Mahesh, I'll assume that you are running the VERA microcode; we never ran the microcode in simulation, so I am not sure what the real answer is. However, this might correspond to a problem we've been having on real hardware where the ready bits are stale as we read them, so we get bad data from the FIFO. Unfortunately I don't know a good solution for this problem. Zuki On Wed, 19 Jun 2002, mahesh hampasagar wrote:

Hi , i have got 1 problem with microcoding of ixp1200, when iam running in simulation mode to receive the packet with more than 2 threads, it gives the error saying receiver buffer undreflow, suppose if i run for 2 threads no problem . and if i see the command prompt it says ***** %E-ERROR at fbox cycle 3805 in simulation ---------- (NOTE: Execution will stop ASAP due to error.): FBUS logic - unexpected encoding on incoming byte enables: ff Simulation prematurely stopped due to error condition.

if u have any idea pl let me know

thanx,

mahesh

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