Hi Tejal,
You have a two options to get the necessary info:
show version has a line reporting how much is installed in the router, for
example:
cisco 7206 (NPE150) processor with 114688K/16384K bytes of memory.
This tells you the router as 112M processor memory. The 16M remaining above
is reserved for I/O. In that 112M you will need to load the IOS image. Even
if the router reports 128M at boot time, it reserves some as per above - so
the line above you see in show version is quite important. Some versions of
IOS on the 2600/3600 series lets you change how much is used for I/O and
how much is processor - 12.2T will try and automagically work out what you
need based on the adapters you have installed.
Another example, from a 7200 with 32M RAM:
cisco 7206 (NPE150) processor with 26624K/6144K bytes of memory.
26M is available for the processor, and after loading 12.0(15)S and a very
basic configuration I have very little spare memory left - look at the
Processor line below:
alpha>sh mem
Head Total(b) Used(b) Free(b) Lowest(b) Largest(b)
Processor 612E3A80 7456128 7283572 172556 127552 127108
I/O 1A00000 6291456 2271748 4019708 3976880 4019068
PCI 4B000000 1048600 883284 165316 165316 160700
You can configure BGP on something like this, but don't expect to carry too
many routes - the full routing table is something like 10Mbytes these days.
To be realistic, don't try taking a full BGP feed on any router which has a
basic memory configuration of 64Mbytes or less. 96Mbytes or, better,
128Mbytes will be necessary to receive the full table, with options. My
advice is always to fill the box with RAM, at least 50% more than you need
as that allows for growth of the routing table, unexpected events and
"accidents"...
hth,
philip
--At 15:18 03/08/2001 +0530, Tejal wrote: >Dear friends, > > I have posted this message before also. > >can anybody pl. tell me that how can check the DRA >in my existing router. > > Beside the commanf sh mem. >i m not able to understat its output. >its showing processor and i/o memoty. > >I will get following message at boot. >does it mean that i have 32MB of RAM in my router. >I want to start BGP on the router.so pl. tell me >that is that any way to check out hoe much RAM >my existing router have? > > >#System Bootstrap, Version 11.3(2)XA4, RELEASE SOFTWARE (fc1) >#Copyright (c) 1999 by cisco Systems, Inc. >#TAC:Home:SW:IOS:Specials for info >#C3600 platform with 32768 Kbytes of main memory > >Thanks in advance >Tejal
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