Interim Policy proposal for IPv6 Address Assignment Policy for Internet Exchange Points

On Fri, 31 Aug 2001, Gert Doering wrote:
> On Fri, Aug 31, 2001 at 03:58:04PM +0300, Pekka Savola wrote:
> > Care to explain how traceroute through these IX's is supposed to work, if
> > the node performing traceroute, ping, or whatever, is not a small-scale
> > customer (ie. default route) of the IX participants?
>
> For a traceroute *through* the IX you don't need the route to that /64.
> It might get filtered if you do RPF filtering (but multihomed customers
> usually don't, because it doesn't work), but reachability of the hosts
> *behind* the IX is not a problem.

RPF is an additional issue, granted, but not the point here.

Traceroute will skip a hop or two, ie. those p-t-p links where these
internal addresses are used; these might be crucial when debugging or
tracing where the traffic goes.

This might make (depending on the topology) a 15 second wait for the magic
'* * *' combination.

After and before these, it will continue in a normal fashion.  But boy,
would this be annoying..

> Whether it's desireable to be able to traceroute *to* an IX address is
> debateable (but that's not different from today), this is what wouldn't
> work.

Different from today how?  Not necessarily.  One can use global addresses
where you can traceroute to without problems.

-- 
Pekka Savola                 "Tell me of difficulties surmounted,
Netcore Oy                   not those you stumble over and fall"
Systems. Networks. Security.  -- Robert Jordan: A Crown of Swords