Re: Caveats for switch trunk?

Hello Robin-

The explanation below is from a VTP troubleshooting document from
Cisco, ID # 98155:

When the number of allowed VLANs extends past a certain number of
characters, which is the default terminal width, the show running
bconfig command wraps the line and adds the switchport trunk allowed
vlan add command to the line. This is the way Cisco handles long lists
in the switchport trunk allowed vlan command.

Thanks,

Keith H. Barker, CCIE #6783
Senior CCIE Instructor
http://www.INE.com

Internetwork Expert, Inc.
Toll Free: 877-224-8987
Outside US: 775-826-4344

On Oct 5, 2009, at 8:01 AM, Robin Betterley wrote:

> Hi Group,
>
> i noticed that after i issued the 'switchport trunk allow vlan
> a,b,c,d,e,f,g,h,i,j,k,l etc...'
>
> the sh run display:
>
> switchport trunk allow vlan a,b,c,d,e,f,g,h
> switchport trunk allowed vlan add i,j,k,l etc...
>
> Is there any specific reason why the IOS would append the 2 line with
> the remaining vlans?
>
> Is there really a limitation to how many vlans IOS can display in a
> singular line?
>
> It didnt really bother me until when i try to: switchport trunk allow
> vlan a,b,c,d,e,f,g,h,Z
>
> the sh run display:
>
> switchport trunk allow vlan a,b,c,d,e,f,g,h
> switchport trunk allowed vlan add Z
>
> it apparently DELETE my vlans for i,j,k,l etc... for the 2nd line :(
>
> Well i guess i learn it the hard way. BUT Is there really a limitation
> to how many vlans IOS can display in a singular line?
>
>
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Received on Mon Oct 05 2009 - 13:15:41 ART