Aug 052010
 

source: http://www.atoomnet.net/ipv62002.php

2 easy steps to make IPv6 work without a tunnel broker.

The technique used to make this work is called 6to4. You use a computer of somebody else to put your IPv6 traffic on the very big IPv6 network.

Okay, lets make things work:

Step 1

type this on your console to activate IPv6:

# /sbin/ip tunnel add tun6to4 mode sit ttl 64 remote any local 202.127.98.148
# /sbin/ip link set dev tun6to4 up
# /sbin/ip -6 addr add 2002:ca7f:6294::/16 dev tun6to4
# /sbin/ip -6 route add 2002::/3 via ::192.88.99.1 dev tun6to4 metric 1

Explanation: 202.127.98.148 is your ip adress from your internet provider. It is used to calculate a special part of the 2002:ca7f:6294::/16 IPv6 address as you see above. Your ip address is converted into hex and inserted as the ca7f:6294 part in this 2002: thingy.
Your IPv6 adress on the very big IPv6 network is now: 2002:ca7f:6294::

Step 2

Test your fresh IPv6 connection.
Type ping6 -nc4 www.ipv6.org in your linux console. It should say something like this:

# ping6 -nc4 www.ipv6.org
PING www.ipv6.org(2001:6b0:1:ea:a00:20ff:fe8f:708f) 56 data bytes
64 bytes from 2001:6b0:1:ea:a00:20ff:fe8f:708f: icmp_seq=1 ttl=241 time=90.7 ms
64 bytes from 2001:6b0:1:ea:a00:20ff:fe8f:708f: icmp_seq=2 ttl=241 time=97.4 ms
64 bytes from 2001:6b0:1:ea:a00:20ff:fe8f:708f: icmp_seq=3 ttl=241 time=91.4 ms
64 bytes from 2001:6b0:1:ea:a00:20ff:fe8f:708f: icmp_seq=4 ttl=241 time=89.4 ms

Congrats if you seen no errors, you now have a working IPv6 connection. Do something usefull with it.

Aug 052010
 

source: http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1013234

Details

In many Linux distributions if IPv6 is enabled, VMware Tools cannot be configured with vmware-config-tools.pl after installation. In this case, VMware Tools is unable to set the network device correctly for the virtual machine, and displays a message similar to the following:

Unloading pcnet32 module
unregister_netdevice: waiting for eth0 to become free

This message repeats continuously until you reboot the virtual machine. To prevent this problem in virtual machines running Linux, disable IPv6 before installing VMware Tools.

Note: VMware ESX 4.0 and later versions support IPv6. You do not need to disable IPv6 before installing VMware Tools.

Solution

Most Linux Systems:
To disable IPv6 in a virtual machine running Linux

  • If the /etc/sysconfig/network file contains the line NETWORKING_IPV6=yes, change the line to the
NETWORKING_IPV6=no
  • In the file /etc/modules.conf, add the following lines:
alias ipv6 off
alias net-pf-10 off

Ubuntu Systems:
To disable IPv6 in a virtual machine running Ubuntu
Log on as root or superuser.

  • If the /etc/modprobe/aliases file change the following line :
alias net-pf-10 ipv6

to

alias net-pf-10 off
  • Save the file and reboot the system.

After you disable IPv6, you should be able to install and configure VMware Tools successfully.