From: George Cassels (glcassels3@nc.rr.com)
Date: Wed Feb 26 2003 - 13:09:46 GMT-3
George good point I forgot how it will also drop itself below any
currently configured switches. I can Also see your point on why you
hard code. I think there are pros and cons to both methods as stated by
everyone. It comes down to what you feel comfortable with and knowing
that both commands will accomplish the job.
Regards,
George
-----Original Message-----
From: groupstudy@bekmezian.com [mailto:groupstudy@bekmezian.com]
Sent: Wednesday, February 26, 2003 10:51 AM
To: George Cassels
Cc: ccielab@groupstudy.com; nobody@groupstudy.com; 'Tran Tien Phong'
Subject: RE: Root switch
That is true, but you are leaving out some crucial information:
The spanning-tree root primary alters this switch's bridge priority to
8192. If that does not result in this switch becoming root, then the
bridge priority is changed to 100 less than the bridge priority of the
current bridge. If this does not succeed, an error will result.
So, not only does it drop the priority to 8192, it will continue
modifying the priority until the election of primary is accomplished.
The down side to this method is that someone else can bring a switch up
with a priority of 0 and take over the election. That is why I
recommend hard coding this value in the lab.
Regards,
George Bekmezian
CCIE# 10704
"George Cassels" <glcassels3@nc.rr.com>
Sent by: nobody@groupstudy.com
02/26/2003 06:04 AM
Please respond to
"George Cassels" <glcassels3@nc.rr.com>
To
"'Tran Tien Phong'" <PhongTT2@fpt.com.vn>, <ccielab@groupstudy.com>
cc
Subject
RE: Root switch
The spanning-tree vlan 11 root primary is just a macro that knocks the
default 32768 priority to 8192. If you add the secondary key word is
changes it to 16384. So basically the commands do the same thing just
one is a macro that changes the priority for you.
Regards,
George
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Tran Tien Phong
Sent: Wednesday, February 26, 2003 6:52 AM
To: ccielab@groupstudy.com
Subject: Root switch
Hi Group,
If the question asks me to configure the switch as root switch for vlan
11, which of the below commands should be used?
- spanning-tree vlan 11 priority 0
- spanning-tree vlan 11 root primary
Both of them will work well but which one do you prefer?
Thanks
Phong
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