Sunday, June 22, 2008

IPv6: Ping

Linux -vs- Windows

Given a LAN with Windows and Linux systems running IPv6, it may be necessary to Ping a Link Local interface. Consider the output of a Linux ifconfig command:
Only one address is displayed on the FE80 subnet. In this case we would issue:
  ping6 -I eth0 FE80::250:56ff:fea7:54a7
Notice the -I eth0 option: this tells the system which interface to use.

On the Windows side, things are slightly different:
This time we have three FE80 addresses. To ping we issue:
ping fe80::250:56ff:fea7:d33%6
Notice the %6 on the end. This allows Windows to know which interface (or tunnel) to use.

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