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New Member

Ios upgrade problem


I was trying to upgrade the ios router gateway to support the MGCP protocol

i had the c3660-is-mz.122-8.T4.bin image and i would like to upgrade to c3660-is-mz.122-11.T9.bin image.

My router gateway characteristics:

- Cisco 3660

- DRAM 96 Mo

- Flash 32 Mo

When i was trying to upgrade the new IOS, i had the error message Low memory...

could you please tell me where is the problem..

I checked on Cisco website and i found that we need 96 DRAM and 32 Mo Flash.

Could you please help me


Re: Ios upgrade problem

Memory requirements are dependant on alot of factors, the main considerations are:-

- what modules are installed

- which IOS feature set you require which will support the above.

New Member

Re: Ios upgrade problem


Thank you for your response

Yes i was chanking the memory calculating

On my router i have these modules

- 02 NM-HDA cards.

After checking i fond that we need 32Mo flash and 96 Mo DRAM. with ios 12.2(15)T5 or 12.2(15)T IP Plus.

I was trying also to use another ios that it is function in the same router but with oldest flash memory...

I was trying another new memory but the same.

I think that the new memory is not formatted or not partitioned ...Any idea about this ??

thank you for your help

Re: Ios upgrade problem

You are able to partition your flash with a maximum of 2 partitions, and each partition is configurable in size.

For example you can format 16Mb with 2 partitions each with 8Mb in each, this is achieved as follows:-

conf t

router(config)#partition flash: 2 8 8

This command creates 2 partions, the first partion is set to 8Mb and so is the second. The same applies if you have an external flash (PCMCIA), partition slot0: 2 4 4, depending on the size of flash.

Re: Ios upgrade problem

Given the modules you listed 96MB Memory, 32MB flash is essentially the minimum for this configuration. You have 4 spare slots, therefore you I/O memory requirement will vary depending how the slots are populated in future.

Your specification requires at least 25% I/O memory, therefore verify that configuration has memory-size iomem 25 configured. 25 percent is normally the default.

I would specifically look longterm when order you memory, given the fact that you have 4 spares slots for expansion.

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