CISCO ISR 4321

[usama]

I have Cisco Router ISR4321 with inbuilt 4GB Ram and flash. I need to upgrade it to 8GB. Should i add 4GB or 8 GB ??

[Jaime Valencia]

https://www.cisco.com/c/en/us/td/docs/routers/access/4400/hardware/installation/guide4400-4300/C4400_isr/Overview.html#99991

[andyobeidi]

Jaime, how does this help. You have to specify what Memory to buy....not dump a datasheet link. 

I have the same issue and n one seems to know how to upgrade an ISR4321 to 8G RAM

[liviu.gheorghe]

The memory in the ISR 4321 is DDR3 ECC and the ISR 4321 has only one DIMM slot. The memory upgrade part number for ordering from Cisco is MEM-4320-4GU8G.

Cisco recommends a flash upgrade with the memory upgrade, the reason being the crash dumps the IOS generates in case of a crash - the more memory the router has, more flash it needs to store the memory dumps. Flash upgrade part number is MEM-FLSH-4U8G.

Hope it helps.