Monthly Archives: September 2018

Comware7: Configuration commit delay

In the old days it was quite common to schedule a device reboot e.g. 5 min ahead when ‘tricky’ remote device changes had to be performed over an in-band connection such as SSH/telnet. In case the config changes provided the desired result, the reboot would be cancelled. When the changes would have resulted in a lost management connection, the reboot would have reverted the device state to the previous config (assuming no ‘save’ was done).

Comware 7 now has a similar feature but without the device reboot, so this is an online ‘swap’ of the configuration without the reboot delay.

Note: This command is a one-off command, it is not saved in config and it needs to re-entered every time it is needed.

First set the time in the future when the auto-rollback is supposed to happen

[5900G-1]configuration commit delay ?
 INTEGER<1-65535>  Delay time in minutes
[5900G-1]configuration commit delay 2

%Jan  1 04:11:58:463 2011 5900G-1 SHELL/5/SHELL_COMMIT_DELAY: A configuration rollback will be performed in 2 minutes.

Now a config change is made, for example, the G1/0/1 description is set to ‘demo’

[5900G-1]int g1/0/1
[5900G-1-GigabitEthernet1/0/1]description demo1

Review the running config with the applied change

[5900G-1-GigabitEthernet1/0/1]dis cur int g1/0/1


 #
 interface GigabitEthernet1/0/1
 port link-mode bridge
 description demo1
 #
 return

When the administrator does not confirm the applied changes with the ‘commit’ command within the set delay time, the device will automatically rollback the configuration.

%Jan  1 04:08:28:315 2011 5900G-1 SHELL/5/SHELL_COMMIT_ROLLBACK: The configuration commit delay is overtime, a configuration rollback will be performed.
%Jan  1 04:08:36:403 2011 5900G-1 SHELL/5/SHELL_COMMIT_ROLLBACKDONE: The configuration rollback has been performed.

Now the running config has been reverted to the state before the commit delay was entered

[5900G-1-GigabitEthernet1/0/1]dis cur int g1/0/1
 #
 interface GigabitEthernet1/0/1
 port link-mode bridge
 #
 return

When the admin decides that the changes are fine, the configuration commit can be used. This will cancel the pending timer.

Again some configuration change is made

[5900G-1-GigabitEthernet1/0/1]description demo2
 [5900G-1-GigabitEthernet1/0/1]quit

Now the configuration commit is used

[5900G-1]configuration commit
%Jan  1 04:09:30:268 2011 5900G-1 SHELL/5/SHELL_COMMIT: The configuration has been committed.

And the running configuration now contains the applied changes

[5900G-1-GigabitEthernet1/0/1]dis cur int g1/0/1
#
 interface GigabitEthernet1/0/1
 port link-mode bridge
 description demo2
 #
 return

6509 went to ROMMON

A 6509 crashed and it went to ROMMON like this

System Bootstrap, Version 8.5(2)
Copyright (c) 1994-2007 by cisco Systems, Inc.
Cat6k-Sup720/SP processor with 524288 Kbytes of main memory

rommon 1 > boot
Initializing ATA monitor library...
string is bootdisk:s72033-ipservicesk9_wan-mz.122-33.SXH2a.bin
Loading image, please wait ...

Well, IOS and the boot image are there. Yet still no joy.

6509#sh bootv
BOOT variable = sup-bootdisk:,1;
CONFIG_FILE variable = 
BOOTLDR variable = 
Configuration register is 0x2102

Standby is not present.
6509#dir
Directory of sup-bootdisk:/

    1  -rw-    74573284   Aug 6 2008 23:02:28 +10:00  s72033-ipservicesk9_wan-mz.122-33.SXH2a.bin
    2  -rw-    33554432   Aug 7 2008 08:27:28 +10:00  sea_log.dat
    3  -rw-      137219   Oct 9 2008 15:04:02 +11:00  crashinfo_20081009-040403

512106496 bytes total (403832832 bytes free)
6509#conf t
Enter configuration commands, one per line.  End with CNTL/Z.
6509(config)#boot system flash sup-bootflash:s72033-ipservicesk9_wan-mz.122-33.SXH2a.bin
6509(config)#do wr
Building configuration...
[OK]
6509(config)#exit
6509#sh run | i boot
boot-start-marker
boot system flash sup-bootflash:s72033-ipservicesk9_wan-mz.122-33.SXH2a.bin
boot-end-marker
6509(config)#do wr
Building configuration...
[OK]
6509(config)#exit
6509#reload
Proceed with reload? [confirm]
Oct 15 16:28:20.057 AEDT: %SYS-SP-3-LOGGER_FLUSHING: System pausing to ensure console debugging output.
Oct 15 16:28:20.057 AEDT: %OIR-SP-6-CONSOLE: Changing console ownership to switch processor
Oct 15 16:28:23.337 AEDT: %SYS-SP-3-LOGGER_FLUSHING: System pausing to ensure console debugging output.

***
*** --- SHUTDOWN NOW ---
***

Oct 15 16:28:23.337 AEDT: %SYS-SP-5-RELOAD: Reload requested
Oct 15 16:28:23.337 AEDT: %OIR-SP-6-CONSOLE: Changing console ownership to switch processor

System Bootstrap, Version 8.5(2)
Copyright (c) 1994-2007 by cisco Systems, Inc.
Cat6k-Sup720/SP processor with 524288 Kbytes of main memory


rommon 1 > 

Apparently, this is what I needed to do.

rommon 1 > dir bootflash:
Initializing ATA monitor library...
Directory of bootflash:

2      74573284  -rw-     s72033-ipservicesk9_wan-mz.122-33.SXH2a.bin
936    33554432  -rw-     sea_log.dat
13202    137219    -rw-     crashinfo_20081009-040403

rommon 2 > set
PS1=rommon ! > 
LOG_PREFIX_VERSION=1
SLOTCACHE=cards;
SWITCH_NUMBER=0
BOOT=bootflash:,1;bootflash:s72033-ipservicesk9_wan-mz.122-33.SXH2a.bin,1;
RET_2_RTS=16:39:18 AEDT Wed Oct 15 2008
NT_K=0:0:0:0
CV=bootdisk:s72033-ipservicesk9_wan-mz.122-33.SXH2a.bin
BSI=0
RET_2_RCALTS=
PF_REDUN_CRASH_COUNT=0
RANDOM_NUM=655707222
?=0

rommon 3 > BOOT=s72033-ipservicesk9_wan-mz.122-33.SXH2a.bin

rommon 4 > sync

rommon 5 > set
PS1=rommon ! > 
LOG_PREFIX_VERSION=1
SLOTCACHE=cards;
SWITCH_NUMBER=0
RET_2_RTS=16:39:18 AEDT Wed Oct 15 2008
NT_K=0:0:0:0
CV=bootdisk:s72033-ipservicesk9_wan-mz.122-33.SXH2a.bin
BSI=0
RET_2_RCALTS=
PF_REDUN_CRASH_COUNT=0
RANDOM_NUM=655707222
BOOT=s72033-ipservicesk9_wan-mz.122-33.SXH2a.bin
?=0
rommon 6 > confreg 2102
rommon 7 > reset