From: Anthony Sequeira (asequeira@internetworkexpert.com)
Date: Sat Jan 10 2009 - 17:30:42 ARST
Yes - I would include it. In fact - a nice rule of thumb in the exam
is if in doubt in a situation like this - include it. Often times we
are not penalized for over-configuration.
I kept asking my proctor about VLANs 1002-1005 at one point and his
response of - RELAX - really taught a lesson. . .the grading did not
care if they were there or not! Here is was worried to death about
something that was completely irrelevant to my score.
With most tasks - you want to look and think to yourself - "OK, what
are they really looking for here - what does this X number of points
really depend on..."
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 2:22 PM, CCIE To Be wrote:
> Yes, I mis understood and thaught that VLAN 1 is also considered as
> default
> vlan.
>
> Now let suppose VLAN 1 is not being used in the network for data
> traffic but
> it is being used by switches for propagating self generated traffic (
> STP,VTP etc ). So it should be included now in odd vlan list ?
>
>
> THANKS
>
> On Sat, Jan 10, 2009 at 10:31 PM, Anthony Sequeira <
> asequeira@internetworkexpert.com> wrote:
>
>> 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 <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/
>>>> ><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
>>>>>
>>>>>
>>>>> Blogs and organic groups at http://www.ccie.net
>>>>>
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>>>>>
>>>>
>>>
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>>>
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>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
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