It was my understanding that none of the 4 mb 2900XLs could do any trunking. ISL or dot1q needed 8mb. At least that was the case 3 years ago when I was looking into it. [CT>] ... and still this is the case today. The 4mb switch hold the 12.0(5) images, but there is no trunking available to configure. [CT>] Corneliu