[P550]/ >#netstat -rn
Routing tables
Destination Gateway Flags Refs Use If Exp Groups

Route Tree for Protocol Family 2 (Internet):
default 192.0.0.253 UG 0 3858210 en0 – -
default 192.168.1.254 UG 0 23564 en2 – -
127/8 127.0.0.1 U 14 14363 lo0 – -
192.0.0.0 192.0.0.15 UHSb 0 0 en0 – - =
>
192.0.0/24 192.0.0.15 U 5 9129174 en0 – -
192.0.0.15 127.0.0.1 UGHS 2 7 lo0 – -
192.0.0.255 192.0.0.15 UHSb 0 4 en0 – -
192.168.1.0 192.168.1.8 UHSb 0 0 en2 – - =
>
192.168.1/24 192.168.1.8 U 0 4 en2 – -
192.168.1.8 127.0.0.1 UGHS 19 11138 lo0 – -
192.168.1.255 192.168.1.8 UHSb 0 4 en2 – -

只需删除其中一条无用的就可以，操作如下：

使用lsattr -EI inet0命令来查看服务器上的网络信息：

[P550]/ >#lsattr -El inet0
authm 65536 Authentication Methods
True
bootup_option no Use BSD-style Network Configurati
on True
gateway Gateway
True
hostname P550 Host Name
True
rout6 IPv6 Route
True
route net,-hopcount,0,,0,192.0.0.253 Route
True
route net,-hopcount,0,,0,192.168.1.254 Route
True

有两条默认路由(net,-hopcount开头)，通过chdev命令来删除其中一条，使服务器网络正常：

[P550]/ >#chdev -l inet0 -a delroute=”net,-hopcount,0,,0,192.168.1.254″
inet0 changed

再使用netstat -rn来查看网络信息：

[P550]/ >#netstat -rn
Routing tables
Destination Gateway Flags Refs Use If Exp Groups

Route Tree for Protocol Family 2 (Internet):
default 192.0.0.253 UG 0 3858210 en0 – -
127/8 127.0.0.1 U 14 14363 lo0 – -
192.0.0.0 192.0.0.15 UHSb 0 0 en0 – - =
>
192.0.0/24 192.0.0.15 U 5 9129174 en0 – -
192.0.0.15 127.0.0.1 UGHS 2 7 lo0 – -
192.0.0.255 192.0.0.15 UHSb 0 4 en0 – -
192.168.1.0 192.168.1.8 UHSb 0 0 en2 – - =
>
192.168.1/24 192.168.1.8 U 0 4 en2 – -
192.168.1.8 127.0.0.1 UGHS 19 11138 lo0 – -
192.168.1.255 192.168.1.8 UHSb 0 4 en2 – -

可以看出，只剩下了一条到192.0.0.253的默认网关，再去PING其它网段的服务器地址就正常了。如果想把下一跳地址改为192.0.0.254，则需要先将253的这条先删除：

[P550]/ >#chdev -l inet0 -a delroute=”net,-hopcount,0,,0,192.0.0.253″
inet0 changed

再添加一条至192.0.0.254的默认路由：

[P550]/ >#chdev -l inet0 -a route=”net,-hopcount,0,,0,192.0.0.254″
inet0 changed