From: De Witt, Duane (duane.dewitt@siemens.com)
Date: Wed Oct 19 2005 - 15:10:33 GMT-3
I'll try to explain better:
We have vlan 26,52,2,3,4,5 on SW1
We have vlan 26,53,6,7,8,9 on SW2
According to the solution the allowed list on SW1 trunk is 26,53,6,7,8,9
and the allowed list on SW2 trunk is 26,52,2,3,4,5.
The way I see it is VLAN 26 and 52 are the common VLAN's to both
switches so should technically be the only traffic traversing the trunk,
so I don't understand why the other VLAN's would be allowed.
As far as I know pruning is the process of eliminating unwanted
broadcast traffic over trunks to switches that don't have any ports in
the VLAN that the broadcast is in. So if SW1 has a broadcast frame on
VLAN 3 it would not go to SW2 with pruning enabled because there are no
ports on SW2 that are in VLAN 3. This leads me to believe that only VLAN
26 and 52 should be allowed.
I'd appreciate any input on this, I can't work it out.
-----Original Message-----
From: kgannon@gmail.com [mailto:kgannon@gmail.com] On Behalf Of kevin
gannon
Sent: 19 October 2005 07:58 PM
To: De Witt, Duane
Cc: Cisco certification
Subject: Re: manual VTP pruning
Not sure of what exactly you mean by "all VLAN's on the remote
switch". If you mean there is a VLAN allowed list on the trunk on
only one end then this would work fine as the traffic willl be dropped
on reciept ?
Regards
Kevin
On 10/19/05, De Witt, Duane <duane.dewitt@siemens.com> wrote:
> Hi All
>
>
>
> In IEWB V1 Lab 16 VTP is running in transparent mode between the two
> switches. The requirement is to manually configure the network to
behave
> like pruning is enabled.
>
> The only VLAN's common to both switches is 22 and 55, so my logic
tells
> me that those are the only VLAN's that should be allowed on the trunk.
> The solution however allows all VLAN's on the remote switch.
>
>
>
> Any ideas why this is?
>
>
>
> Regards
>
> Duane
>
>
>
> ____________________________________________
> SIEMENS Siemens Business Services
> Siemens Service Center
>
> 126 14th Road
>
> Erand Gardens
>
> Midrand
>
> South Africa
>
>
>
> * +27 11 5452555
> * +27 83 4452768
> * +27 11 5415219
> * duane.dewitt@siemens.com <mailto:duane.dewitt@siemens.com>
>
>
This archive was generated by hypermail 2.1.4 : Sun Nov 06 2005 - 22:00:51 GMT-3