Displaying Software Version And More

The show version command provides a lot of information in addition to the version of software that is running on the router. The following information can be collected with the show version command:
Software Version – IOS software version (stored in flash)
Bootstrap Version – Bootstrap version (stored in Boot ROM)
System up-time – Time since last reboot
System restart info – Method of restart (e.g. power cycle, crash)
Software image name – IOS filename stored in flash
Router Type and Processor type – Model number and processor type
Memory type and allocation (Shared/Main) – Main Processor RAM
– Shared Packet I/O buffering
Software Features – Supported protocols / feature sets
Hardware Interfaces – Interfaces available on router
Configuration Register – Bootup specifications, console speed setting, etc.

The following is a sample output of a show version command.

Router# show version
Cisco Internetwork Operating System Software
IOS ™ 3600 Software (C3640-J-M), Version 11.2(6)P, SHARED PLATFORM,
Copyright (c) 1986-1997 by cisco Systems, Inc.
Compiled Mon 12-May-97 15:07 by tej
Image text-base: 0x600088A0, data-base: 0x6075C000

ROM: System Bootstrap, Version 11.1(7)AX [kuong (7)AX], EARLY DEPLOYMENT

Router uptime is 1 week, 1 day, 38 minutes
System restarted by power-on
System image file is “flash:c3640-j-mz_112-6_P.bin”, booted
via flash
Host configuration file is “3600_4-confg”, booted via tftp

cisco 3640 (R4700) processor (revision 0x00) with 107520K/23552K bytes
of memory.
Processor board ID 03084730
R4700 processor, Implementation 33, Revision 1.0
Bridging software.
SuperLAT software copyright 1990 by Meridian Technology Corp).
X.25 software, Version 2.0, NET2, BFE and GOSIP compliant.
TN3270 Emulation software.
Primary Rate ISDN software, Version 1.0.
2 Ethernet/IEEE 802.3 interface(s)
97 Serial network interface(s)
4 Channelized T1/PRI port(s)
DRAM configuration is 64 bits wide with parity disabled.
125K bytes of non-volatile configuration memory.
16384K bytes of processor board System flash (Read/Write)

Configuration register is 0x2102

Displaying Interface States

To view information about a particular interface, use the show interface command. The show interface command provides the following list of important information:
Interface State (e.g. UP, DOWN, LOOPED)
Protocol addresses
Reliability and Load
Encapsulation type
Packet Rates
Error Rates
Signaling Status (i.e. DCD,DSR,DTR,RTS,CTS)

The following is an example of a “show interface serial0” output:

Router#show interface serial 0
Serial0 is up, line protocol is down
Hardware is QUICC Serial
Internet address is
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load 1/255
Encapsulation FRAME-RELAY, loopback not set, keepalive set (10 sec)
LMI enq sent 207603, LMI stat recvd 113715, LMI upd recvd 0, DTE LMI
LMI enq recvd 0, LMI stat sent 0, LMI upd sent 0
LMI DLCI 1023 LMI type is CISCO frame relay DTE
Broadcast queue 0/64, broadcasts sent/dropped 0/0, interface broadcasts
Last input 1w, output 00:00:08, output hang never
Last clearing of “show interface” counters never
Input queue: 0/75/0 (size/max/drops); Total output drops: 0
Queueing strategy: weighted fair
Output queue: 0/64/0 (size/threshold/drops)
Conversations 0/1 (active/max active)
Reserved Conversations 0/0 (allocated/max allocated)
5 minute input rate 1000 bits/sec, 1 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
1012272 packets input, 91255488 bytes, 0 no buffer
Received 916 broadcasts, 0 runts, 0 giants
18519 input errors, 0 CRC, 17796 frame, 0 overrun, 0 ignored, 723 abort
283132 packets output, 13712011 bytes, 0 underruns
0 output errors, 0 collisions, 31317 interface resets
0 output buffer failures, 0 output buffers swapped out
3 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up

Leave a Reply

Please log in using one of these methods to post your comment:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s