Re: OSPF Virtual Links

I agree that's normal practice but the question said to summarize those routes on R3 (ABR) so R4 has the summary. Would you still do area 5 range on the R3 ABR if the summary is only supposed to be in area 3?

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On Jun 22, 2010, at 7:28 PM, Narbik Kocharians <narbikk_at_gmail.com> wrote:

> To add to what Adrian and Bob mentioned, remember that the "area range"
> command specifies the area that the specific routes are generated.
>
>
> On Tue, Jun 22, 2010 at 4:05 PM, Bob Sinclair <bob_at_bobsinclair.net> wrote:
>
>> Quick thought: If they are area 5 routes, then shouldn't the summary
>> command be "area 5 range..." I believe the command references the source
>> area.
>>
>> HTH,
>>
>> -Bob Sinclair
>>
>>> -----Original Message-----
>>> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
>>> cgrammer_at_essilorusa.com
>>> Sent: Tuesday, June 22, 2010 6:52 PM
>>> To: ccielab_at_groupstudy.com
>>> Subject: OSPF Virtual Links
>>>
>>> I am having a difficult time finding information regarding a detailed
>>> explanation of OSPF virtual links with regards to route summarization
>>> on the
>>> remote end of the virtual link router.
>>>
>>> I am working on a practice lab that:
>>>
>>> (area5) R1 --(area0)--- R2 ----(area1) ---R3 ---(area3) --- R4
>>>
>>> The requirement is to connect R2 to R3 with a virtual link to allow
>>> area5
>>> routes to be propagated to R4.
>>> 1.1.0.0/24
>>> 1.1.1.0/24
>>> 1.1.2.0/24
>>> 1.1.3.0/24
>>>
>>> The routes show up on R4 as expected, but the next requirement is to
>>> summarize
>>> the routes at R3 so that it shows up as 1.1.0.0/22 on R4.
>>>
>>> Since R3 is now a member of Area0, I would think i can use
>>> area 0 range 1.1.0.0 255.255.252.0
>>>
>>> But,this doesn't work.
>>> It seems that there are some peculiar characteristics regarding virtual
>>> links
>>> and area 0, but there isn't much documentation outside of the
>>> rudimentary
>>> explanation and troubleshooting commands.
>>>
>>> Thanks in advance for everyones help,
>>>
>>>
>>> Chris
>>>
>>>
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>>
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>
>
> --
> Narbik Kocharians
> CCSI#30832, CCIE# 12410 (R&S, SP, Security)
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Received on Tue Jun 22 2010 - 19:38:35 ART