From: Joe Harris (JoeH@xxxxxxxxxxxxxxxxx)
Date: Tue Aug 29 2000 - 18:15:53 GMT-3
Yes, By defining the area as a nssa, you are allowing the area to announce
external routes, even though it does not receive external routes. A NSSA
uses type-7 LSA's that allow redistribution to accour within them. So by
adding the no-summary command to the area <area> nssa you are not allowing
the ABR send summary LSA into NSSA.
Hope this helps
-Joe
-----Original Message-----
From: Paul Borghese [mailto:pborghese@groupstudy.com]
Sent: Tuesday, August 29, 2000 4:05 PM
To: Joe Harris
Subject: Re: NSSA in OSPF
Thanks!
Do you know what area 1 nssa no-summary is suppose to do?
Paul
----- Original Message -----
From: "Joe Harris" <JoeH@globaldatasys.com>
To: "Paul Borghese" <pborghese@groupstudy.com>
Sent: Tuesday, August 29, 2000 4:58 PM
Subject: RE: NSSA in OSPF
> You need to configure the ABR like so:
>
> area 1 nssa default-information-orginate
>
> Then your ABR will inject a default route into the nssa area. Look below:
>
> R2 - ABR
> router ospf 50
> network 135.7.32.0 0.0.0.255 area 1
> network 135.7.22.0 0.0.0.255 area 1
> network 135.7.2.0 0.0.0.255 area 1
> network 135.7.25.0 0.0.0.255 area 5
> area 1 virtual-link 135.7.3.1
> area 5 nssa default-information-originate
>
> R5 - stub router in area 5
> R5#sh ip route
> Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
> D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
> N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
> E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
> i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, * - candidate
> default
> U - per-user static route, o - ODR, P - periodic downloaded static
> route
> T - traffic engineered route
>
> Gateway of last resort is 135.7.25.2 to network 0.0.0.0
>
> C 192.192.1.0/24 is directly connected, Loopback1
> 135.7.0.0/16 is variably subnetted, 14 subnets, 2 masks
> O IA 135.7.134.4/32 [110/138] via 135.7.25.2, Ethernet0
> O IA 135.7.134.3/32 [110/74] via 135.7.25.2, Ethernet0
> O IA 135.7.134.1/32 [110/202] via 135.7.25.2, Ethernet0
> O IA 135.7.1.1/32 [110/203] via 135.7.25.2, Ethernet0
> O IA 135.7.3.1/32 [110/75] via 135.7.25.2, Ethernet0
> O IA 135.7.2.1/32 [110/11] via 135.7.25.2, Ethernet0
> O IA 135.7.4.1/32 [110/139] via 135.7.25.2, Ethernet0
> C 135.7.5.0/24 is directly connected, Loopback0
> O IA 135.7.6.1/32 [110/85] via 135.7.25.2, Ethernet0
> O IA 135.7.22.0/24 [110/16] via 135.7.25.2, Ethernet0
> C 135.7.25.0/24 is directly connected, Ethernet0
> O IA 135.7.32.0/24 [110/74] via 135.7.25.2, Ethernet0
> C 135.7.35.0/24 is directly connected, BRI0
> O IA 135.7.36.0/24 [110/84] via 135.7.25.2, Ethernet0
> O*N2 0.0.0.0/0 [110/1] via 135.7.25.2, Ethernet0
>
> - Joe
>
> -----Original Message-----
> From: Paul Borghese [mailto:pborghese@groupstudy.com]
> Sent: Tuesday, August 29, 2000 3:48 PM
> To: Lawrence Dwyer
> Cc: ccielab@groupstudy.com
> Subject: Re: NSSA in OSPF
>
>
> I do not believe this will work (but it might I am not in front of a
router)
>
> area 1 stub
> area 1 nssa
>
>
> Paul
> ----- Original Message -----
> From: "Lawrence Dwyer" <dwyer@tatrc.org>
> To: "Paul Borghese" <paul98@prodigy.net>
> Cc: <ccielab@groupstudy.com>
> Sent: Tuesday, August 29, 2000 4:33 PM
> Subject: Re: NSSA in OSPF
>
>
> > Did you define the area as a stub first?
> > Larry
> >
> > Paul Borghese wrote:
> >
> > > Ok, this is driving me crazy. If I setup a network as an NSSA area
> using
> > > the command:
> > >
> > > area 1 nssa
> > >
> > > a default route does not get propagated by the ABR. If I enter the
> > > command -
> > >
> > > area 1 nssa no-summary
> > >
> > > a default route does get propagated into the NSSA. But Inter-Area
> routes
> > > are also propagated into the area. You would think the no-summary
> command
> > > would operate similar to that of "area 1 stub no-summary" and not
allow
> IA
> > > routes.
> > >
> > > Plus the no-summary command under nssa is not documented in either the
> 11.3
> > > or 12.1 documentation.
> > >
> > > Ok, so what is going on? What am I missing?
> > >
> > > Paul Borghese
> > >
This archive was generated by hypermail 2.1.4 : Thu Jun 13 2002 - 08:24:32 GMT-3