Cisco 2951 Memory

[ledzepp817]

I have 4 GB installed in 2951 but only 2 GB show up.  Am I missing something?

Total memory size = 4096 MB - DIMM0 = 2048 MB, DIMM1 = 2048 MB

CISCO2951/K9 platform with 4194304 Kbytes of main memory

Main memory is configured to 72/72(dimm 0/1) bit mode with ECC enabled

Installed image archive

Cisco CISCO2951/K9 (revision 1.1) with 1835264K/261888K bytes of memory.

3 Gigabit Ethernet interfaces

1 terminal line

1 Virtual Private Network (VPN) Module

DRAM configuration is 72 bits wide with parity enabled.

255K bytes of non-volatile configuration memory.

250880K bytes of ATA System CompactFlash 0 (Read/Write)

4001760K bytes of ATA CompactFlash 1 (Read/Write)

[turnera]

If I am reading the following correctly, the maximum memory for that  router is 2.5 Gb. The second stick is probably being ignored because it  is too large to begin with.

http://www.cisco.com/en/US/docs/routers/access/2900/hardware/installation/guide/Overview.html#wp1071964

Cisco 2951

Expansion Type—VLP RDIMM with ECC. VLP RDIMM sizes—512 MB, 1 GB, 2 GB. VLP RDIMM slots—2. Default VLP RDIMM memory module — One 512 MB module (slot 0) Maximum memory—2.5 GB.

It looks as though you can put a 512 MB DIMM in slot 0 and a 2 GB DIMM in slot 1 and that will be it.