From: Keith Steller (ksteller@attbi.com)
Date: Mon Sep 02 2002 - 13:58:36 GMT-3
Thanks for the responses Landon and Pete. Shouldn't those type 7's be
converted to type 5's though. I cant see those routes period. I could be
missing something.
Thanks again!
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Landon Fitts
Sent: Monday, September 02, 2002 11:26 AM
To: Keith Steller; ccielab@groupstudy.com
Subject: Re: NSSA and type 7 LSA's
Keith.
This is correct behavior. The ASBR that is part of the NSSA sends the RIP
routes as LSA type 7 (N2/N1), but the ABR sends those LSAs out as type 5
(E2/E1) into the backbone. The type 7 LSAs are only distributed within the
NSSA area.
Landon
----- Original Message -----
From: "Keith Steller" <ksteller@attbi.com>
To: <ccielab@groupstudy.com>
Sent: Monday, September 02, 2002 11:26 AM
Subject: NSSA and type 7 LSA's
> Hello All-
>
> I have a question for someone. I have an NSSA configured to allow
> redistibution of a few RIP routes into the OSPF net. I have everything
> working fine except for one thing. I can see the RIP routes, denoted by
the
> N2 in the routing table on the ABR where the "Area X NSSA" is configured.
I
> dont see those type 7 routes being advertised to other routers in the OSPF
> network though. I'm wondering if that's correct behavior. I can get
> connectivity to the RIP net (146.10.18.x) when I add the "default
> information originate always" on the ABR with the NSSA, as he can see the
> RIP routes from there. With that configured, everyone sends packets to him
> when they dont have a route available. Shouldnt the NSSA allow the RIP
> network to be advrtised to all routers in the OSPF network? I attached the
> configs below. R1 is the ASBR with RIP and OSPF. R2 is the other end of
the
> NSSA ABR (connected to Area 0), and R5 is also on th backbone on area 0.
>
> Thanks for the assistance,
>
> Keith
>
> R1
> !
> router ospf 100
> redistribute rip subnets
> passive-interface TokenRing0
> network 146.10.11.0 0.0.0.255 area 11
> network 146.10.21.0 0.0.0.3 area 21
> default-metric 5
> area 11 range 146.10.11.0 255.255.255.0
> area 21 nssa
> !
> router rip
> version 1
> redistribute ospf 100 metric 10
> passive-interface Loopback100
> passive-interface Serial1
> network 146.10.0.0
> neighbor 146.10.18.8
> !
> r1#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
>
> Gateway of last resort is 146.10.21.2 to network 0.0.0.0
>
> 146.10.0.0/16 is variably subnetted, 6 subnets, 2 masks
> C 146.10.18.0/24 is directly connected, TokenRing0
> C 146.10.21.0/30 is directly connected, Serial1
> C 146.10.11.0/24 is directly connected, Loopback100
> R 146.10.88.0/24 [120/1] via 146.10.18.8, 00:00:17, TokenRing0
> R 146.10.78.0/24 [120/1] via 146.10.18.8, 00:00:17, TokenRing0
> C 146.10.118.0/24 is directly connected, Loopback200
> O*IA 0.0.0.0/0 [110/65] via 146.10.21.2, 00:12:41, Serial1
> r1#
> ***************************************
> R2
> !
> router ospf 100
> network 146.10.10.0 0.0.0.255 area 0
> network 146.10.21.0 0.0.0.3 area 21
> network 146.10.22.0 0.0.0.255 area 22
> neighbor 146.10.10.6 priority 1
> neighbor 146.10.10.5 priority 5
> default-information originate always
> area 21 nssa default-information-originate no-summary
> area 22 range 146.10.22.0 255.255.255.0
> !
>
> r2#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
>
> Gateway of last resort is not set
>
> 146.10.0.0/16 is variably subnetted, 12 subnets, 3 masks
> C 146.10.24.0/24 is directly connected, Serial0.1
> O N2 146.10.18.0/24 [110/5] via 146.10.21.1, 00:14:30, Serial1
> C 146.10.21.0/30 is directly connected, Serial1
> C 146.10.22.0/24 is directly connected, Loopback100
> C 146.10.10.0/24 is directly connected, Serial0
> O N2 146.10.11.0/24 [110/5] via 146.10.21.1, 00:14:30, Serial1
> O IA 146.10.57.0/25 [110/74] via 146.10.10.6, 00:14:30, Serial0
> [110/74] via 146.10.10.5, 00:14:30, Serial0
> O IA 146.10.55.0/24 [110/65] via 146.10.10.5, 00:14:30, Serial0
> O N2 146.10.88.0/24 [110/5] via 146.10.21.1, 00:14:30, Serial1
> O N2 146.10.78.0/24 [110/5] via 146.10.21.1, 00:14:30, Serial1
> O IA 146.10.66.0/24 [110/65] via 146.10.10.6, 00:14:30, Serial0
> O N2 146.10.118.0/24 [110/5] via 146.10.21.1, 00:14:30, Serial1
> r2#
> Type-7 AS External Link States (Area 21)
>
> Link ID ADV Router Age Seq# Checksum Tag
> 146.10.11.0 146.10.118.1 445 0x80000002 0xF944 0
> 146.10.18.0 146.10.118.1 445 0x80000002 0xAC8A 0
> 146.10.21.0 146.10.118.1 445 0x80000002 0x79BD 0
> 146.10.78.0 146.10.118.1 445 0x80000002 0x16E4 0
> 146.10.88.0 146.10.118.1 445 0x80000002 0xA749 0
> 146.10.118.0 146.10.118.1 445 0x80000002 0x5C76 0
> ****************************************************
> R5
> !
> router ospf 100
> network 146.10.10.0 0.0.0.255 area 0
> network 146.10.55.0 0.0.0.255 area 55
> network 146.10.57.0 0.0.0.127 area 57
> neighbor 146.10.10.2 priority 10
> area 55 range 146.10.55.0 255.255.255.0
> !
> 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
>
> Gateway of last resort is 146.10.10.2 to network 0.0.0.0
>
> 146.10.0.0/16 is variably subnetted, 6 subnets, 3 masks
> O IA 146.10.21.0/30 [110/128] via 146.10.10.2, 00:16:28, Serial0.501
> O IA 146.10.22.0/24 [110/65] via 146.10.10.2, 00:16:28, Serial0.501
> C 146.10.10.0/24 is directly connected, Serial0.501
> C 146.10.57.0/25 is directly connected, Ethernet0
> C 146.10.55.0/24 is directly connected, Loopback55
> O IA 146.10.66.0/24 [110/65] via 146.10.10.6, 00:16:28, Serial0.501
> 146.100.0.0/24 is subnetted, 1 subnets
> C 146.100.55.0 is directly connected, Loopback100
> O*E2 0.0.0.0/0 [110/1] via 146.10.10.2, 00:16:21, Serial0.501
> r5#
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