From: Plukkie (plukkie@gmail.com)
Date: Mon Aug 28 2006 - 06:24:36 ART
Hi,
I would presume only allowing the common vlans that are used on both
switches, so that is 100 and 28.
on both switches:
switchport trunk allowed vlan 28,100
gr Plukkie
On 8/28/06, David Redfern (AU) <David.Redfern@didata.com.au> wrote:
>
> Guys,
>
> Struggling to find the correct way to emulate vtp pruning using
> switchport trunk allowed vlan command..
>
> Question is from InternetExpert Lab 28
> Also says to only send the minumum amount of traffic necessary across
> these trunk links
>
>
>
> Eg,
>
> Sw1 has hosts in vlan 100,28,46,5
> Also has interface vlan 7 (but no interfaces in the vlan)
>
> Sw2 has hosts in vlans 34,100
> Also has interface vlan 8 and 28 (but no interfaces in the vlan)
>
>
> What do you guys think is the correct solution.
>
> Solution 1.(only allows vlan traffic to other side that both switches
> have hosts in. eg 100)
> SW1.
> switchport trunk allowed vlan 100
>
> SW2
> switchport trunk allowed vlan 100
>
>
>
> Solution 2. (allows vlan traffic to other side that the OTHER side has
> hosts in as well as interface vlans ((28) where this traffic must
> traverse the trunk)
> SW1
> switchport trunk allowed vlan 34,100,28
>
> SW2
> switchport trunk allowed vlan 100,28,46,5
>
>
> Solution 3. (allows vlan traffic to other side that the OTHER side has
> hosts in as well as all interface vlans on the other side)
> SW1
> switchport trunk allowed vlan 34,100,28,8
>
> SW2
> switchport trunk allowed vlan 100,28,46,5,7
>
>
>
>
> Solution 4, (Their solution. Confused about the logic)
>
> SW1.
> switchport trunk allowed vlan 7.28,100
> SW2
> switchport trunk allowed vlan 8.28.100
>
>
> Or others
>
> Any ideas about the best way?
>
>
>
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