System information

The show version Command
Creating Core Dumps A-501
Appendix B, “Memory Maps,” provides an example of show stacks output and memory map
information that can help you determine whether a system crash was caused by a software or
hardware problem.
The show version Command
The show version command displays the image type, version number, and function sets that identify
the exact software that is running on your router. Also displayed is the current configuration register
setting. The following example displays sample output from the show version command:
milou>show version
Cisco Internetwork Operating System Software
IOS (tm) GS Software (GS7-K-M), Version 11.0(9), RELEASE SOFTWARE (fc1)
Copyright (c) 1986-1996 by cisco Systems, Inc.
Compiled Tue 11-Jun-96 03:52 by tstevens
Image text-base: 0x00001000, data-base: 0x007614F0
ROM: System Bootstrap, Version 5.2(2), RELEASE SOFTWARE
ROM: GS Software (GS7), Version 10.2(2), RELEASE SOFTWARE (fc1)
milou uptime is 2 days, 20 hours, 26 minutes
System restarted by error - Software forced crash, PC 0x1CF82C at 20:25:38 PDT M
on Aug 5 1996
System image file is “images/gs7-k-mz.110-9”, booted via flash
cisco RP1 (68040) processor (revision B0) with 16384K bytes of memory.
Processor board ID 00130334
G.703/E1 software, Version 1.0.
Bridging software.
X.25 software, Version 2.0, NET2, BFE and GOSIP compliant.
Primary Rate ISDN software, Version 1.0.
1 Silicon Switch Processor.
1 EIP controller (6 Ethernet).
1 FEIP controller (2 FastEthernet).
1 FIP controller (1 FDDI).
1 MIP controller (2 T1)
6 Ethernet/IEEE 802.3 interfaces.
2 FastEthernet/IEEE 802.3 interfaces.
48 Serial network interfaces.
1 FDDI network interface.
2 Channelized T1/PRI ports.
128K bytes of non-volatile configuration memory.
4096K bytes of flash memory sized on embedded flash.
Configuration register is 0x102
milou>
Version Numbering
Cisco uses a numbering scheme that uniquely identifies each release of the Cisco IOS software.
Understanding this scheme will help you distinguish between the different types of releases that are
available.
The following formula is used to identify releases of the Cisco IOS software:
A.a (x.y)
Major releases are indicated by the numbers outside the parentheses (A and a). Examples of major
release numbers are 9.21, 10.0, 10.2, 11.1, and so on. The initial release available for customers is
indicated by a 1 in parentheses following the major release number, for example, 9.21(1), 10.0(1),
10.2(1), and 11.1(1).