Calculating router memory in MB

Could someone please tell me how to determine how much router memory you have in MB? I'm a dummy, sorry this is such a basic question. Here's an example:

Cisco 3640 (R4700) processor (revision 0xFF) with 124928K/6144K bytes of memory.

Now I know you add the first part to the last part, and we have 131072. This is in kilobytes, so there is no need to divide by 8 to get the figure in MB we are accustomed to seeing, so do I just move the decimal 3 places to the left and get 131MB?

I'm way off, aren't I? Please correct my ignorance!

Find more posts tagged with

Save $250 on 2025 certification boot camps from Infosec!

Book now with code EOY2025

Button

Comments

tiersten

ehnde wrote: »

Cisco 3640 (R4700) processor (revision 0xFF) with 124928K/6144K bytes of memory.

First number is local/process memory.
Second number is IO memory.

Add both together and then divide by 1024 to get the total memory visible to that router or sup. It isn't just moving the decimal place because 1024 != 1000.

124928K + 6144K = 131072K

131072K / 1024 = 128MB

impz

Adding to what the above poster said: 8bits = 1byte 1024 bytes = 1KB 1024 KB =1MB 1Kb=1kilobits 1KB=1kilobytes

ehnde

Thanks guys that makes perfect sense, I get it now.

alan2308

tiersten wrote: »

First number is local/process memory.
Second number is IO memory.

Add both together and then divide by 1024 to get the total memory visible to that router or sup. It isn't just moving the decimal place because 1024 != 1000.

124928K + 6144K = 131072K

131072K / 1024 = 128MB

Yea, only HDD manufacturers use 1000.