September 2018

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

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 ...

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 >

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

Month: September 2018

Comware7: Configuration commit delay

6509 went to ROMMON