From: Herve Bruyere (hbruyere@cisco.com)
Date: Tue Feb 11 2003 - 08:17:46 GMT-3
simonkc@netsol.co.in wrote:
> Hi,
>
> 1) i do a "show memory" on a cisco 26xx router. It shows me the Total
> Processor Memory and Total IO memory.
> When i add up these 2 values, why is it not equal to total amount of DRAM in
> your router (as shown by sh ver)???
Simply because Processor + I/O mem is not equal total DRAM.
The IOS loaded in RAM and additional datas need also some space:
muuma#sh ver | i with
cisco 2611 (MPC860) processor (revision 0x202) with 28672K/4096K bytes of memory.
muuma#sh mem
Head Total(b) Used(b) Free(b) Lowest(b) Largest(b)
Processor 80B7D5D0 17312304 2375180 14937124 14745720 14822080
I/O 1C00000 4194304 1709592 2484712 2484712 2484668
Below you can see that the total main memory + I/O fits the physical 32 megs:
muuma#sh region
Region Manager:
Start End Size(b) Class Media Name
0x01C00000 0x01FFFFFF 4194304 Iomem R/W iomem
0x60000000 0x60FFFFFF 16777216 Flash R/O flash
0x80000000 0x81BFFFFF 29360128 Local R/W main
0x80008088 0x807C18AB 8099876 IText R/O main:text
0x807C18AC 0x80A78F27 2848380 IData R/W main:data
0x80A78F28 0x80B7D5CF 1066664 IBss R/W main:bss
0x80B7D5D0 0x81BFFFFF 17312304 Local R/W main:heap
Regards,
Herve
>
> 2)Assuming the "sh memory" output does not give us the correct picture about
> memory utilization, which MIBs and objects should we monitor to get the
> memory utilization( as a %)of the router?
> Or can we atleast get the "free memory" , "used memory" or "total memory"
> via SNMP and using MIB expressions, we can compute the Memory utilization as
> a %??What are the MIBs and objects to get this info?
>
> Cheers
> Simon
> .
.
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