From: Anthony Sequeira (asequeira@internetworkexpert.com)
Date: Sat Jan 10 2009 - 16:31:09 ARST
Sorry if I confused you here. . .
I brought up the Default VLANs in my post when you had not. The
default VLANs on the switches are VLANs 1002-1005. These are Cisco
defaults for FDDI and Token Ring and they cannot be deleted. There is
also the issue of VLAN 1 (named default).
In the exam, if I am asked to manipulate all odd VLANs - I go ahead
and include 1, 1003, and 1005. If I am asked only to manipulate the
odd VLANs I am actually using - it will certainly exclude 1003 and
1005. I would then want to look over the lab scenario to see if I am
using VLAN 1 or not. If VLAN 1 is used, go ahead and include it.
As a security best practice in the real world - VLAN 1 is eliminated
from use. Obviously the lab exam might not reflect this however.
Anthony J. Sequeira, CCIE #15626, CCSI #23251
Senior CCIE Instructor
asequeira@internetworkexpert.com
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
Toll Free: 877-224-8987
Outside US: 775-826-4344
On Jan 10, 2009, at 1:03 PM, CCIE To Be wrote:
> Hi,
>
> If I am getting this right , you are saying that we should NOT include
> default vlan if task is asking for specific vlans being used in
> topology. If
> task is asking in general ( ALL VLANs ) then we should include
> default vlan
> ??
>
> On Sat, Jan 10, 2009 at 7:36 PM, Anthony Sequeira <
> asequeira@internetworkexpert.com> wrote:
>
>> This is an area where I believe we tend to think too much. I can
>> remember
>> being freaked out about the Default VLANs in a question like this
>> and what
>> to do about them. The proctor at RTP let me know at the time that I
>> was just
>> worrying too darn much.
>>
>> If I am asked to make the switch the root for the odd numbered
>> VLANs - I
>> include ALL odd numbered VLANs (except the default VLANs) and I
>> move on. I
>> suppose it would be a bit trickier if it was specified to do this
>> for all
>> VLANs used in your particular Lab paper. Now I am implementing the
>> command
>> just for the VLANs we use and I am being sure to catch any that
>> might be
>> created outside of the Switching section.
>>
>> Anthony J. Sequeira, CCIE #15626, CCSI #23251
>> Senior CCIE Instructor
>>
>> asequeira@internetworkexpert.com
>>
>> Internetwork Expert, Inc.
>> http://www.InternetworkExpert.com <http://
>> www.internetworkexpert.com/>
>> Toll Free: 877-224-8987
>> Outside US: 775-826-4344
>>
>>
>> On Jan 10, 2009, at 5:31 AM, CCIE To Be wrote:
>>
>> Dear Group,
>>>
>>> If I have a requirement to make one switch e.g SwitchA 'root' for
>>> odd
>>> vlans
>>> and other switch SwitchB 'root' for even switch. My question is
>>> that, do I
>>> need to INCLUDE VLAN 1 in the odd vlan list while making a switch
>>> primary
>>> for odd vlans ??
>>>
>>> If we talk about 'allowed vlan' on trunk then it is clear that we
>>> don't
>>> need
>>> to INCLUDE VLAN 1 in allowed vlan list because its a system vlan
>>> and STP,
>>> VTP etc traffic will be passed across the trunks even VLAN 1 is not
>>> implicitly included in allowed vlan list. What about above
>>> scenario ?
>>>
>>>
>>> Thanks
>>>
>>>
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>>>
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>
>
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