John Plocher writes:
> James Carlson wrote:
> > Renaming a driver is a serious pain. 
> 
> Are they changing a driver name or are they simply changing the
> network device they are using?  Yes they are similar things...

There's really no difference in terms of networking configuration
breakage.

> This is a common enuf task on systems with multiple network interfaces
> that there should be some easy (easier?) way to do this - changing from
> qfe2 to qfe3 for my sunray network at home didn't require all that pain...

Sure.  For trivial cases, it's not too hard to get it right or to
"luck into" a working configuration.  However, the names of network
interfaces (including, yes, "qfe2") are administrative units that are
available to and used by *dozens* of applications and configuration
components throughout the system.

When you change one, there simply are no tools (other than perhaps
find/xargs/grep -- good luck if you have configuration systems based
on something other than plain text files) that can help you deal with
the aftermath.  You have to "remember" where you or any other
administrator or user of the system may have used the name.

That's why I referenced the previous ipge case.  It's the same
inherent problem that caused us to deny that case.

Yes, vanity naming solves the problem pretty neatly.  No, vanity
naming doesn't exist yet and this case isn't dependent on it.  The
best we can do is to warn users that such a name change is *in the
general case* infeasible.

-- 
James Carlson, Solaris Networking              <james.d.carlson at sun.com>
Sun Microsystems / 35 Network Drive        71.232W   Vox +1 781 442 2084
MS UBUR02-212 / Burlington MA 01803-2757   42.496N   Fax +1 781 442 1677

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