From: Scott Morris (swm@emanon.com)
Date: Wed Jul 09 2008 - 21:24:33 ART
That is true. That would be two separate elections though (per VLAN or per
MST instance). But yes, if a lab scenario is generically worded, that would
be a method to accomplish that!
Scott Morris, CCIE4 #4713, JNCIE-M #153, JNCIS-ER, CISSP, et al.
CCSI/JNCI-M/JNCI-ER
Senior CCIE Instructor
smorris@internetworkexpert.com
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
Toll Free: 877-224-8987 x 705
Outside US: 775-826-4344 x 705
24/7 Support: http://forum.internetworkexpert.com
Live Chat: http://www.internetworkexpert.com/chat/
Knowledge is power.
Power corrupts.
Study hard and be Eeeeviiiil......
-----Original Message-----
From: Huan Pham [mailto:Huan.Pham@peopletelecom.com.au]
Sent: Wednesday, July 09, 2008 7:18 PM
To: Scott Morris; John; ccielab@groupstudy.com
Subject: RE: Can you make a root port a designated port?
Hi,
We can make a switch the root for some set of VLANs, and non-root for
another set of VLANs.
Similarly, we can make a switch port a root port for one set of VLANs, and a
designated port for another set of VLANs.
Depending on the exact wording of the question, making a port both a root
port and a designated port can be complished.
Cheers,
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Scott Morris
Sent: Thursday, 10 July 2008 3:31 AM
To: 'John'; ccielab@groupstudy.com
Subject: RE: Can you make a root port a designated port?
It's not possible to be both. Think about it...
A root port is your SWITCH's decision that this is the best path back to the
root bridge.
A designated port is the LINK's "decision" that this is the best path back
to the root bridge.
Assume we're talking a link from Cat1-Cat2. So if the link elects Cat2 as
the designated port, that means that everything from downstream
(Cat1) should see that as the best path. If Cat2 tries to say that same
port is the root port, that means everything FROM Cat2 goes out the port (in
collision with the first statement).
So logically we'd have some difficulty there. Designated port is a "come to
me" idea. Root port is an "I'll go this way" idea.
HTH,
Scott Morris, CCIE4 #4713, JNCIE-M #153, JNCIS-ER, CISSP, et al.
CCSI/JNCI-M/JNCI-ER
Senior CCIE Instructor
smorris@internetworkexpert.com
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
Toll Free: 877-224-8987 x 705
Outside US: 775-826-4344 x 705
24/7 Support: http://forum.internetworkexpert.com
Live Chat: http://www.internetworkexpert.com/chat/
Knowledge is power.
Power corrupts.
Study hard and be Eeeeviiiil......
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of John
Sent: Wednesday, July 09, 2008 12:23 PM
To: ccielab@groupstudy.com
Subject: Can you make a root port a designated port?
I have a switch with 3 connections to another switch that is the root.
One of the connections is a dot1q trunk. I'm tasked with making it a
designated port. I have tried a number of configurations and I've come to
realize that I cant make it designated because that would mean that one of
the other ports has to become root. If I could then make make the port
designated I have a loop.
Ports going to the root can only have two states root forwarding or altn
blocking right?
Can anyone see a way to accomplish this? besides making my switch the root?
This archive was generated by hypermail 2.1.4 : Mon Aug 04 2008 - 06:11:54 ART