From: Alex Kharkats (akharkats@xxxxxxxxxxxx)
Date: Thu Aug 08 2002 - 17:32:25 GMT-3
When you redistribute connected, it will become a type-5 external LSA.
That's why you don't see it in NSSA area.
Alex.
-----Original Message-----
From: jin
To: Tom Young; ccielab@groupstudy.com
Sent: 8/8/2002 12:40 AM
Subject: Re: NSSA problem
why don't you changing the network type of loopback interface on router
A to the point-to-point.
Because loopback interface is the host interface.
Please don't trust me, just try it.
thks.
----- Original Message -----
From: "Tom Young" <gitsyoung@yahoo.co.jp>
To: "Mingzhou Nie" <mnie@yahoo.com>
Cc: <ccielab@groupstudy.com>
Sent: Thursday, August 08, 2002 2:40 PM
Subject: Re: NSSA problem
> Hello, Nie
>
> You are right, for the router C, it couldn't receive
> external routes. But this time, the 1.1.1.1 is routerA's
> address, not the external(Type5) LSAs. I think routerC
> should receive it as the type 3. Stub area could receive
> the type 3 LSA right?
> If you are right, how to ping the 1.1.1.1 from C? Do a
> default-information from A?
>
> Thanks
> Young
>
> --- Mingzhou Nie <mnie@yahoo.com> ????????:
> > Remember, nssa is also a stub area with exception
> > that it will allow
> > external routes redis in(RTC in your case), so
> > external routes, or type
> > 5 LSAs from other areas including area 0 is not
> > allowed.
> >
> > To workaround it, you either have to make RTC
> > totally stubby or
> > generate a default route
> >
> > RTC
> > router ospf 1
> > area 1 nssa default-information originate
> >
> > --- Hunt Lee <ciscoforme3@yahoo.com.au> wrote:
> > > Okay folks, starting off some late nite studying
> > and just bumped into
> > > another problem.
> > >
> > > 1.1.1.1/32 -- RTA -- RTB -- RTC -- RTD -
> > 156.26.32.0/24 & 33.0/24
> > >
> > >
> > > Both RTA, B & C are using OSPF.
> > >
> > > RTA & RTB are in OSPF Area 0
> > > RTB & RTC are in NSSA Area 1
> > >
> > > RTC also uses RIP v2, so it's an ASBR
> > > And RTD uses RIPv2
> > >
> > > RTA's interface to RTB - 10.1.1.1
> > > RTB's interface back to RTA - 10.1.1.2
> > > RTB's interface to RTC - 10.1.1.5
> > > RTC's interface back to RTB - 10.1.1.6
> > > RTC's interface to RTD - 10.1.1.10
> > > RTD's interface back to RTC - 10.1.1.9
> > >
> > > RTD advertise the 2 networks 156.26.32.0/24 &
> > 156.26.33.0/24 with
> > > RIPv2.
> > >
> > > RTC is doing mutual redistribution, where the
> > RIPv2 is being
> > > redistributed into OSPF, and OSPF is being
> > redistributed back into
> > > RIP.
> > >
> > > Here's my question, RTA has a Loopback interface
> > (1.1.1.1/32) and it
> > > is being redistributed into OSPF at RTA:-
> > >
> > > router ospf 1
> > > log-adjacency-changes
> > > redistribute connected subnets
> > > network 10.1.1.0 0.0.0.3 area 0
> > >
> > > RouterA#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, ia - IS-IS
> > > inter area
> > > * - candidate default, U - per-user static
> > route, o - ODR
> > > P - periodic downloaded static route
> > >
> > > Gateway of last resort is not set
> > >
> > > 1.0.0.0/32 is subnetted, 1 subnets
> > > C 1.1.1.1 is directly connected, Loopback0
> > > 156.26.0.0/24 is subnetted, 2 subnets
> > > O E2 156.26.32.0 [110/20] via 10.1.1.2,
> > 01:36:22, Serial0
> > > O E2 156.26.33.0 [110/20] via 10.1.1.2,
> > 01:36:22, Serial0
> > > 10.0.0.0/30 is subnetted, 3 subnets
> > > O E2 10.1.1.8 [110/20] via 10.1.1.2, 01:36:22,
> > Serial0
> > > C 10.1.1.0 is directly connected, Serial0
> > > O IA 10.1.1.4 [110/128] via 10.1.1.2, 01:37:34,
> > Serial0
> > > RouterA#
> > >
> > >
> > > And at RTB, I can still see the route (1.1.1.1/32)
> > as O E2...
> > >
> > > RouterB#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, ia - IS-IS
> > > inter area
> > > * - candidate default, U - per-user static
> > route, o - ODR
> > > P - periodic downloaded static route
> > >
> > > Gateway of last resort is not set
> > >
> > > 1.0.0.0/32 is subnetted, 1 subnets
> > > O E2 1.1.1.1 [110/20] via 10.1.1.1, 01:37:18,
> > Serial0
> > > 2.0.0.0/32 is subnetted, 1 subnets
> > > C 2.2.2.2 is directly connected, Loopback0
> > > 156.26.0.0/24 is subnetted, 2 subnets
> > > O N2 156.26.32.0 [110/20] via 10.1.1.6,
> > 01:37:18, Serial1
> > > O N2 156.26.33.0 [110/20] via 10.1.1.6,
> > 01:37:18, Serial1
> > > 10.0.0.0/30 is subnetted, 3 subnets
> > > O N2 10.1.1.8 [110/20] via 10.1.1.6, 01:37:18,
> > Serial1
> > > C 10.1.1.0 is directly connected, Serial0
> > > C 10.1.1.4 is directly connected, Serial1
> > > RouterB#
> > >
> > > But at RTC, the route disappears!!!
> > >
> > > RouterC#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, ia - IS-IS
> > > inter area
> > > * - candidate default, U - per-user static
> > route, o - ODR
> > > P - periodic downloaded static route
> > >
> > > Gateway of last resort is not set
> > >
> > > 3.0.0.0/24 is subnetted, 1 subnets
> > > C 3.3.3.0 is directly connected, Loopback0
> > > 156.26.0.0/24 is subnetted, 2 subnets
> > > R 156.26.32.0 [120/1] via 10.1.1.9,
> > 00:00:02, Serial1
> > > R 156.26.33.0 [120/1] via 10.1.1.9,
> > 00:00:02, Serial1
> > > 10.0.0.0/30 is subnetted, 3 subnets
> > > C 10.1.1.8 is directly connected, Serial1
> > > O IA 10.1.1.0 [110/128] via 10.1.1.5, 01:38:50,
> > Serial0
> > > C 10.1.1.4 is directly connected, Serial0
> > > RouterC#
> > >
> > > RouterB#sh ip ospf database
> > >
> > > OSPF Router with ID (2.2.2.2) (Process
> > ID 2)
> > >
> > > Router Link States (Area 0)
> > >
> > > Link ID ADV Router Age Seq#
> > Checksum Link count
> > > 1.1.1.1 1.1.1.1 1655 0x80000005
> > 0x6B0D 2
> > > 2.2.2.2 2.2.2.2 984 0x80000008
> > 0x867 2
> > >
> > > Summary Net Link States (Area 0)
> > >
> > > Link ID ADV Router Age Seq#
> > Checksum
> > > 10.1.1.4 2.2.2.2 1728 0x80000004
> > 0xF5EE
> > >
> > > Router Link States (Area 1)
> > >
> > > Link ID ADV Router Age Seq#
> > Checksum Link count
> > > 2.2.2.2 2.2.2.2 984 0x80000009
> > 0xC787 2
> > > 10.1.1.10 10.1.1.10 874 0x80000007
> > 0x54EE 2
> > >
> > > Summary Net Link States (Area 1)
> > >
> > > Link ID ADV Router Age Seq#
> > Checksum
> >
> === message truncated ===
>
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