From: CCIE To Be (ccie.tobe81@gmail.com)
Date: Sun Jan 11 2009 - 19:31:56 ARST
THANKS a lot Anthony.
On Sat, Jan 10, 2009 at 11:30 PM, Anthony Sequeira <
asequeira@internetworkexpert.com> wrote:
> 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 <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/><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/><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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>>
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