We needed to take one physical server down, but that takes down several interfaces, including
vsp07, vsp07v, vsp07b, vsp17, vsp17v, vsp22, vsp22v
The machine is fscking now, so it may take a few hours for it to come back.
UPDATE 7am PST Apr 28 2010: This machine is still down and may be having trouble coming back from its restart. We will know more when the sysadmins report on this later today.
UPDATE 2pm PST Apr 28 2010: This issue is now resolved.