From: Reed, John (John.D.Reed@xxxxxxxxxx)
Date: Sun Dec 19 1999 - 12:22:39 GMT-3
Michael,
The Set SPANTREE priority is used for determining the likeihood of becoming
the Root bridge, during bridge root elections. The lowest priority wins.
the Set SPANTREE PORTVLANPRI is used when you have multiple TRUNK ports
connecting two VTP-domain members. In a normal network with equal portvlan
priorities, the traffic is split evenly across the trunk member links.
When you assign a specific VLAN with a low priority setting for a
trunk-link, then the traffic for that vlan will prefer that trunk link.
So, If I did this: (assuming that ports 1/1 and 1/2 are my ISL trunk
ports)
set spantree portvlanpri 1/1 1 5-10
set spantree portvlanpri 1/2 1 11-15
Then vlans 5 through 10 would use port 1/1, and vlans 11 through 15 would
use port 1/2. (unless one of the ports broke, and then all of the vlans
would use the available port.
JR
-----Original Message-----
From: Michael Law [mailto:htluo@cisco.com]
Sent: Saturday, December 18, 1999 10:03 PM
To: ccielab@groupstudy.com
Subject: set spantree priority
Maybe it's a stupid question, but what's the difference between
'set spantree priority' and 'set spantree portvlanpri' ?
Michael
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