[AusNOG] Vlan Add - Was Re: Work experience in networking/telecoms/DCs? Getting my foot in the door?

[Alexander Neilson]

Maybe I was just being silly but when I started with Cisco switches I just started by copying the whole existing line, editing the VLAN list, then hit enter.

Then one day I made the list long enough that IOS automatically made it two lines, one with the vlan xxx,xxx-xxx,xxx and one with the vlan add xxx.

That was how I learned the add command.

As I had done more juniper and mikrotik before (both which help avoid this issue) and being warned about not putting a command in without being 110% sure that the command I have does what I want then I would probably have made this same error (or just have typed “set vlan members xxx”)

Doesn’t mean I haven’t made any other mistakes, like adding the first additional Switch to a 3750G stack having done software upgrades to bring the stack in line and forgetting to check the boot times. We all make mistakes, but thankfully I had already downloaded the full config from the repository before I started, thank goodness I didn’t get fired for that.

Regards
Alexander

Alexander Neilson
Neilson Productions Limited

alexander at neilson.net.nz
021 329 681
022 456 2326

> On 24/12/2014, at 3:27 pm, PRK <ausnog at digitaljunkie.net> wrote:
> 
> Is there anyone here who either:
> 
> a) Hasn't done the vlan xxx instead of vlan add xxx?
> 
> or
> 
> b) Hasn't directly seen the vlan xxx instead of vlan add xxx done?
> 
> Or, if you're more of a systems person, haven't locked yourself out of a server due to a firewall change, or directly seen someone else do so?
> 
> Or, if you're a DBA, done an update to a database table and missed the where clause, overwriting every single record?
> 
> I'd consider these fairly common errors that almost everyone makes, once, and a fantastic way to evaluate someone's response under pressure. They're also fantastic teachable moments (once resolved) as to why certain company processes and procedures exist.
> 
> I'd probably be concerned if the same person made the same mistake more than once, though.
> 
> prk.
> 
>  
> On 2014-12-23 20:48, Andy S. wrote:
> 
>> I just remember one of my mate told a story about one particular CCIE doing "switchport trunk allowed vlan xxx" instead of "switchport trunk allowed vlan add xxx" and caused an outage. Companies losing money (according to him. It's a stock trading company). Though it's weird they needed more time to address where the issue was. 
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