Re: virtual network

Wed, 13 Jul 2011 11:08:38 -0700 

On 07/12/2011 06:36 PM, Yasha Karant wrote:
I attempted to add the virtual network interface you suggested with simply the ifcfg-eth0.5 script you provided; however, the system would not generate it. I then found a reference to a command vconfig that I used (please see below) that did work and created a eth0.5 after ifup using your script. However, this caused the machine not be visible on the physical network -- netstat -r did not find default. I tried ping, etc. A reboot with the ifcfg-eth0.5 script moved to my home directory (so that it would not be used but not lost) resulted in a working Internet connection, but no eth0.5 . 

Any further suggestion?

Thanks,

Yasha Karant

[root@jb344 network-scripts]# vconfig add eth0 5

WARNING:  Could not open /proc/net/vlan/config.  Maybe you need to 
load the 8021q module, or maybe you are not using PROCFS??

Added VLAN with VID == 5 to IF -:eth0:-
[root@jb344 network-scripts]# ./ifup eth0.5
[root@jb344 network-scripts]# ifconfig -a
eth0      Link encap:Ethernet  HWaddr 6C:62:6D:B3:EB:04

          inet addr:139.182.151.44  Bcast:139.182.255.255 
Mask:255.255.255.0

          inet6 addr: fe80::6e62:6dff:feb3:eb04/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:7740 errors:0 dropped:15 overruns:0 frame:0
          TX packets:7745 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:5712610 (5.4 MiB)  TX bytes:1292931 (1.2 MiB)
          Interrupt:50 Base address:0x6000

eth0.5    Link encap:Ethernet  HWaddr 6C:62:6D:B3:EB:04

          inet addr:192.168.254.10  Bcast:192.168.254.255 
Mask:255.255.255.0

          inet6 addr: fe80::6e62:6dff:feb3:eb04/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:79 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)


ifcfg-eth0.5

DEVICE=eth0.5
BOOTPROTO=none
BROADCAST=192.168.254.255
IPADDR=192.168.254.10
NETMASK=255.255.255.0
NETWORK=192.168.254.0
GATEWAY=192.168.254.10
ONBOOT=yes
USERCTL=yes
IPV6INIT=no
PEERDNS=no
PROMISC=yes
# TYPE=Ethernet
VLAN=YES
NAME=vbox-bridged







Yasha,

This is the article I originally used to create my VLANs:
http://www.cyberciti.biz/tips/howto-configure-linux-virtual-local-area-network-vlan.html

I am not find anything I missed.  But, it is much better written
than my stuff, so it should be worth reviewing.  If you find something
I missed, please let me know.

-T






















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