Overview
- Almost all networks on campus will provide you with an auto-configured global IPv6 address. Virginia Tech’s global prefixes are 2001:468::c80::/48 and 2607:b400::/32. If you have an interface with an address that begins with one of these prefixes, you should have IPv6 connectivity.
- http://ipv6-test.cns.vt.edu/ will show you if you are connecting with IPv6.
- Prefixes beginning with 2002:: are 6to4, an automatic tunneling method. In general, you should not be using these prefixes and should not see them anywhere near the VT end of a traceroute.
Resolvers
All of the campus DNS resolvers support IPv6. Visit the DNS Resolver Knowledge Base article for more information.
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DNS Resolver
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Address
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yardbird.cns.vt.edu
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2001:468:c80:2101:0:100:0:22
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jeru.cns.vt.edu
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2001:468:c80:4101:0:100:0:42
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milo.cns.vt.edu
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2001:468:c80:6101:0:100:0:62
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General
- The address record for an IPv6 address is type AAAA (said as "quad A").
- Tools (such as dig) that lookup addresses do not necessarily return the AAAA record unless you specifically ask for it.
- Network liaisons can send mail to hostmaster requesting that IPv6 addresses be put in the name server. These are handled with the new CSV format (see the Network Liaison Guide).
Sub-Domains
- The IPv6 address reverses to host.dept.ipv6.vt.edu and a forward record is added automatically.
- Use of the .ipv6.vt.edu address assures connection is via IPv6 - there are no A records in this zone.
- We can also add a host.dept.ipv4.vt.edu record which only returns the IPv4 address when you need to connect with IPv4.
ipv6-test.vt.edu
- This is a test zone and should not be used for production use.
- This zone contains A, AAAA, and A6 records for each host name.