Announcing Tunneldiscovery - RIPE NCC's IPv6 Tunnel Detection Tool

 
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[Apologies for duplicate emails]


Dear All,


RIPE NCC is pleased to announce the Tunneldiscovery Tool:
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Today, many IPv6 networks are based on tunnels. Traceroute6 is one of
many tools used to assess route vectors and latency. However, IPv6
tunneling undermines the validity of Traceroute6 because it only
delivers results based on the IPv6, and not the IPv4, layer.

The Tunneldiscovery Tool allows users to detect an IPv6 tunnel by
measuring the MTU size [RFC 1981] over an entire path and displaying
it in a table. In the case of IPv6 tunneling, the MTU size will be
decremented by the size of the IPv4 header. If the MTU value between
source and destination does not amount to 1500 bytes, which is the
normal value for our Ethernet connected test boxes, it could indicate
the presence of at least one tunnel in the path. For more
information, go to the following URL:
http://www.ripe.net/ttm/Plots/pmtu/description.html.

The Tunneldiscovery Tool is available at URL:
http://www.ripe.net/ttm/Plots/pmtu/tunneldiscovery.cgi

Disclaimer: The status of this tool is experimental, which implies
that results may sometimes be inaccurate.

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Please send bug reports and comments to ttm at ripe.net


Best regards,
On behalf of the TTM team,

Michael Swoboda & Matthew Williams

 ---
> Matthew Williams (MW243-RIPE)
> Customer Liaison Engineer
> RIPE NCC - http://www.ripe.net/np/

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