From: Hunt Lee (huntl@webcentral.com.au)
Date: Fri Feb 21 2003 - 01:59:15 GMT-3
Hi Carlo,
That's exactly my point... if I redistribute BGP into OSPF at R5, shouldn't
the BGP route get into the OSPF as LSA Type 7??
Hunt
-----Original Message-----
From: Carlos [mailto:cchorao@xtra.co.nz]
Sent: Friday, 21 February 2003 1:05 PM
To: Hunt Lee
Cc: ccielab@groupstudy.com
Subject: Re: IBGP redistribution mystery
Hunt,
The purpose of NSSA is to enable the area to have stub capablities ( i.e
no lsa 5's in the area) but still allowing into originate external routes
(as type 7 lsa's). A default route must be injected at the abr if the
routers inside the nssa need to reach type 5 lsa's destinations.
Tx
Carlos
Telecom New Zealand - Advanced Solutions Group : Network Design and Security
----- Original Message -----
From: "Hunt Lee" <huntl@webcentral.com.au>
To: "'Carlos'" <cchorao@xtra.co.nz>
Cc: <ccielab@groupstudy.com>
Sent: Friday, February 21, 2003 3:28 PM
Subject: RE: IBGP redistribution mystery
> Correctly me if I'm wrong, but I thought the whole point of NSSA is to
allow
> "external routes" to get in while having Stub area capability at the same
> time???
>
> Or am I completely off??
>
> Best Regards,
> Hunt Lee
>
>
> -----Original Message-----
> From: Carlos [mailto:cchorao@xtra.co.nz]
> Sent: Friday, 21 February 2003 10:02 AM
> To: Hunt Lee; ccielab@groupstudy.com
> Subject: Re: IBGP redistribution mystery
>
>
> Hunt,
>
> if r5-r6 is a nssa , then no type 5 lsa enter the area. Net 200.200.200.0
is
> a type 5. Why should it appear on R6 ?
>
>
>
>
> Carlos
> Telecom New Zealand - Advanced Solutions Group : Network Design and
Security
> ----- Original Message -----
> From: "Hunt Lee" <ciscoforme3@yahoo.com.au>
> To: <ccielab@groupstudy.com>
> Sent: Thursday, February 20, 2003 2:35 AM
> Subject: IBGP redistribution mystery
>
>
> > Hi Group,
> >
> > Just got a funny stuff. Remember how they said that with "bgp
> > redistribute-internal", one can then redistribute IBGP routes into IGP
> (like OSPF).
> > Well... I just got a wierd one, perhaps some of you can try. Here is
the
> topology
> >
> > r4---EBGP---r3---OSPF Frame---r1---OSPF Frame---r5---NSSA---r6
> >
> > So now, what I did, I put a "redistribute bgp 3" at r5 under OSPF
process,
> but the
> > IBGP route just doesn't want to get into the NSSA area.
> >
> > router ospf 1
> > log-adjacency-changes
> > area 4 authentication
> > area 4 nssa default-information-originate
> > area 4 default-cost 20
> > redistribute bgp 3 metric 20 subnets
> > network 10.10.1.5 0.0.0.0 area 0
> > network 11.1.1.5 0.0.0.0 area 4
> >
> > router bgp 3
> > no synchronization
> > bgp redistribute-internal
> > bgp log-neighbor-changes
> > neighbor 10.10.1.1 remote-as 3
> >
> >
> > Here is the routing table of r5
> >
> > B 200.200.200.0/24 [200/0] via 10.10.1.3, 03:33:03
> > 137.20.0.0/24 is subnetted, 1 subnets
> > O IA 137.20.20.0 [110/138] via 10.10.1.1, 00:00:25, Serial0
> > 22.0.0.0/24 is subnetted, 1 subnets
> > B 22.1.1.0 [200/0] via 10.20.1.1, 00:51:42
> > 10.0.0.0/8 is variably subnetted, 11 subnets, 4 masks
> > O 10.10.1.1/32 [110/64] via 10.10.1.1, 00:00:26, Serial0
> > C 10.10.0.0/16 is directly connected, Serial0
> > O 10.10.1.3/32 [110/128] via 10.10.1.1, 00:00:26, Serial0
> > O IA 10.3.1.1/32 [110/129] via 10.10.1.1, 00:00:27, Serial0
> > O IA 10.1.0.0/17 [110/65] via 10.10.1.1, 00:00:27, Serial0
> > O IA 10.4.0.0/16 [110/202] via 10.10.1.1, 00:00:27, Serial0
> > O IA 10.20.0.0/16 [110/128] via 10.10.1.1, 00:00:27, Serial0
> > O IA 10.44.1.1/32 [110/193] via 10.10.1.1, 00:00:28, Serial0
> > B 10.44.0.0/16 [200/0] via 10.10.1.3, 03:33:05
> > O IA 10.34.0.0/16 [110/192] via 10.10.1.1, 00:00:28, Serial0
> > O IA 10.33.1.0/25 [110/129] via 10.10.1.1, 00:00:28, Serial0
> > 11.0.0.0/16 is subnetted, 4 subnets
> > O N1 11.3.0.0 [110/21] via 11.1.1.6, 00:00:28, Ethernet0
> > O N1 11.2.0.0 [110/21] via 11.1.1.6, 00:00:28, Ethernet0
> > C 11.1.0.0 is directly connected, Ethernet0
> > O N1 11.4.0.0 [110/21] via 11.1.1.6, 00:00:28, Ethernet0
> > 30.0.0.0/24 is subnetted, 1 subnets
> > B 30.1.2.0 [200/0] via 10.10.1.3, 03:33:05
> > O*E2 0.0.0.0/0 [110/1] via 10.10.1.1, 00:00:28, Serial0
> > R5#
> >
> > ANd here is the OSPF database
> >
> > Type-7 AS External Link States (Area 4)
> >
> > Link ID ADV Router Age Seq# Checksum Tag
> > 0.0.0.0 11.1.1.5 1167 0x80000008 0x66D 0
> > 10.44.0.0 11.1.1.5 670 0x80000002 0x336 2
> > 11.2.0.0 11.2.1.1 910 0x80000006 0x845E 0
> > 11.3.0.0 11.2.1.1 910 0x80000006 0x7869 0
> > 11.4.0.0 11.2.1.1 910 0x80000006 0x6C74 0
> > 22.1.1.0 11.1.1.5 671 0x80000002 0xDB85 0
> > 30.1.2.0 11.1.1.5 671 0x80000002 0xED60 2
> > 200.200.200.0 11.1.1.5 671 0x80000002 0x5BB9 2
> >
> > Type-5 AS External Link States
> >
> > Link ID ADV Router Age Seq# Checksum Tag
> > 0.0.0.0 10.20.1.1 1052 0x80000007 0x2765 1
> > 10.44.0.0 11.1.1.5 672 0x80000002 0xE470 2
> > 11.2.0.0 11.1.1.5 50 0x80000001 0x13DB 0
> > 11.3.0.0 11.1.1.5 50 0x80000001 0x7E6 0
> > 11.4.0.0 11.1.1.5 50 0x80000001 0xFAF1 0
> > 22.1.1.0 11.1.1.5 672 0x80000002 0x1F56 0
> > 30.1.2.0 11.1.1.5 672 0x80000002 0xCF9A 2
> > 200.200.200.0 11.1.1.5 672 0x80000002 0x3DF3 2
> > R5#
> >
> > And for r6's OSPF database:
> >
> >
> > Type-7 AS External Link States (Area 4)
> >
> > Link ID ADV Router Age Seq# Checksum Tag
> > 0.0.0.0 11.1.1.5 1204 0x80000008 0x00066D 0
> > 10.44.0.0 11.1.1.5 708 0x80000002 0x000336 2
> > 11.2.0.0 11.2.1.1 946 0x80000006 0x00845E 0
> > 11.3.0.0 11.2.1.1 946 0x80000006 0x007869 0
> > 11.4.0.0 11.2.1.1 946 0x80000006 0x006C74 0
> > 22.1.1.0 11.1.1.5 708 0x80000002 0x00DB85 0
> > 30.1.2.0 11.1.1.5 708 0x80000002 0x00ED60 2
> > 200.200.200.0 11.1.1.5 708 0x80000002 0x005BB9 2
> > R6#
> >
> > But nothing shows up in routing table of r6
> >
> > R6#sh ip route 200.200.200.0
> > % Network not in table
> > R6#
> >
> >
> > Any help / ideas would be greatly appreciated.
> >
> > Regards,
> > Hunt
> >
> > http://mobile.yahoo.com.au - Yahoo! Mobile
> > - Exchange IMs with Messenger friends on your Telstra or Vodafone mobile
> phone.
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