Cisco Internetwork Operating System Software IOS (tm) 3000 Software (IGS-BPRX), Version 10.0(6), RELEASE SOFTWARE (fc1) Copyright (c) 1986-1994 by cisco Systems, Inc. Compiled Tue 25-Oct-94 19:01 by dougs cisco IGS (68020) processor (revision A) with 4092K/512K bytes of memory. So this is a "Pancake", square box that opens so the bottom comes out with a plastic latch. A 25xx is a 1U rack mount thing. They share mostly the same code, so things can look oddly confucing, on a 1U 2511, it says the boot is for a IGS/3000 box... Router#sh hard Cisco Internetwork Operating System Software IOS (tm) 2500 Software (C2500-DS-L), Version 11.2(26)P7, RELEASE SOFTWARE (fc1) Copyright (c) 1986-2004 by cisco Systems, Inc. Compiled Wed 09-Jun-04 00:06 by hqluong Image text-base: 0x03038FBC, data-base: 0x00001000 ROM: System Bootstrap, Version 11.0(10c)XB1, PLATFORM SPECIFIC RELEASE SOFTWARE (fc1) BOOTFLASH: 3000 Bootstrap Software (IGS-BOOT-R), Version 11.0(10c)XB1, PLATFORM SPECIFIC RELEASE SOFTWARE (fc1) System image file is "flash:c2500-ds-l.112-26.P7.bin", booted via flash cisco AS2511-RJ (68030) processor (revision K) with 14336K/2048K bytes of memory. This very old SW runs DECnet in GRE tunnels... -:) (But it will not fit in the 3000 with 4M memory. My mamemory fails me if it ws possible to put 4M modules in the IGS/3000, I think the answer is no.) And don't get to confuced, a 3000 was a 25xx painted white and it can do 16M, but the original IGS (bigger box) can not do more than 4M. I can't find any reference to the processor speed anywhere. It;s not show anywhere except in data sheets .. -:) -P