Here you can find a collection of undocumented (not on Cisco Dokumentation CD or in online help) IOS commands:
If you know more undocumented IOS commands for this collection, please send me a e-mail.
With the command csim you can emulate a voice call. Itīs like sombody calls the specified number. Usefull,
if you donīt have physically access to telephone:
Sucessfull call:
wg1r1#csim start 089150
csim: called number = 089150, loop count = 1 ping count = 0
csim err csimDisconnected recvd DISC cid(21)
csim: loop = 1, failed = 1
csim: call attempted = 1, setup failed = 1, tone failed = 0
Call to a not defined number:
wg1r1#csim start 089151
csim: called number = 089151, loop count = 1 ping count = 0
csim err:csim_do_test Error peer not found
With show interface switching you can see in detail, which protocols are process, fast or elsewhere switched. Itīs helpfull for traffic engineering:
wg1r1#sh interfaces switching London#show ip ospf statistic London#deb ip ospf monitor OSPF spf monitoring debugging is on sh ver Router#ttcp Router#ttcp Router#if-con 2 con Get the complete SNMP MIB table. On controller interface you get without this command e.g. no out bytes
counter. With this commands you get every object with SNMP get-next. Router#who Router#sh region router> ps -c Will list the process on the router in a "better" way then show process. Many thanks for this command goes to Thomas Surber. leaving a telnet session: normally with "exit" or "ex". Many thanks for this command goes to Peter Schmid. test aaa group radius toto titi To test radius on one router. Many thanks for this command goes to Serge Baikof. bgp dynamic-med-interval bgp process-dpa clear ip eigrp [as] event Clear IP-EIGRP event logs
clear ip eigrp [as] logging Stop IP-EIGRP event logging
config overwrite debug dialer detailed debug ip packet ... dump Outputs a hex & ASCII dump of
the packet's contents debug isdn code debug sanity if-con attach to a vip console
if-cons ip forwarding ip forwarding accounting ip forwarding accounting adjacency-update ip forwarding accounting non-recursive ip forwarding accounting per-prefix ip forwarding accounting prefix-length ip forwarding switch ip forwarding traffic-statistics ip forwarding traffic-statistics load-interval ip forwarding traffic-statistics update-rate ip igmp ip igmp immediate-leave ip igmp immediate-leave group-list ip local-pool ip ospf-name-lookup ip slow-converge ip spd ip spd mode ip spd mode aggressive ip spd queue ip spd queue max-threshold ip spd queue min-threshold memory scan Parity check for 7500 RSPs
modem-mgmt csm debug-rbs no service password-recovery service internal set destination-preference show alignment show asp show caller show caller ip show chunk show chunk summary show controller vip log show controller vip tech show fib show fib drop show fib interface show fib interface detail show fib interface loopback show fib interface null show fib interface statistics show fib interface vlan show fib linecard show fib linecard detail show fib not-cef-switched show fib not-fib-switched show hardware show idb show interface statis show interface switching show interfaces stat show interface stat show interfaces switching show int switching show ip eigrp event [as] [start# end#] IP-EIGRP Events show ip eigrp sia-event [as] [start# end#] IP-EIGRP SIA event show ip eigrp timers [as] IP-EIGRP Timers
show ip ospf bad-checksum show ip ospf delete show ip ospf delete-list show ip ospf ev show ip ospf events show ip ospf maxage show ip ospf maxage show ip ospf statistics show isdn active show isdn history show list show list nonempty show llc show media show media access-lists show modem mapping show parity show parser show parser links show parser modes show parser unresolved show profile show profile detail show profile terse show refuse-message show region show region address show rsh show rsh-disable-commands show rsp show slip show slot show snmp mib show sum show timers snmp-server priority low test crash makes the router crash
test ipc misc test mbus power ttcp router bgp ... bgp redistribute-internal Usage: Redistributing BGP into another protocol only redistributes E-BGP routes.
Using this command in the BGP configuration will also redistribute I-BGP routes in the other routing-protocol. Many thanks goes to Sanjeewa Alahakoon for this list of undocumented IOS commands.
FX1000
Throttle count 0
Drops RP 292 SP 0
SPD Flushes Fast 0 SSE 0
SPD Aggress Fast 0
SPD Priority Inputs 0 Drops 0
Protocol Path Pkts In Chars In Pkts Out Chars Out
Other Process 0 0 722070614 2593422020
Cache misses 0
Fast 0 0 0 0
Auton/SSE 0 0 0 0
IP Process 0 0 122784 13572151
Cache misses 0
Fast 0 0 0 0
Auton/SSE 0 0 0 0
ARP Process 0 0 185535 11874240
Cache misses 0
Fast 0 0 0 0
Auton/SSE 0 0 0 0
CDP Process 0 0 855816 286544651
Cache misses 0
Fast 0 0 0 0
Auton/SSE 0 0 0 0
With show ip ospf statistics you get detail informations about OSPF SPF. You can see the
reasons for SPF and the calculation times:
Area 0: SPF algorithm executed 15 times
SPF calculation time
Delta T Intra D-Intra Summ D-Summ Ext D-Ext Total Reason
00:45:02 32 0 0 0 0 0 36 R,
00:41:00 28 0 0 0 0 0 28 R, N,
00:40:50 28 0 0 0 0 0 28 R,
00:38:13 28 0 0 0 4 0 32 R, X
00:34:18 24 0 0 0 4 0 32 R, N,SN,SA,X
00:07:37 24 0 0 0 0 0 36 R,
00:05:18 308 0 4 0 28 0 356 R,
00:04:05 24 0 0 0 4 0 28 R,
00:01:31 24 0 4 0 0 0 36 R,
00:01:21 24 0 0 4 0 0 36 R,
With debug ip ospf monitor you can monitor the OSPF SPF.
2d04h: OSPF: 192.168.181.2 address 192.168.181.193 on TokenRing0 is dead, state DOWN
2d04h: OSPF: Schedule SPF in area 0
Change in LS ID 0.0.0.0, LSA type R,
2d04h: OSPF: schedule SPF: spf_time 0ms wait_interval 187489656s
2d04h: %SYS-5-CONFIG_I: Configured from console by console
2d04h: OSPF: Start redist-scanning
2d04h: OSPF: Scan for redistribution
2d04h: OSPF: End scanning, Elapsed time 0ms
2d04h: %LINK-5-CHANGED: Interface TokenRing0, changed state to administratively down
2d04h: OSPF: Begin SPF at 0xB2CF100ms, process time 360ms
2d04h: spf_time 0ms, wait_interval 187489656s
2d04h: OSPF: End SPF at 0xB2CF120ms, Total elapsed time 32ms
2d04h: Intra: 24ms, Inter: 0ms, External: 0ms
Start a TCP data server/receiver for TCP performance testing between two Cisco 7500 router:
Cisco Internetwork Operating System Software
IOS (tm) RSP Software (RSP-JSV-M), Version 12.0(7), RELEASE SOFTWARE (fc1)
transmit or receive [receive]: transmit
Target IP address: 1.1.1.1
perform tcp half close [n]:
send buflen [8192]:
send nbuf [2048]:
bufalign [16384]:
bufoffset [0]:
port [5001]:
sinkmode [y]:
buffering on writes [y]:
show tcp information at end [n]:
ttcp-t: buflen=8192, nbuf=2048, align=16384/0, port=5001 tcp -> 1.1.1.1
%Connect failed: Destination unreachable; gateway or host down
transmit or receive [receive]:
perform tcp half close [n]:
receive buflen [8192]:
bufalign [16384]:
bufoffset [0]:
port [5001]:
sinkmode [y]:
rcvwndsize [4128]:
delayed ACK [y]:
show tcp information at end [n]:
ttcp-r: buflen=8192, align=16384/0, port=5001
rcvwndsize=4128, delayedack=yes tcp
On Cisco 7500 you can connect you to the VIP boards for VIP commands (memory, cpu, etc.)
Entering CONSOLE for VIP2 2
Type "^C^C^C" or "if-quit" to end this session
VIP-Slot2>
VIP-Slot2>?
Exec commands:
clear Reset functions
disable Turn off privileged commands
disconnect Disconnect an existing network connection
enable Turn on privileged commands
exit Exit from the EXEC
help Description of the interactive help system
lock Lock the terminal
login Log in as a particular user
logout Exit from the EXEC
name-connection Name an existing network connection
ping Send echo messages
resume Resume an active network connection
set Set system parameter (not config)
show Show running system information
systat Display information about terminal lines
terminal Set terminal line parameters
traceroute Trace route to destination
where List active connections
VIP-Slot2>en
VIP-Slot2#sh ver
Cisco Internetwork Operating System Software
IOS (tm) VIP Software (SVIP-DW-M), Version 12.0(7), RELEASE SOFTWARE (fc1)
Copyright (c) 1986-1999 by cisco Systems, Inc.
Compiled Wed 13-Oct-99 22:05 by phanguye
Image text-base: 0x60010920, data-base: 0x60224000
ROM: System Bootstrap, Version 11.1(11368) [pgreenfi 17], INTERIM SOFTWARE
VIP-Slot2 uptime is 10 minutes
System restarted by power-on
Running default software
cisco VIP2 (R4700) processor (revision 0x02) with 8192K bytes of memory.
Processor board ID 00000000
R4700 processor, Implementation 33, Revision 1.0 (512KB Level 2 Cache)
4 Ethernet/IEEE 802.3 interface(s)
1 FastEthernet/IEEE 802.3 interface(s)
Configuration register is 0x0
VIP-Slot2#?
Exec commands:
cd Change current directory
clear Reset functions
clock Manage the system clock
configure Enter configuration mode
copy Copy from one file to another
debug Debugging functions (see also 'undebug')
delete Delete a file
dir List files on a filesystem
disable Turn off privileged commands
disconnect Disconnect an existing network connection
enable Turn on privileged commands
exit Exit from the EXEC
help Description of the interactive help system
lock Lock the terminal
login Log in as a particular user
logout Exit from the EXEC
more Display the contents of a file
name-connection Name an existing network connection
no Disable debugging functions
ping Send echo messages
pwd Display current working directory
reload Halt and perform a cold restart
resume Resume an active network connection
send Send a message to other tty lines
set Set system parameter (not config)
setup Run the SETUP command facility
show Show running system information
systat Display information about terminal lines
terminal Set terminal line parameters
test Test subsystems, memory, and interfaces
traceroute Trace route to destination
undebug Disable debugging functions (see also 'debug')
where List active connections
write Write running configuration to memory, network, or terminal
VIP-Slot2#
Router(config)#no snmp-server sparse-tables
Line User Host(s) Idle Location
* 0 con 0 idle 00:00:00
1 aux 0 idle 00:01:19
Get more detail IOS informations:
Region Manager:
Start End Size(b) Class Media Name
0x02700000 0x02FFFFFF 9437184 Iomem R/W iomem
0x60000000 0x60FFFFFF 16777216 Flash R/O flash
0x80000000 0x826FFFFF 40894464 Local R/W main
0x80008088 0x8071A2A3 7414300 IText R/O main:text
0x8071A2A4 0x8097FD93 2513648 IData R/W main:data
0x8097FD94 0x80A4E0CF 844604 IBss R/W main:bss
0x80A4E0D0 0x826FFFFF 30089008 Local R/W main:heap
do this very fast with "q" (quit)