Good habit = Good Engineer

If you have good habit to working as engineer, you will be good engineer. How is be good habit ?
I have little trick for be good habit, always enable timestamp every time you action, what is engineer action ? typing command in console. how ?


## JunOS: Juniper Operationg System


to enable :
user@NODE_reN> set cli timestamp 
May 22 15:38:19
CLI timestamp set to: %b %d %T


to disable :
user@NODE_reN> set cli timestamp disable 
CLI timestamp disabled


Unfortunately Cisco iOS doesn't have this feature :-(

Chassis Redundancy in Juniper

Juniper can be have dual routing-engine, it can be maintenance router always running even one of routing-engine is failed to operation. But in case if you want to change one routing-engine failed be carefull to make sure routing-engine master is disabled chassis redundancy, it is not mandatory but is better yo always disabled before you unplug failed and plug good routing-engine. Why ?


Example case :
RE0 : master
RE1 : backup


- chassis redundancy enabled


- RE0 failed, so RE1 now as master
- RE0 -> change routing-engine
- RE0 still as backup


- make sure RE1 is chassis redundancy disabled


> configure
# deactivate chassis redundancy
...


> show configuration chassis redundancy 
##
## inactive: chassis redundancy
##
failover {
    on-loss-of-keepalives;
    on-disk-failure;
}
graceful-switchover;


? Because if RE1 chassis redundancy enabled, when plug good routing-engine in RE0, RE0 will automaticly get configuration from RE1 (master).


It will not be service impact, but for safety procedure, better to disabled it.

Survival Mode at last day in March

Today i think is good day for survival mode :D
What is survival mode ? sm is day is nothing to do, almost boring time so ... in the moment almost bored I learn another activity never to do before, today is #seos, this posting I copy paste from my twitter @awamini.


#seos smart edge operating system
#seos has 3 partition mandatory p01 p02 /flash os-image will install in p01 and p02, one as active other as alternate, /flash as unix-based
#seos next cli to verify and identify os
#seos show version -> will show current version of se os
#seos show release -> will display os installed in active and alternate partition, p01 can as active and p02 as alternate or vs
#seos to upgrade os will install in alternate partition first after success can make it active as active partition
#seos release download -> to download os-image from ftp
#seos verify with show release
#seos if ok, you can make alternate partition as active with command 'release upgrade' se will reboot and boot use new os version
#seos downtime only during you're running release upgrade, se will reboot and boot with new os


survival mode is over for today #seos will be continue next time