From: ccie anees (ccieanees@yahoo.com)
Date: Fri Dec 29 2006 - 17:18:36 ART
Hi Narbik,
As per Ali's scenario, if Area 2 is NSSA, can we generate default route from R4 with the default-infrormation originate always?
That's his question.
Anees.
Narbik Kocharians <narbikk@gmail.com> wrote:
Here I have R1 (131.1.12.1/24) connecting to R2 (131.1.12.2/24)via their F0/0 and these routers are in area 1.
R2 (131.1.23.2/24) and R3 (131.1.23.3/24) are connected to each other via their F0/1 interface and these routers are in area 0.
R3 (131.1.34.3/24) and R4 (131.1.34.4/24) are connected to each other via their F0/0 interface and these routers are in Area 2.
Based on this topology R2 is the ABR connecting area 1 to area 0.
R3 is also an ABR connecting area 2 to area 0.
R4#sh run | b router
router ospf 1
router-id 4.4.4.4
log-adjacency-changes
default-information originate always
R3#sh ip route ospf
O IA 1.0.0.0/8 [110/3] via 131.1.23.2, 00:01:33, FastEthernet0/1
2.0.0.0/32 is subnetted, 1 subnets
O 2.2.2.2 [110/2] via 131.1.23.2, 00:02:43 , FastEthernet0/1
O 4.0.0.0/8 [110/2] via 131.1.34.4, 00:01:33 , FastEthernet0/0
131.1.0.0/24 is subnetted, 3 subnets
O IA 131.1.12.0 [110/2] via 131.1.23.2 , 00:01:33, FastEthernet0/1
O*E2 0.0.0.0/0 [110/1] via 131.1.34.4, 00:01:33, FastEthernet0/0
R3#show ip ospf border-routers
OSPF Process 1 internal Routing Table
Codes: i - Intra-area route, I - Inter-area route
i 4.4.4.4 [1] via 131.1.34.4, FastEthernet0/0, ASBR, Area 2, SPF 6
i 2.2.2.2 [1] via 131.1.23.2, FastEthernet0/1, ABR, Area 0, SPF 10
On 12/29/06, Narbik Kocharians <narbikk@gmail.com> wrote: What is the scenario?
On 12/29/06, Ali Sheeraz Mehdi <ali.mehdi@atosorigin-me.com > wrote: I already have an ASBR and have to originate a default route in my scenario and ABR is not ASBR here. I have tried default-information originate always on ASBR but it is not working as well. I have also tried ip route 0.0.0.0/0 and redistribute static even then it is not generating a default route.
Regards
Ali
---------------------------------
From: Narbik Kocharians [mailto: narbikk@gmail.com]
Sent: Friday, December 29, 2006 8:41 PM
To: ali.mehdi@atosorigin-me.com
Cc: ccie anees; nagendra kumar; ccielab@groupstudy.com
Subject: Re: NSSA - default-information-originate
If the ASBR is also the ABR you could do "area xx nssa default-information" but if it is not, then when a router injects a default route its considered to be an ASBR.
On 12/29/06, Ali Sheeraz Mehdi < ali.mehdi@atosorigin-me.com> wrote:
Should I use default-information originate always or area X nssa default-information originate; which one should work?
Regards
---------------------------------
From: Narbik Kocharians [mailto: narbikk@gmail.com]
Sent: Friday, December 29, 2006 8:32 PM
To: Ali Sheeraz Mehdi
Cc: ccie anees; nagendra kumar; ccielab@groupstudy.com
Subject: Re: NSSA - default-information-originate
Well the ASBR can also be the ABR, but if it is not, try default-information that will work.
On 12/29/06, Ali Sheeraz Mehdi < ali.mehdi@atosorigin-me.com> wrote:
Anees,
This is exactly what I have experienced in my lab. ASBR is not generating
any default route.
Any comments
Regards
Ali
_____
From: ccie anees [mailto:ccieanees@yahoo.com]
Sent: Friday, December 29, 2006 8:08 PM
To: nagendra kumar; Ali Sheeraz Mehdi; ccielab@groupstudy.com
Subject: Re: NSSA - default-information-originate
Hi,
I don't think ASBR in NSSA can generate Default route. the only command
applicable in the Intra area routers or ASBR in NSSA are area X nssa.
All the area X nssa <options> are applicable in ABR NSSA router or ABR and
ASBR NSSA router.
This is what I see in the lab practice. Please correct me if I am wrong.
Thanks,
Anees.
a kumar < nagendranainar@yahoo.co.in> wrote:
HI Ali,
Yes. You can configure ASBR in NSSA to generate default route. You have to
confiure the ABR as "area nssa" and in ASBR configure "area nssa
default-information-originate". By this you will get Inter-area routes from
ABR into this NSSA area and a default router from ASBR.
To suppress N2 within NSSA, you need to configure "area 2 nssa
no-redistribute default-information-originate" in ASBR.
Regards,
Nagendra
Ali Sheeraz Mehdi wrote: Hi Guys,
Can ASBR in NSSA generate a default route (if ABR and ASBR are not the same
routers); also can we suppress N2 routes within NSSA maintaining the full
reachability?
Regards
Ali
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