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Webcast-Catalyst9k
New Member

Router memory and IOS

Hello,

As I look to update my routers I see that the IOS states minimum req for DRAM and FLASH. Getting the flash from the router is pretty easy ... but where in the show ver is the DRAM listed? From the show ver output listed below, is it 28672K/4096K bytes of memory? If so, what do those numbers represent?

Thanks,

Richard

Router#sho ver

Cisco Internetwork Operating System Software

IOS (tm) C2600 Software (C2600-I-M), Version 12.2(31), RELEASE SOFTWARE (fc2)

Technical Support: http://www.cisco.com/techsupport

Copyright (c) 1986-2005 by cisco Systems, Inc.

Compiled Thu 11-Aug-05 17:24 by tinhuang

Image text-base: 0x8000808C, data-base: 0x80A1E318

ROM: System Bootstrap, Version 12.1(3r)T2, RELEASE SOFTWARE (fc1)

ROM: C2600 Software (C2600-I-M), Version 12.2(31), RELEASE SOFTWARE (fc2)

Router uptime is 1 hour, 25 minutes

System returned to ROM by power-on

System image file is "flash:c2600-i-mz.122-31.bin"

cisco 2620 (MPC860) processor (revision 0x600) with 28672K/4096K bytes of memory

.

Processor board ID JAD05350BG2 (2599831965)

M860 processor: part number 0, mask 49

Bridging software.

X.25 software, Version 3.0.0.

Basic Rate ISDN software, Version 1.1.

1 FastEthernet/IEEE 802.3 interface(s)

1 Serial network interface(s)

1 ISDN Basic Rate interface(s)

32K bytes of non-volatile configuration memory.

16384K bytes of processor board System flash (Read/Write)

Configuration register is 0x2142

2 ACCEPTED SOLUTIONS

Accepted Solutions

Re: Router memory and IOS

Hi Richard

DRAM

cisco 2620 (MPC860) processor (revision 0x600) with 28672K/4096K bytes of memory

28672K + 4096K = 32768 KB approx 32 MB RAM

Flash

16384K bytes of processor board System flash (Read/Write)

16384 KB = approx 16 MB

You might also want to set your config-register to the correct value 0x2102. Current config-register skips startup-config

HTH

Lejoe

New Member

Re: Router memory and IOS

Those numbers represent how the memory on the router is used.

The total amount of installed memory are those two numbers added up. In your case, this router has 32MB, of which 4MB is used as I/O memory.

--

Marko

CCIE #18427 (SP) // + DE wannabe

My network blog: http://cisco.markom.info

4 REPLIES

Re: Router memory and IOS

Hi Richard

DRAM

cisco 2620 (MPC860) processor (revision 0x600) with 28672K/4096K bytes of memory

28672K + 4096K = 32768 KB approx 32 MB RAM

Flash

16384K bytes of processor board System flash (Read/Write)

16384 KB = approx 16 MB

You might also want to set your config-register to the correct value 0x2102. Current config-register skips startup-config

HTH

Lejoe

New Member

Re: Router memory and IOS

Those numbers represent how the memory on the router is used.

The total amount of installed memory are those two numbers added up. In your case, this router has 32MB, of which 4MB is used as I/O memory.

--

Marko

CCIE #18427 (SP) // + DE wannabe

My network blog: http://cisco.markom.info

New Member

Re: Router memory and IOS

Thanks Lejoe and Marko,

Can 2600's be ugraded in memory?

Also ... on some of my other routers I have some unusual numbers for memory that don't seem right such as ...

45056K/4096K ... 49M?

32768K/8192K ... 40M?

127627K/3445K ... 131M?

Those are pretty odd numbers for memory aren't they?

Richard

Re: Router memory and IOS

Richard, in addition to the post to get DRAM and FLASH figures you can simply always devide by 1024.

output example

cisco 2620 (MPC860) processor (revision 0x600) with 28672K/4096K bytes of memory

28672K + 4096K / 1024 = 32 MB DRAM total

Same for flash information

16384K bytes of processor board System flash (Read/Write)

16384 / 1024 = 16MB Flash total

45056K + 4096K / 1024 = 48 MB

32768K + 8192K / 1024 = 40 MB

127627 + 3445K / 1024 = 128 MB

Can 2600's be ugraded in memory?

Yes they can all depending what they currently have and what is the maximun they can take.

Go over this specs in this link for upgrading memory hardware in 2600 models.

See table 1

http://www.cisco.com/en/US/docs/routers/access/2600/hardware/installation/notes/2600mem.html#wp92535

Regards

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