HP 2408 Converged switch reporting 8 classes over DCBX when configured for 2

[TJNII]

I'm having a problem with a HP 2408 (rebranded Brocade 8000) converged network switch.  I am trying to conenct the 2408 to a HP Procurve 6120XG CEE enabled blade switch to connect CNA mezzanine cards.  However, I am only able to get the two switches to work with CEE when I have the 6120 in 8-queue mode.  Then I put the switch in 2-queue mode (which the Emulex CNAs require) I get the following error on the 6120XG:

I 07/17/12 19:06:44 00076 ports: port 18 is now on-line
I 07/17/12 19:06:44 03236 DCBX: port 18 minor mismatch(Number of Traffic Classes).

This is despite having only 2 queues configured on the 2408:

swd77(config)#do show cee maps mondavi

CEE Map mondavi
   Precedence 1
   Priority Group Table
     0:  Weight 20, PFC Disabled, TrafficClass 6, BW% 20
     1:  Weight 80, PFC Enabled, TrafficClass 3, BW% 80
     15.0: PFC Disabled
     15.1: PFC Disabled
     15.2: PFC Disabled
     15.3: PFC Disabled
     15.4: PFC Disabled
     15.5: PFC Disabled
     15.6: PFC Disabled
     15.7: PFC Disabled
   Priority Table
      CoS:    0    1    2    3    4    5    6    7
     ---------------------------------------------
     PGID:    0    0    0    1    0    0    0    0
   FCoE CoS: 3
   Enabled on the following interfaces
     Te 0/2

Can I configure the 2408 to only use 2 queues?  Does the 2408 have a command similar to the Mondavi "qos queue-config 2-queues" command?

[TJNII · Accepted solution]

This turned out to be a red herring.  This error does not block FCoE traffic.  My real issue was that I was missing jumbo frames on my 6120 FCoE VLAN.

Also note that this is an unsupported configuration.  We went with another switch because of this.  While I did get it working, I performed no stress or long term tests with this switch combo.