I was browsing blogs this evening looking for administrative information on the Sun Fire X2400 (our new Burlington lab router), and ran into Ben Rockwood's blog:
http://www.cuddletech.com/blog/pivot/entry.php?id=809 Note the bit about having to migrate zones between X4100s (which have four e1000g's) to X4200s (which have two nge's and two e1000g's), and having to modify the networking configuration on the migrated zone to take the two nge's into account. -Seb
