We have an IPv4 network on several sites, each having its own IPv4
subnet. We have set up a ISATAP "advertising router" on an old XP
machine. XP machines pick up from that for their Automatic Tunneling
Pseudo Interface IPv6 addresses of the form
2001:db8:0:10:0:5efe:192.168.X.Y where X identifies the site and Y the
machine

A first problem is that Vista machines do not pick up addresses of that
form (not visible in ipconfig /all) nor can they be pinged using them.
Any suggestion as to why the Vista machines are not setting up these
ISATAP addresses?

Ping works between XP machines between on the same site and from the
site with the ISATAP server to another site but not in the reverse
direction. The latter is curious because as I understand it once the
advertising router has given a workstation the prefix for the IPv6
tunneling address the router plays no further part - any actual packets
sent are IPv4 ones encapsultaing the IPv6 packet and so are routed
between sites using the IPv4 infrastucture.

Many thanks

James.


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James56
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