> Am I missing something here, or are we changing the 
> definition/expected use of 'deprecated address' here?  
> Previously, I think, it was very clearly not to be used as a 
> source address, to be phased out when connections using it die off.

No, this is not a change. Using a deprecated source address is clearly
discouraged. It's one of the high priority rules in source address
selection.

As I said earlier, in normal operation you should have available a
preferred address of the correct scope. If for some reason one is not
available (probably indicating a configuration error in the site), then
the host much choose the lesser of two evils (using a deprecated address
or using an address of mismatched scope).

Does anyone else think that the order of these two rules should be
reversed, so that choosing a non-deprecated source address is more
important than choosing a source address of the appropriate scope?

Rich

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