There are lots of appends about this- loading a MIB doesn't configure
the trap in trapd.conf.  To add a single trap, use xnmtrap, or bring it
up Options->Event configuration-> Trap customization and add it
manually.  The cisco traps that come with V6 seem to have onle Specific
1 & 2 for this enterprise, so you'll probably just have to add it. 
There are also ways to load multiple traps (documentation has details).

Hope this helps.

Vergakis Costas wrote:
> 
> Hi all,
> i wonder if anyone could help me with this.
> 
> I have loaded the following MIBs and the related traps:
> cisco-isdn-mib-v1smi.my
> cisco-isdnu-if-mib-v1smi.my
> 
> But, in spite of this, i'm getting the following unknown trap:
> Enterprise: ciscoIsdnMibTrapPrefix (1.3.6.1.4.1.9.9.26.2)
> generic: 6 specific: 3 args(2):
> [1] mgmt.mib-2.interfaces.ifTable.ifEntry.ifIndex.3 (Integer): 3
> [2] mgmt.mib-2.transmission.20.1.3.4.1.2.3 (Integer): 2
> 
> NetView 6.0.1 Framework 3.6.2 Solaris 2.6
> 
> I'd appreciate any hints
> TIA
> 
> Costas