Re: MPLS and OSPF Area 0 Hierarchy

Dear Syed,

As you said " the MPLS super backbone does the JOB for AREA 0 in case
customer is not doing it (Area 1 to Area 1)" , It is not like
that.Customer OSPF areas has no relation with MPLS Super Backbone
Area. It is just forward routes to other side. If there is no MPLS
SuperBackbone Area so we will see these routes as an external routes
due to redistribution(MP-BGP) (even customers are in same Area 1)

 We can use IS-IS in the P-network. MPLS SuperBackbone Area still can
use for customers OSPF routes.

Regards,
Anser

On Mon, Feb 8, 2010 at 7:03 PM, Syed Khalid Ali
<khalid_khursheed_at_hotmail.com> wrote:
>
>
>
> Thank you for the reply. The way I understand it, the MPLS super backbone does the JOB for AREA 0 in case customer is not doing it (Area 1 to Area 1)
>
> ________________________________
>> Date: Mon, 8 Feb 2010 09:39:34 -0500
>> Subject: Re: MPLS and OSPF Area 0 Hierarchy
>> From: all.from.nj_at_gmail.com
>> To: manserkhan_at_gmail.com
>> CC: khalid_khursheed_at_hotmail.com; ccielab_at_groupstudy.com
>>
>> I hear some lab testing coming up ... ;-)
>>
>> Team - I am not trying to state the obvious here ... but ... this is a must lab test for the v4 lab. If you have not already done so, try this and then use the show commands ...
>>
>>
>> Cool stuff. I had read this before, but until I actually labbed it, it did not make as much sense.
>>
>> A suggestion would be to lab this and then post the quirky behavior you find!
>>
>> HTH,
>>
>> Andrew Lissitz
>>
>>
>>
>> .
>> On Mon, Feb 8, 2010 at 8:50 AM, Muhammad Anser Khan> wrote:
>>
>> Dear Syed,
>>
>>
>>
>> I dont think so that two different areas will communicate through MPLS
>>
>> SuperBackbone Area 0. This Superbackbone Area has different meaning
>>
>> compared to DMVPN.
>>
>>
>>
>> Following are the scenarios are possible from CE :
>>
>>
>>
>> Area 0 to Area 0
>>
>> Area 0 to Area 1
>>
>> Area 1 to Area 1
>>
>>
>>
>> Sham links usually used when we have backdoor links for the same area.
>>
>>
>>
>> This MPLS SuperBackbone Area 0 used for "Internal OSPF Routes Across
>>
>> MPLS VPN Backbone" with the help of BGP Extended Communities for OSPF.
>>
>>
>>
>> Regards,
>>
>> Anser
>>
>>
>>
>> On Fri, Feb 5, 2010 at 6:53 PM, Syed Khalid Ali
>>
>>> wrote:
>>
>>> Group:
>>
>>> I need clarification on how area 0 is maintained across MPLS networks between customer network. Some of the example I am going through right now are something like this:
>>
>>> CE1(OSPF A1)--(PE1)--P1---P2--CE2(OSPF A2)
>>
>>>
>>
>>> OSPF (in area 0) is running on SP network (only). Now in a typical DMVPN environment, Area 0 is maintained across the WAN for each site of the customer.Area_1--site_1---Area_0---site_2--Area_2.
>>
>>> How does it related to this Area 0 concepts?
>>
>>>
>>
>>> ThanksKhalid
>>
>>>
>>
>>>
>>
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>>
>>
>> --
>> Andrew Lee Lissitz
>> all.from.nj_at_gmail.com
>
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Received on Mon Feb 08 2010 - 21:45:40 ART