Centos7 버전대에서는 네트웍이 한개 딱 잡혔는데

6버전대로 내려왔더니 eth 0~5까지 잡혀있으면서 eth2 일도 3일도 있습니다.

dhcp 로하면 문제없이 되는데 static 으로 설정하는순간 

service network restart

Determining if ip address 172.30.1.21 is already in use for device eth2... 가 나옵니다.

6.4 6.7 6.9 에서 다그렇습니다.

랜카드도 한개인데..

[root@localhost src]# lspci -v | grep Ether

03:00.0 Ethernet controller: Broadcom Limited NetXtreme BCM5719 Gigabit Ethernet PCIe (rev 01)

        Subsystem: Hewlett-Packard Company Ethernet 1Gb 4-port 331FLR Adapter

03:00.1 Ethernet controller: Broadcom Limited NetXtreme BCM5719 Gigabit Ethernet PCIe (rev 01)

        Subsystem: Hewlett-Packard Company Ethernet 1Gb 4-port 331FLR Adapter

03:00.2 Ethernet controller: Broadcom Limited NetXtreme BCM5719 Gigabit Ethernet PCIe (rev 01)

        Subsystem: Hewlett-Packard Company Ethernet 1Gb 4-port 331FLR Adapter

03:00.3 Ethernet controller: Broadcom Limited NetXtreme BCM5719 Gigabit Ethernet PCIe (rev 01)

        Subsystem: Hewlett-Packard Company Ethernet 1Gb 4-port 331FLR Adapter

04:00.0 Ethernet controller: Intel Corporation I350 Gigabit Network Connection (rev 01)

        Subsystem: Hewlett-Packard Company Ethernet 1Gb 2-port 361T Adapter

04:00.1 Ethernet controller: Intel Corporation I350 Gigabit Network Connection (rev 01)

        Subsystem: Hewlett-Packard Company Ethernet 1Gb 2-port 361T Adapter

이렇게 뜨네요.. 저는 랜선 꼽는곳이 4포트 짜리입니다. 

후 이거때문에 몇시간째 해매네요;;