Re: [homenet] sorting out the right ipv6 addr to choose and name in a source specific world

[Juliusz Chroboczek <[e-mail]>]

>>> You might also need to combine the features of the gateway with the
>>> metric(s) of the path to the gateway.

>> I do end-to-end measurements in my mosh implementation, so we should
>> not have the problem.

> Does this really scale well?

How well do we need it to scale?  Three addresses per host?  A dozen?
A hundred?  (Per host, mind you -- not per router.)

The probes Matthieu's code is sending are less than 90 bytes each.  This
means that if the client and the server have three addresses each, each
probing episode consists of a burst of 9 packets totalling less than one
full Ethernet frame.  (18 if you count the replies.)

On the other hand, if we end up having hundreds of addresses on every
host, the strategy will need to be rethought.  Dave is currently playing
with a network where each host has 10 addresses of different kinds, and
he's trying to work out heuristics to limit the number of probes.  I'd
personally prefer to gather some empirical data before we start optimising
things.

-- Juliusz