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New Member

EEM script causing router to reload

I want to be able to run this script regularly and only update the logs if there has been a change. To do this I have used the context save and retrieve commands to store and retreve the variables.

When I run this script it causes my router to reload. I've debugged it down to 5.0 and it runs ok. If I go to 5.40 it crashes, any ideas?

event manager applet report_adsl_health_test

event none

action 1.0 comment Collect ADSL sync speed and format it for the log and banner output

action 1.1 info type snmp oid 1.3.6.1.2.1.10.94.1.1.2.1.8.11 get-type exact

action 1.2 divide $_info_snmp_value 1000000

action 1.3 regexp "^." "$_remainder" _match

action 1.4 set final_remainder "$_match"

action 1.5 set dsl_rate "$_result.$final_remainder"

action 2.0 comment Collect noise margin and format it for the log and banner output

action 2.1 info type snmp oid 1.3.6.1.2.1.10.94.1.1.3.1.4.11 get-type exact

action 2.2 divide $_info_snmp_value 10

action 2.3 set noise_margin "$_result.$_remainder"

action 3.0 comment Collect number of carrier and format it for the log and banner output

action 3.1 info type snmp oid 1.3.6.1.4.1.9.2.2.1.1.21.16 get-type exact

action 3.2 set carrier_transitions "$_info_snmp_value"

action 4.0 comment Retrieve previous ADSL health measurements or if non-existant, then set previous variables to 0

action 4.10 handle-error type ignore

action 4.11 context retrieve key key_prev_dsl_rate variable "previous_dsl_rate"

action 4.12 if $_error ne FH_EOK goto 4.20

action 4.13 handle-error type ignore

action 4.14 context retrieve key key_prev_noise_margin variable "previous_noise_margin"

action 4.15 if $_error ne FH_EOK goto 4.20

action 4.16 handle-error type ignore

action 4.17 context retrieve key key_prev_carrier_transitions variable "previous_carrier_transitions"

action 4.18 if $_error ne FH_EOK goto 4.20

action 4.20 set previous_dsl_rate "0"

action 4.21 set previous_noise_margin "0"

action 4.22 set previous_carrier_transitions "0"

action 5.0 comment Compare current and previous adsl health measurements

action 5.10 set changes "0"

action 5.11 if $previous_dsl_rate eq $dsl_rate goto 5.20

action 5.12 increment changes 1

action 5.20 if $previous_noise_margin eq $noise_margin goto 5.30

action 5.21 increment changes 1

action 5.30 if $previous_carrier_transitions eq $carrier_transitions goto 5.40

action 5.31 increment changes 1

action 5.40 if $changes eq 0 goto 93.1

action 90.0 comment Record new ADSL heath in log and set banner 

action 90.1 syslog priority notifications msg "Current ADSL speed is $dsl_rate Mbps, Noise Margin is $noise_margin dB, $carrier_transitions WAN interface resets since counters last cleared"

action 91.1 cli command "enable"

action 91.2 cli command "conf t"

action 91.3 cli command "banner exec ZCurrent ADSL speed is $dsl_rate Mbps, Noise Margin is $noise_margin dB, $carrier_transitions WAN interface resets since counters last clearedZ"

action 91.4 cli command "end"

action 92.0 comment Save updated ADSL health measurements

action 92.1 context save key key_prev_dsl_rate variable "dsl_rate"

action 92.2 context save key key_prev_noise_margin variable "noise_margin"

action 92.3 context save key key_prev_carrier_transitions variable "carrier_transitions"

action 93.1 exit

end

1 ACCEPTED SOLUTION

Accepted Solutions
Cisco Employee

EEM script causing router to reload

Hi Ryan,

Yes that's the workaround to this bug.  Add instead of increment.

Mike

10 REPLIES
Cisco Employee

EEM script causing router to reload

Post the output of show ver, show stack and show region from this device.

New Member

EEM script causing router to reload

See below:

router#show ver

Cisco IOS Software, C870 Software (C870-ADVIPSERVICESK9-M), Version 15.1(4)M6, RELEASE SOFTWARE (fc2)

Technical Support: http://www.cisco.com/techsupport

Copyright (c) 1986-2013 by Cisco Systems, Inc.

Compiled Thu 14-Feb-13 11:07 by prod_rel_team

ROM: System Bootstrap, Version 12.3(8r)YI4, RELEASE SOFTWARE

router uptime is 12 hours, 1 minute

System returned to ROM by reload at 20:58:05 AEST Tue Aug 13 2013

System restarted at 20:59:32 AEST Tue Aug 13 2013

System image file is "flash:c870-advipservicesk9-mz.151-4.M6.bin"

Last reload reason: Unknown reason

This product contains cryptographic features and is subject to United

States and local country laws governing import, export, transfer and

use. Delivery of Cisco cryptographic products does not imply

third-party authority to import, export, distribute or use encryption.

Importers, exporters, distributors and users are responsible for

compliance with U.S. and local country laws. By using this product you

agree to comply with applicable laws and regulations. If you are unable

to comply with U.S. and local laws, return this product immediately.

A summary of U.S. laws governing Cisco cryptographic products may be found at:

http://www.cisco.com/wwl/export/crypto/tool/stqrg.html

If you require further assistance please contact us by sending email to

export@cisco.com.

Cisco 877 (MPC8272) processor (revision 3.0) with 236544K/25600K bytes of memory.

Processor board ID FCZ11386182

MPC8272 CPU Rev: Part Number 0xC, Mask Number 0x10

4 FastEthernet interfaces

1 ATM interface

1 Virtual Private Network (VPN) Module

128K bytes of non-volatile configuration memory.

53248K bytes of processor board System flash (Intel Strataflash)

Configuration register is 0x2102

router#show region

Region Manager:

      Start         End     Size(b)  Class  Media  Name

0x0E700000  0x0FFFFFFF    26214400  Iomem  R/W    iomem

0x80000000  0x8E6FFFFF   242221056  Local  R/W    main

0x8002007C  0x82DAC93F    47761604  IText  R/W    main:text

0x82DAC940  0x83E76413    17603284  IData  R/W    main:data

0x83E76414  0x8470B08F     8998012  IBss   R/W    main:bss

0x8470B090  0x8E6FFFFF   167726960  Local  R/W    main:heap

Free Region Manager:

      Start         End     Size(b)  Class  Media  Name

router#show stack

Minimum process stacks:

Free/Size   Name

11124/12000  MRIB IPv4 Init Process

11128/12000  MRIB IPv6 Init Process

8092/9000   EEM ED RF

4184/6000   EEM Shell Director

4928/6000   Inspect Init Msg

5116/6000   SPAN Subsystem

18760/24000  Init

58608/60000  EEM Auto Registration Proc

5128/6000   SASL MAIN

4916/6000   RADIUS INITCONFIG

5096/6000   HTTP DNS Update Process

2128/3000   Rom Random Update Process

5128/6000   IP SLAs Deferred Schedule Processor

6172/9000   EEM Callback Thread

22108/24000  Virtual Exec

Interrupt level stacks:

Level    Called Unused/Size  Name

  2     1268177   5464/9000  Host/PCI Bridge Interrupt

  3      401000   5340/9000  SEC Interrupt Handler

  5       41996   8968/9000  Console Break Risc Timer Interrupt

  6        1410   8876/9000  MPC8270 Console Interrupt

  7    10830035   8892/9000  MPC8270 Timer4 Interrupt

router#

Cisco Employee

EEM script causing router to reload

This output doesn't indicate a crash.  Did you reload again after the EEM crash?

New Member

EEM script causing router to reload

No, I haven't reloaded it since.

You can see from "Last reload reason: Unknown reason" that something has gone wrong.

Any idea what in the script could be causing this behaviour?

Cisco Employee

EEM script causing router to reload

No.  If you connect to the console and reproduce the problem, what messages do you see?

New Member

EEM script causing router to reload

Hi Joseph,

Ok I'm still having this problem and have captured the console messages:

chaney-xtr#event manager run report_adsl_health_loop

Aug 19 21:25:42: %HA_EM-5-LOG: report_adsl_health_loop: Current ADSL speed is 4.4 Mbps, Noise Margin is 6.0 dB, ADSL has failed 1 times since last reboot

validblock_diagnose, code = 2

current memory block, bp = 0x86CA5334,

memorypool type is Processor

data check, ptr = 0x86CA5364

bp->next(0x0) not in any mempool

bp_prev(0xFFFFFFEC) not in any mempool

========= Dump bp = 0x86CA5334 ======================

86CA5234:  B0D0B0D 15A3C78B        0 80D60D18 86C9C82C EF4321CD 80D60B94  B0D0B0D

86CA5254: 15A3C78B        0 80D60D18 86C9C82C EF4321CD 80D60B94  B0D0B0D 15A3C78B

86CA5274:        0 80D60D18 86C9C82C EF4321CD 80D60B94  B0D0B0D 15A3C78B        0

86CA5294: 80D60D18 86C9C82C EF4321CD 80D60B94  B0D0B0D 15A3C78B        0 80D60D18

86CA52B4: 86C9C82C EF4321CD 80D60B94  B0D0B0D 15A3C78B        0 80D60D18 86C9C82C

86CA52D4: EF4321CD 80D60B94  B0D0B0D 15A3C78B        0 80D60CDC 86C9C82C EF4321CD

86CA52F4: 80D60B8C  B0D0B0D 15A3C78B        0 80D60CDC 86C9C82C EF4321CD 80D60B8C

86CA5314:  B0D0B0D 15A3C78B        0 80D60D18 86C9C82C EF4321CD 80D60B94  B0D0B0D

86CA5334: 15A3C78B        1 82071A78 86C9C82C        0        0        0   A3C78B

86CA5354:        1 80D60D18 86C9C82C        0 342E3131        0 15A3C78B        0

86CA5374: 80D60D18 86C9C82C EF4321CD 80D60B94  B0D0B0D 15A3C78B        0 80D60D18

86CA5394: 86C9C82C EF4321CD 80D60B94  B0D0B0D 15A3C78B        0 80D60CDC 86C9C82C

86CA53B4: EF4321CD 80D60B8C  B0D0B0D 15A3C78B        0 80D60D18 86C9C82C EF4321CD

86CA53D4: 80D60B94  B0D0B0D 15A3C78B        0 80D60D18 86C9C82C EF4321CD 80D60B94

86CA53F4:  B0D0B0D 15A3C78B        0 80D60D18 86C9C82C EF4321CD 80D60B94  B0D0B0D

86CA5414: 15A3C78B        1 809EE550 86C9C82C        0 5279616E        0 15A3C78B

========= Dump bp->next = 0x0 ======================

========== Dump bp->previous = 0x0 =====================

============================================

%Software-forced reload

21:26:04 AEST Mon Aug 19 2013: Unexpected exception to CPU: vector 700, PC = 0x80393A88, LR = 0x80393A20

-Traceback= 0x80393A88z 0x80393A20z 0x81FDC560z 0x82DA91F0z 0x80D60B98z 0x80D652A4z 0x80D5AE90z 0x80395CB4z 0x8037B7ECz

CPU Register Context:

MSR = 0x00029032  CR  = 0x24048082  CTR = 0x80B81134  XER   = 0x00000000

R0  = 0x80393A20  R1  = 0x862DDCC0  R2  = 0xFFF4FFF4  R3    = 0x83F1F890

R4  = 0x00000000  R5  = 0x00000000  R6  = 0x00000000  R7    = 0x00000001

R8  = 0x00000000  R9  = 0x83E70000  R10 = 0x83E70000  R11   = 0x00000000

R12 = 0x28048028  R13 = 0x8FFFFF30  R14 = 0x80D5AD30  R15   = 0x00000000

R16 = 0x00000000  R17 = 0x00000000  R18 = 0x00000000  R19   = 0x82F80000

R20 = 0x8474DD54  R21 = 0x862DE068  R22 = 0x83CD0000  R23   = 0x83E70000

R24 = 0x83E70000  R25 = 0x00000000  R26 = 0x83CD0000  R27   = 0x83E8A1D4

R28 = 0x00000000  R29 = 0x836CD928  R30 = 0x83920000  R31   = 0x00000000

TEXT_START : 0x8002007C

DATA_START : 0x82DAC940

Writing crashinfo to flash:crashinfo_20130819-212604-AEST

=== Flushing messages (21:26:06 AEST Mon Aug 19 2013) ===

Buffered messages:

Aug 19 21:25:42: %HA_EM-5-LOG: report_adsl_health_loop: Current ADSL speed is 4.4 Mbps, Noise Margin is 6.0 dB, ADSL has failed 1 times since last reboot

.Aug 19 21:26:04: %SYS-3-BADMAGIC: Corrupt block at 86CA5334 (magic 15A3C78B)

-Traceback= 80B87144z 82024D10z 81FDC560z 82DA91F0z 80D60B98z 80D652A4z 80D5AE90z 80395CB4z 8037B7ECz

Queued messages:

.Aug 19 21:26:06: %SYS-3-LOGGER_FLUSHING: System pausing to ensure console debugging output.

.Aug 19 21:26:04: %SYS-3-BADMAGIC: Corrupt block at 86CA5334 (magic 15A3C78B)

-Traceback= 80B87144z 82024D10z 81FDC560z 82DA91F0z 80D60B98z 80D652A4z 80D5AE90z 80395CB4z 8037B7ECz

.Aug 19 21:26:04: %SYS-6-MTRACE: mallocfree: addr, pc

86DD6D04,80B60C2C 86DD6D04,40000294 86DD4908,80B60C04 86DD4908,4000020A

86CA5364,80D60B94 86ACC844,80D7B0F8 86DB9C5C,80D7B0E0 86DBAD2C,82D8DCB8

.Aug 19 21:26:04: %SYS-6-MTRACE: mallocfree: addr, pc

86DBB248,600000E0 86DBB114,82D8DCA0 86DBB248,82D8DC80 847E9FC4,82D9DD6C

8492A8F4,802FB690 8492A8F4,30008050 87464968,802FB63C 87464968,30000246

.Aug 19 21:26:04: %SYS-6-BLKINFO: Corrupted magic value in in-use block blk 86CA5334, words 10733451, alloc 0, Free, dealloc 0, rfcnt 1

-Traceback= 80B87144z 81FD9458z 82025328z 81FDC560z 82DA91F0z 80D60B98z 80D652A4z 80D5AE90z 80395CB4z 8037B7ECz

.Aug 19 21:26:04: %SYS-6-MEMDUMP: 0x86CA5334: 0x15A3C78B 0x1 0x82071A78 0x86C9C82C

.Aug 19 21:26:04: %SYS-6-MEMDUMP: 0x86CA5344: 0x0 0x0 0x0 0xA3C78B

.Aug 19 21:26:04: %SYS-6-MEMDUMP: 0x86CA5354: 0x1 0x80D60D18 0x86C9C82C 0x0

.Aug 19 21:26:05: %SYS-5-CONFIG_I: Configured from console by  on vty0 (EEM:report_adsl_health_loop)CPU Register Context:

VEC = 0x00000700  PC  = 0x80393A88  MSR = 0x00029032  CR  = 0x24048082

LR  = 0x80393A20  CTR = 0x80B81134  XER = 0x00000000

R0  = 0x80393A20  R1  = 0x862DDCC0  R2  = 0xFFF4FFF4  R3  = 0x83F1F890

R4  = 0x00000000  R5  = 0x00000000  R6  = 0x00000000  R7  = 0x00000001

R8  = 0x00000000  R9  = 0x83E70000  R10 = 0x83E70000  R11 = 0x00000000

R12 = 0x28048028  R13 = 0x8FFFFF30  R14 = 0x80D5AD30  R15 = 0x00000000

R16 = 0x00000000  R17 = 0x00000000  R18 = 0x00000000  R19 = 0x82F80000

R20 = 0x8474DD54  R21 = 0x862DE068  R22 = 0x83CD0000  R23 = 0x83E70000

R24 = 0x83E70000  R25 = 0x00000000  R26 = 0x83CD0000  R27 = 0x83E8A1D4

R28 = 0x00000000  R29 = 0x836CD928  R30 = 0x83920000  R31 = 0x00000000

DEC = 0x7FFF5A84  TBU = 0x00000001  TBL = 0x020CDDAB  PVR = 0x80822014

DAR = 0x00000000  DSISR = 0x000000ÿ

*** System received a Software forced crash ***

signal= 0x17, code= 0x700, context= 0x83ed1348

PC = 0x80393a88, Vector = 0x700, SP = 0x862ddcc0

System Bootstrap, Version 12.3(8r)YI4, RELEASE SOFTWARE

Technical Support: http://www.cisco.com/techsupport

Copyright (c) 2006 by cisco Systems, Inc.

C870 series (Board ID: 1-148) platform with 262144 Kbytes of main memory

Booting flash:/c870-advipservicesk9-mz.151-4.M6.bin

[snip]

I have updated my script slightly since my earlier post, current EEM script is below. It does appear to run successfully but the router crashes soon after.

event manager applet report_adsl_health_loop

event none sync yes

action 1.0 comment Collect ADSL sync speed and format it for the log and banner output

action 1.1 info type snmp oid 1.3.6.1.2.1.10.94.1.1.2.1.8.11 get-type exact

action 1.2 divide $_info_snmp_value 1000000

action 1.3 regexp "^." "$_remainder" _match

action 1.4 set final_remainder "$_match"

action 1.5 set dsl_rate "$_result.$final_remainder"

action 2.0 comment Collect noise margin and format it for the log and banner output

action 2.1 info type snmp oid 1.3.6.1.2.1.10.94.1.1.3.1.4.11 get-type exact

action 2.2 divide $_info_snmp_value 10

action 2.3 set noise_margin "$_result.$_remainder"

action 3.0 comment Collect the number of times the ADSL interface has gone down and format it for the log and banner output

action 3.1 cli command "enable"

action 3.2 cli command "show dsl int atm0 | in Activations"

action 3.3 regexp "[0-9]+" "$_cli_result" activations

action 4.0 comment Retrieve previous ADSL health measurements or if non-existant, then set previous variables to 0

action 4.10 handle-error type ignore

action 4.11 context retrieve key key_prev_dsl_rate variable "previous_dsl_rate"

action 4.12 if $_error ne FH_EOK goto 4.20

action 4.13 handle-error type ignore

action 4.14 context retrieve key key_prev_noise_margin variable "previous_noise_margin"

action 4.15 if $_error ne FH_EOK goto 4.20

action 4.16 handle-error type ignore

action 4.17 context retrieve key key_prev_activations variable "previous_activations"

action 4.18 if $_error ne FH_EOK goto 4.20

action 4.20 set previous_dsl_rate "0"

action 4.21 set previous_noise_margin "0"

action 4.22 set previous_activations "0"

action 5.0 comment Compare current and previous adsl health measurements

action 5.10 set changes "0"

action 5.11 if $previous_dsl_rate eq $dsl_rate goto 5.20

action 5.12 increment changes 1

action 5.20 if $previous_noise_margin eq $noise_margin goto 5.30

action 5.21 increment changes 1

action 5.30 if $previous_activations eq $activations goto 5.40

action 5.31 increment changes 1

action 5.40 if $changes eq 0 goto 93.1

action 90.0 comment Record new ADSL heath in log and set banner 

action 90.1 syslog priority notifications msg "Current ADSL speed is $dsl_rate Mbps, Noise Margin is $noise_margin dB, ADSL has failed $activations times since last reboot"

action 91.1 cli command "enable"

action 91.2 cli command "conf t"

action 91.3 cli command "banner exec Z\x0aCurrent ADSL speed is $dsl_rate Mbps, Noise Margin is $noise_margin dB, ADSL has failed $activations times since last reboot\x0a\x0aZ"

action 91.4 cli command "end"

action 92.0 comment Save updated ADSL health measurements

action 92.1 context save key key_prev_dsl_rate variable "dsl_rate"

action 92.2 context save key key_prev_noise_margin variable "noise_margin"

action 92.3 context save key key_prev_activations variable "activations"

action 93.1 exit

end

end

event manager run report_adsl_health_loop

Cisco Employee

EEM script causing router to reload

This is CSCud31581.

New Member

EEM script causing router to reload

Thanks.

Looking at bug toolkit I presume I can use Add instead of Increment to get around this?

Cisco Employee

EEM script causing router to reload

Hi Ryan,

Yes that's the workaround to this bug.  Add instead of increment.

Mike

New Member

EEM script causing router to reload

That works.

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