我有一个使用Nagios的CentOS 6机器。 其Dell PowerEdge服务器不在保修范围内，并具有2个板载网卡和2个以上的网卡。 它已经运行了好几个月的Nagios，工作正常。 第二对是不活动的，两个机载正在运行。
最近我从eesensors.com拥有一个水/温度/光线传感器，插入一个NIC并与Nagios兼容。 我编译了Nagios插件，将它连接到第二个NIC之一，根据看起来合适的（*）configuration“ifcfg-p3p1”并运行“ifup-p3p1”。
此时，'ifconfig'显示新的端口和数据包通过。 还会发生什么，原来的端口似乎停止工作。 Apache不响应，Nagios报告每个testing的错误。 我仍然可以通过SSH与服务器通信。 要解决这个问题，我必须重新启动networking，它启动eth1而不是p3p1。
所以 –
- 我在提出这个额外的港口时做错了什么？
- 为什么即使SSH工作，我的HTTPD等服务也会停止响应？ 我会想，如果网卡是closures，然后用SSH与它。
ifcfg-p3p1: DEVICE=p3p1 HWADDR=00:0E:0C:xx:xx:xx ONBOOT=no BOOTPROTO=static IPADDR=192.168.0.1 NETMASK=255.255.255.0 GATEWAY=192.168.0.2 ifcfg-eth1: DEVICE="eth1" HWADDR="00:14:22:xx:xx:xx" NM_CONTROLLED="yes" ONBOOT="yes" IPADDR=10.127.24.21 GATEWAY=10.127.24.1 NETMASK=10.127.254.0 NETWORK=10.127.24.0 TYPE=ETHERNET [root@orange network-scripts]# ip addr 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: eth0: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast state DOWN qlen 1000 link/ether 00:14:22:13:b7:f3 brd ff:ff:ff:ff:ff:ff 3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 00:14:22:13:b7:f4 brd ff:ff:ff:ff:ff:ff inet 10.127.24.21/23 brd 10.127.25.255 scope global eth1 inet6 fe80::214:22ff:fe13:b7f4/64 scope link valid_lft forever preferred_lft forever 4: p3p1: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast state DOWN qlen 1000 link/ether 00:0e:0c:71:82:ae brd ff:ff:ff:ff:ff:ff 5: p3p2: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast state DOWN qlen 1000 link/ether 00:0e:0c:71:82:af brd ff:ff:ff:ff:ff:ff [root@orange network-scripts]# ip route 10.127.24.0/23 dev eth1 proto kernel scope link src 10.127.24.21 169.254.0.0/16 dev eth1 scope link metric 1003 default via 10.127.24.1 dev eth1 [root@orange network-scripts]# ifup p3p1 [root@orange network-scripts]# ip addr 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: eth0: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast state DOWN qlen 1000 link/ether 00:14:22:13:b7:f3 brd ff:ff:ff:ff:ff:ff 3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 00:14:22:13:b7:f4 brd ff:ff:ff:ff:ff:ff inet 10.127.24.21/23 brd 10.127.25.255 scope global eth1 inet6 fe80::214:22ff:fe13:b7f4/64 scope link valid_lft forever preferred_lft forever 4: p3p1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 00:0e:0c:71:82:ae brd ff:ff:ff:ff:ff:ff inet 192.168.0.1/24 brd 192.168.0.255 scope global p3p1 inet6 fe80::20e:cff:fe71:82ae/64 scope link valid_lft forever preferred_lft forever 5: p3p2: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast state DOWN qlen 1000 link/ether 00:0e:0c:71:82:af brd ff:ff:ff:ff:ff:ff [root@orange network-scripts]# ip route 192.168.0.0/24 dev p3p1 proto kernel scope link src 192.168.0.1 10.127.24.0/23 dev eth1 proto kernel scope link src 10.127.24.21 169.254.0.0/16 dev eth1 scope link metric 1003 169.254.0.0/16 dev p3p1 scope link metric 1004 default via 192.168.0.2 dev p3p1 删除这一行：
GATEWAY=192.168.0.2
那里没有门户！
如果您指定一个实际上不是网关的IP地址作为网关，则任何需要使用网关的服务都将中断。