김효원, Swindler, coolx 님의 홈페이지

Computer ???

No.

444

Name.

swindler

Subject.

Private Lan 구성

Main Cate.

Linux

Sub Cate.

Date.

2013-11-29 15:35

Hit.

2882 (211.36.27.3)

File.

서버 2대를 secondary NIC를 설치하여 내부망을 구성하는 방법

Server #1
cat ifcfg-em1
DEVICE=em1
HWADDR=78:2b:cb:00:f5:40
TYPE=Ethernet
UUID=c0f9639a-5255-479d-84ad-c874f341cc4d
ONBOOT=yes
NM_CONTROLLED=yes
BOOTPROTO=none
IPADDR=209.190.94.114
NETMASK=255.255.255.248
GATEWAY=209.190.94.113
DNS1=209.190.74.89
IPV6INIT=no
USERCTL=no

cat ifcfg-em2
DEVICE=em2
HWADDR=78:2B:CB:00:F5:41
TYPE=Ethernet
UUID=f176e2d1-857e-4ab1-80dc-f1ec30e8d633
ONBOOT=yes
NM_CONTROLLED=yes
BOOTPROTO=none
IPV6INIT=no
USERCTL=no
NETMASK=255.255.255.0
IPADDR=192.168.0.114

route -n 으로 조회를 해 보면 다음과 같이 알아서 세팅되어 있다.
route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
209.190.94.112 0.0.0.0 255.255.255.248 U 0 0 0 em1
192.168.0.0 0.0.0.0 255.255.255.0 U 0 0 0 em2
169.254.0.0 0.0.0.0 255.255.0.0 U 1002 0 0 em1
169.254.0.0 0.0.0.0 255.255.0.0 U 1003 0 0 em2
0.0.0.0 209.190.94.113 0.0.0.0 UG 0 0 0 em1

Server #2
cat ifcfg-eth0
# Broadcom Corporation NetXtreme BCM5720 Gigabit Ethernet PCIe
DEVICE=eth0
BOOTPROTO=none
HWADDR=d4:ae:52:8e:59:9d
ONBOOT=yes
NETMASK=255.255.255.240
IPADDR=209.190.93.210
GATEWAY=209.190.93.209
TYPE=Ethernet

cat ifcfg-eth1
# Broadcom Corporation NetXtreme BCM5720 Gigabit Ethernet PCIe
DEVICE=eth1
BOOTPROTO=none
HWADDR=d4:ae:52:8e:59:9e
ONBOOT=yes
NETMASK=255.255.255.0
IPADDR=192.168.0.210
TYPE=Ethernet

route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
209.190.93.208 0.0.0.0 255.255.255.240 U 0 0 0 eth0
192.168.0.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth1
0.0.0.0 209.190.93.209 0.0.0.0 UG 0 0 0 eth0

/etc/rc.d/init.d/network eth1 up 과 같이 실행하면
IP가 잡히지 않는데,
ifup eth1 로 실행하면 정상적으로 IP가 잡힌다.

secondary NIC에 GATEWAY를 설정하게 되면
전체 네트웍이 정상적으로 작동하지 않을 수 있다.

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