[c-nsp] VLAN problem

[amir agha]

I am writing a EEM using Cisco ios cli, can anyone have valuable suggestion about how to materialize it. Following is the topic
> Using following command on switch i.e
>
> switchport trunk allowed vlan <add/remove/all/except/none> <range>
>
> However, if one forgets to include the <add/remove/all/except/none> keyword, the command defaults to replace:
>
> switchport trunk allowed vlan <range>
>
> the VLAN that has already been placed on vlan deleted and result in downtime
>
>I would like to disable the use of: "switchport trunk allowed vlan <range>",
>
> and replace it with a custom EEM command like:
>
>     1.switchport trunk allowed vlan none.
>     2. switchport trunk allowed vlan add <add> <range>
>     3. switchport trunk allowed vlan add <remove> <range>

> This would correct a dangerous IOS syntax.

 
Anyone having any idea about this??????