From: Colin Barber (Colin.Barber@telewest.co.uk)
Date: Thu Oct 17 2002 - 05:00:00 GMT-3
The 'Trunking vlans active' lists the ones being sent. The 'prunning vlans
enabled' shows the vlans that are allowed to be prunned. Therefore vlans 5,
8-199 and 201-1001 are being prunned (assuming that they all exist).
Prunning is different from removing a vlan. When a vlan is prunned no user
data from that vlan is sent across the trunk however spanning tree is still
sent on that vlan. When a vlan is removed no information on the vlan is
sent. Prunning is also dynamic so that if the remote switch suddenly
requires a prunned vlan it will be added back into the active trunking
vlans.
Colin
-----Original Message-----
From: Jay [mailto:ccienxtyear@hotmail.com]
Sent: 17 October 2002 02:24
To: ccielab@groupstudy.com
Subject: CAT3550 prunning
Hi,
When you do show vtp stat on a 3550, what is :
Trunking vlans active: 1-4,6,7,200
Prunning vlans enabled: 4-6,8-1001
Does this mean that vlans 1-4,6,7,200 are allowed on the Trunk and vlans
2,3,7
are prunned.
switchport trunk allowed vlan remove - I know this removes vlans from the
trunk that you don't want to send to other switches
switchport trunk pruning vlan -doesn't this do the same as above ?
Am getting confused. Please clarify.
thanks,
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