Re: OSPF router-id and net 0.0.0.0 in the LAB

I'm with Anthony on this one. I wouldn't count on being explicitly
told what to do with router-id. Sometimes things need to be understood
to be solved correctly. There are things that can interfere with OSPF
router-id selections and those interferences are fair game for the lab
exam.

Now, as far as the original question about setting router-id manually,
my recommendation is: Unless you are explicitly told NOT to set it
manually, do it. If you are told NOT to do it - don't.

Using "network 0.0.0.0 255.255.255.255 area X" is dangerous, as others
have pointed out. If you are certain that there will not be additional
interfaces later in the lab that are not supposed to be advertised
into OSPF, this is a perfectly valid solution of the task.

--
Marko Milivojevic - CCIE #18427
Senior Technical Instructor - IPexpert
FREE CCIE training: http://bit.ly/vLecture
Mailto: markom_at_ipexpert.com
Telephone: +1.810.326.1444
Web: http://www.ipexpert.com/
On Wed, Aug 11, 2010 at 01:51, Anthony Sequeira <asequeira_at_ine.com> wrote:
> First of all - the word ALWAYS and the CCIE lab tasks simply do not often get along - thank goodness.
>
> Second of all - when I am a proctor and we have written a lab that does not ever mention Router ID for OSPF and a candidate asks me what to do about it - my answer - "keep it simple".
>
> So I am afraid I cannot agree with either statement provided here.
>
> Sent from my iPhone
>
> On Aug 10, 2010, at 9:21 PM, "Kambiz Agahian" <aussiecert_at_gmail.com> wrote:
>
>> Jack,
>>
>> The OSPF router-id is one of the things that they always tell you what to do
>> about. If not then that's a fair proctor question.
>>
>> HTH
>> Kambiz Agahian
>>
>> CCIE Instructor/Consultant
>> M.Eng Telecom, CCIE# 25341, CCSI# 33326, MCSE, MCSA
>>
>>
>> On Tue, Aug 10, 2010 at 1:57 PM, Jack Router <pan.router_at_gmail.com> wrote:
>>
>>> Hello,
>>>
>>> In the LAB:
>>> Is it safe to assign OSPF router id on a router even if not instructed ?
>>> Also, if task just says "configure R1 in OSPF area 0", is it safe to type
>>> "net 0.0.0.0 0.0.0.0 are 0"
>>> Did you or will you use those commands ?
>>>
>>> Thanks,
>>>
>>>
>>> Blogs and organic groups at http://www.ccie.net
>>>
>>> _______________________________________________________________________
>>> Subscription information may be found at:
>>> http://www.groupstudy.com/list/CCIELab.html
>>
>>
>> Blogs and organic groups at http://www.ccie.net
>>
>> _______________________________________________________________________
>> Subscription information may be found at:
>> http://www.groupstudy.com/list/CCIELab.html
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
Blogs and organic groups at http://www.ccie.net