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====== IPv6 address mechanims in NAV ====== | ====== IPv6 address mechanims in NAV ====== | ||
- | [[http://www.uninett.no/|UNINETT]] has made available statistics on the number of IPv6 addresses in active use by the | + | [[http://www.uninett.no/|UNINETT]] has made available statistics on the number of IPv6-active hosts in the |
- | Norwegian universities and university collages. | + | Norwegian universities and university colleges. |
- | [[https://ow.feide.no/gigacampus:ipv6status|The statistics are available online (in Norwegian)]]. The basis for the statistics | + | [[https://ow.feide.no/gigacampus:ipv6status_english|The statistics are available online]]. |
- | is data collected by NAV (Network | + | The basis for the statistics is data collected by NAV (Network Administration Visualized). |
- | Administration Visualized). This document describes the system in use by NAV | + | |
- | 3.5 (but being improved in 3.6). | + | |
===== Data structures ===== | ===== Data structures ===== | ||
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First defined in RFC 1213, later revised in RFC 4293. | First defined in RFC 1213, later revised in RFC 4293. | ||
- | IPv4 address mappings are collected from ipNetToMediaTable. This table has | + | IPv4 address mappings are collected from ''ipNetToMediaTable''. This table has |
been deprecated in the revised IP-MIB. The revised MIB contains | been deprecated in the revised IP-MIB. The revised MIB contains | ||
- | ipNetToPhysicalTable, which maps both IPv4 and IPv6 addresses, but | + | ''ipNetToPhysicalTable'', which maps both IPv4 and IPv6 addresses. (:!: NAV versions prior to 3.6 did not support the revised table) |
- | unfortunately, NAV 3.5 does not support this table. | + | |
==== IPv6-MIB ==== | ==== IPv6-MIB ==== | ||
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deprecated. Still in use by several vendors, though. | deprecated. Still in use by several vendors, though. | ||
- | IPv6 address mappings are collected from ipv6NetToMediaTable. | + | IPv6 address mappings are collected from ''ipv6NetToMediaTable''. |
==== CISCO-IETF-IP-MIB ==== | ==== CISCO-IETF-IP-MIB ==== | ||
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(finally published in RFC 4293). | (finally published in RFC 4293). | ||
- | IPv6 address mappings are collected from cInetNetToMediaTable. | + | IPv6 address mappings are collected from ''cInetNetToMediaTable''. |
===== Algorithm ===== | ===== Algorithm ===== | ||
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Statistics on IPv6 usage are obtained by examining NAVs ARP database table. | Statistics on IPv6 usage are obtained by examining NAVs ARP database table. | ||
- | The number of active IP addresses of each address family (v4, v6) at any given | + | The number of active IP addresses of each address family (v4, v6), and the number of unique MAC addresses in use at any given |
time can be extracted from this table and used to create aggregate statistics | time can be extracted from this table and used to create aggregate statistics | ||
- | across [[https://ow.feide.no/gigacampus:ipv6status|a number of NAV installations in the Norwegian NREN]]. | + | across [[https://ow.feide.no/gigacampus:ipv6status|a number of NAV installations in the Norwegian NREN]]. The numbers in UNINETT's published graphs count the number of unique MAC addresses seen, so users employing IPv6 privacy extensions should only be counted once per institution. |
===== Machine Tracker ===== | ===== Machine Tracker ===== | ||
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If you would like to implement your own solution for IPv6 deployment statistics, easiest way to go is first to install | If you would like to implement your own solution for IPv6 deployment statistics, easiest way to go is first to install | ||
- | NAV. Alternatively you could implement your own IPv6 SNMP collection scheme based on the ipv6NetToMediaTable. For | + | NAV. Alternatively you could implement your own IPv6 SNMP collection scheme based on the ''ipv6NetToMediaTable''. For |
- | code details, do not heisitate to contact the NAV team at [[https://postlister.uninett.no/sympa/info/nav-users|nav-users]]. | + | code details, please contact the NAV team at [[https://sympa.uninett.no/lists/uninett.no/info/nav-users|nav-users]]. |