UHSb 0 4 en1 - -
127/8 127.0.0.1 U 13 247 lo0 - -
192.168.8.0 192.168.8.230 UHSb 0 0 en0 - - =>
192.168.8/24 192.168.8.230 U 4 42 en0 - -
192.168.8.230 127.0.0.1 UGHS 0 1 lo0 - -
192.168.8.255 192.168.8.230 UHSb 0 4 en0 - -
Route tree for Protocol Family 24 (Internet v6):
::1 ::1 UH 0 0 lo0 - -