Cisco MEM2821-256U512D enterprise networking (router/Catalyst switch/UCS families) Telecom System Card / Module

The Cisco MEM2821-256U512D is a 256MB-to-512MB DRAM upgrade kit for the Cisco 2821 integrated services router. The 2821 sits in the middle of the fixed-configuration 2800 series, and this upgrade lifts its memory from the factory 256MB baseline to the 512MB more typically needed once IOS feature sets – combined routing, firewall, VPN and voice services running together – are layered onto the router beyond a single function. Fitting is a standard DIMM swap with no other chassis changes required, and the upgrade is a routine way to extend the working life of a 2821 already in service rather than replacing the chassis. Tech-Star supplies genuine Cisco memory spares for maintaining and upgrading established 2821 router deployments.