... 256-MB Compact Flash. The default Cisco 2951 has a unique memory configuration, whereby a 512-MB DIMM is ... SKUDescriptionMEM-CF-256U4GB256MB to 4GB Compact Flash Upgrade for Cisco 1900, 2900, 3900 ISRMEM-CF-256U2GB256MB to 2GB ... provide the New Original Cisco switches, Cisco Router, Cisco Firewall, Cisco SFP (Mini GBIC) Transceiver, Cisco Wireless Access Point, Cisco Wireless Control...etc. Please ...