Questions about using agr(4)

[Chris Ross <cross+netbsd%distal.com@localhost>]

  I have a Dell switch that while it doesn't support LACP, does  
support static link aggregation.  From reading the agr(4) man page, it  
looks like I should be able to set link1 on the agr interface, and it  
should work just fine.  First-step testing shows it does, although it  
also seems to also work without link1.  Anyone know why that is?

  The questions I have, many of which may've been asked before, are:

  1) Is there an "easier" way to remove addresses (in my case, the  
IPv6 link-local address) from the component interfaces beyond hard- 
coding it into an ifconfig.bge0 file (or, I guess, in rc.conf  
variables) ?  It just seems a shame to have to work that hard at that.
  2) My agr0 shows the capabilities of the underlying interfaces,  
including various checksum calculation offloading.  If I want to use/ 
enable and of these, should that be done to each and every underlying  
interface, or to the agr, or both?

  Thanks...

                             - Chris