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Old 02-04-2017, 09:04 AM   #1
netguy2000
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Registered: Oct 2003
Location: Karachi, PAKISTAN
Distribution: Redhat, Fedora, Open BSD, FreeBSD, SlackWare
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Question vlan interface issue


Dear Gurus,
I am in deep problem, which seem weird.
last time when I configured a linux router with Centos 6.8 and make vlan subinterfaces its works fine, but now on second machine when I installed centos 6.8 and try to configure vlan subinterfaces, I face problems, details are as.

main interface "eth0" , ifcfg file as,

DEVICE="eth0"
BOOTPROTO="none"
HWADDR="00:01:6C6:CE:A0"
NM_CONTROLLED="no"
ONBOOT="yes"
TYPE="Ethernet"
USRCTL=no
ARPCHECK=no

sub interface "eth0.1" tagged with VLAN file is as,

VLAN="yes"
DEVICE="eth0.1"
ONBOOT="yes"
NM_CONTROLLED="no"
BOOTPROTO="static"
IPADDR="192.168.8.15"
IPV4_FAILURE_FATAL="yes"
IPV6INIT="no"
NETMASK="255.255.252.0"
USRCTL="no"
ARPCHECK="no"

but when I configure this vlan interface my machine stop responding over network, neither network PC able to ping 192.168.8.15
Please help me in this problem, my old machine with same configuration works fine.
switch behind this machine having trunk is OK and interface attached with eth0 configured as trunk with allowed all vlans.

prompt response shall be highly appreciated.
 
Old 02-04-2017, 07:44 PM   #2
ferrari
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Can you show us the defined network interfaces?
Code:
/sbin/ifconfig -a
Then active interfaces only
Code:
/sbin/ifconfig
BTW vlan ID 1 is usually reserved/used for administrative purposes.
 
  


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