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Tricky One - Can Backbone router learn default route from NSSA?
R1 is not the ABR. R3 is the ABR and therefore the one who should inject the 0/0 route. HTH, Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, JNCIE #153, CISSP, et al. CCSI/JNCI-M/JNCI-J IPExpert VP - Curriculum Development IPExpert Sr. Technical Instructor smorris@ipexpert.com http://www.ipexpert.com
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From: CCIEin2006 [mailto:ciscocciein2006@gmail.com] Sent: Monday, July 31, 2006 6:39 AM To: swm@emanon.com Cc: Cisco certification Subject: Re: Tricky One - Can Backbone router learn default route from NSSA?
Basically the setup looks like this: (R1)–Area100–(R3)–Area0 | Area100 | (R2) R1, R2, and R3 are connected to Area100 which is a NSSA. R3 is also connected to Area0. R1 is configured with Area 100 nssa default-information-originate. Both R2 and R3 see the 0.0.0.0 route in their OSPF database but only R2 actually enters the route in its routing table. R3 is not entering the route in its routing table. Can you explain why that is? I figured it might have something to do with R3 being connected to Area0 but I’m not sure…. Thanks
On 7/30/06, Scott Morris wrote:
NSSA doesn’t inject a default route automagically. You need to put it on the command line:
Area 100 nssa default-information-originate
Every other stub area type does automagically give you 0/0, but nssa does not.
Is that the problem you were running into?
Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, JNCIE #153, CISSP, et al. CCSI/JNCI-M/JNCI-J IPExpert VP - Curriculum Development IPExpert Sr. Technical Instructor smorris@ipexpert.com http://www.ipexpert.com
—–Original Message—– From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of CCIEin2006 Sent: Sunday, July 30, 2006 8:28 PM To: Cisco certification Subject: Tricky One - Can Backbone router learn default route from NSSA?
I was doing one of the vendor labs and for some reason the backbone routers was not accepting a default route from its neighbor in a nssa. Is there a rule against this?
