05-21-2008 05:18 AM - edited 03-03-2019 10:02 PM
Hello my friends,
I have a question about Router memory in general.
show memory summary
Head Total(b) Used(b) Free(b) Lowest(b) Largest(b)
Processor 203E77C 1316996 1316180 816 0 116
I/O 2180000 524288 292696 231592 155244 195684
The total memory size is
1316996 + 524288 = 1841284 Bytes
And from the show version
cisco 1601 (68360) processor (revision C) with 1536K/512K bytes of memory.
Processor board ID 10164160, with hardware revision 00000000
Bridging software.
Total from show 1536K + 512K= 2 MB
So, there is a difference between the total memory from the show memory summary and the show version, why that?
Thanks in advance
05-21-2008 08:54 PM
Hi
can you check whether any dead process is occupying the memory ?
you can check the same using show memory dead command.
regds
05-21-2008 09:20 PM
Hi,
Thanks.
Look, show memory dead:
===========================================
Router#show memory dead
Head Total(b) Used(b) Free(b) Lowest(b) Largest(b)
Processor 203E77C 1316996 1316232 764 0 128
I/O 2180000 524288 293268 231020 155244 195684
Processor memory
Address Bytes Prev. Next Ref PrevF NextF Alloc PC What
20A4754 32 20A4704 20A47A0 1 814E204 EIGRP IIDB link
20A484C 24 20A47A0 20A4890 1 816FB48 Router Init
20A4890 24 20A484C 20A48D4 1 816FB48 Router Init
20A6CB4 32 20A6C54 20A6D00 1 814E204 EIGRP IIDB link
20A744C 24 20A6F30 20A7490 1 8156220 Dual IIDB scratch table
20A91C8 52 20A900C 20A9228 1 814E204 EIGRP IIDB link
20AAB54 56 20AAAAC 20AABB8 1 8143F98 SMF entry
20DA164 52 20DA11C 20DA1C4 1 816FB48 Router Init
2108034 436 2107FD4 2108214 2 814DF34 EIGRP IIDB
2128D30 52 2128CB4 2128D90 1 83700D0 Router Init
2137E5C 400 21337E0 2138018 395 814DF34 EIGRP IIDB
2138018 400 2137E5C 21381D4 1 814DF34 EIGRP IIDB
217954C 68 217947C 21795BC 1 83700D0 Virtual Exec
------
2224
I/O memory
Address Bytes Prev. Next Ref PrevF NextF Alloc PC What
==================================
The 2224 Bytes is the sum of the memory allocated by dead processes?
which means i need to add this value plus Processor and I/O memory sizes, but this is not the same as real memory size (2 MB)
Many Thanks
05-29-2008 11:05 AM
The show version will show the total hardware memory installed on the router.
show memory sum "Free(b)" will show the memory installed minus the amount taken by the IOS.
Doug Bruyer
CCIE 18009
05-29-2008 12:35 PM
Correction to the post above, "Free(b)" should be Total (b)
07-13-2010 06:16 AM
Thanks a lot.
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