From: Vishal Patel (vpatel@accessproviders.com.au)
Date: Fri Aug 11 2006 - 08:34:30 ART
Hi,
According to my understanding ,
If two switches are connected by a trunk and they are in the same VTP domain
and pruning is enabled
Now, if we configure vlan X in one switch , then that vlan X will be
automatically configured in the other switch ( assuming both the switches
are servers or the other one is client).
But if there is no active port for vlan X on the other switch , then the
data traffic for that vlan will not pass to the other switch.
VTP information and vlan mgmt information will pass , but the data traffic
for a vlan will not pass.
I think connecting ethereal to a switch , will really give a good insight.
Cheers
Vishal
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of Tim
Chan
Sent: Friday, 11 August 2006 4:22 PM
To: ccielab@groupstudy.com
Subject: trunk allowed vs pruning
Hi all,
I keep confusing myself and need some clarification.
What's the relationship between "vtp pruning" and "switchport trunk
allowed"?
In one of the workbook labs, one of the tasks states:
1. although it does not have it locally assigned ensure that SW1 receives
traffic for vlan 8 over Fast0/13 2. traffic for vlan 8 should not be
received over any of the other trunk links.
(The two switches are trunked together on Fast0/13-15 using dot1q.)
So my thinking is to do "switchport trunk allowed vlan 8" on fast0/13 and to
not allow it on 14 & 15.
But the solution says the answer is "switchport trunk pruning vlan
2-7,9-1001".
How does this solution solve either of the two tasks?
Please advise,
-tim
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