Hello. See the upgrade path below. First apply the BIOS and then the respective DRAC6 firmware. BIOS 6.2.3                   iDRAC6  v1.92 BIOS 6.3.0                   iDRAC6 v1.95 BIOS 6.4.0                   iDRAC6 v1.97, iDRAC6 v1.99 and lastly iDRAC6 v2.8.0 The update path will prevent iDRAC communication and other server issues. 
I am temporarily taking care of a Dell PowerEdge T610 purchased back in 2012.  Our outsourced IT department was walking me through some maintenance tasks, one of which required launching a Virtual Console through iDRAC6. Apparently my version of iDRAC6 (V1.80) is so old no modern browser fully supports it. What I have mostly works with Chrome and FireFox, not at all with IE (but that's OK - I don't work with IE either).  I am trying to determine if a firmware upgrade path exists for my hardware, and if so, what is involved. None of my searches on the Dell website have relevant results. Since my system is out of warranty I'm not getting much help via telephoning, and "chat" is denied to me as well. If someone can point me to a good place to get started that would be a big help.  Thanks!
IDRAC6 upgrade path