The Catalyst® 5000 2.1 Memory (Cisco Systems® product numbers MEM-C5K-4M-V21 and MEM-C5K-4M-V21=) is now a discontinued item, effective immediately. These items have been superseded by Cisco product number MEM-C5K-16M-CUSTOM=, a 16-MB upgrade module.
The Catalyst 5000 Version 2.1 software and greater requires 8 MB of dynamic random access memory (DRAM) in the supervisor module. Initially, the Catalyst 5000 shipped with 4 MB of DRAM installed and as part of the 2.1 software launch, Cisco provided a free memory upgrade to those users who had supervisor modules with the 4 MB of DRAM. Cisco has exhausted the supply of the free memory upgrade packages, and subsequent upgrades will be chargeable items.