From: Granofsky, Aaron (AGranofsky@xxxxxxxxxxx)
Date: Mon Oct 16 2000 - 14:41:05 GMT-3
Title: RE: Area 0 interface in OSPF db as Type 5 LSA??
As you stated the route did show up in my routing table as connected,
but it showed up in the OSPF database as external.
r2#sh ip os da
OSPF Router with ID (170.10.25.2) (Process ID 1)
<snip>
Type-5 AS External Link States
Link ID ADV Router Age Seq# Checksum Tag
170.10.1.0 170.10.25.2 443 0x80000001 0xDF0 0
The lab that I was working on is Fatkid.com's #501.
Since I posted this question I tore the lab down and started a new
one. But before I did, I cut and pasted the solution from the website
onto my routers. Even with the posted solution, I still showed the
network on my serial interface as an external LSA.
-Aaron
-----Original Message-----
From: Vikas Gupta [mailto:vicky_gupta1803@yahoo.com]
Sent: Sunday, October 15, 2000 6:53 PM
To: ccielab@groupstudy.com
Subject: RE: Area 0 interface in OSPF db as Type 5 LSA??
Hi Aaron,
I just wanted to ask that that if you made the serial
interface passive in EIGRP, you won't be advertising
any EIGRP out that serial interface and if the router
in question is a OSPF ASBR, you should see that serial
subnet as *directly connected* in the routing table
even if it is not an OSPF interface and will not be
replaced with redistributed route as the admin
distance of directly connected route is 0 and the
E1/E2 would be 110. This will keep your routes intact
and would still be sent as type 3 (Inter Area)into
non-backbone OSPF areas. This is what my understanding
is and I am not sure if I understood what you were
trying to resolve. It would be great if you could post
the network diagram. That way I would understand it
better.
Also, whenever I do redistribution, I would pretty
much lock down what I want to redistribute using
route-maps/distriute-lists at distribution points
irrespective of any routing protocols.
Vikas
--- "Granofsky, Aaron" <AGranofsky@bns.nec.com> wrote:
> The *real* problem is that the network that is on
> the serial interface is in
> the EIGRP database before I do any redistributing.
> Making the interface
> passive for EIGRP will stop EIGRP updates from going
> out that interface, but
> it doesn't stop EIGRP from knowing about that route.
>
>
> This is even easier to see if you enable rip on a
> router, place any of the
> interfaces into passive mode, and then show ip rip
> database. You'll see all
> of the interfaces in the rip database. If you then
> redistribute rip into
> ospf, the routes will show up as external routes!
>
> My goal was to keep my OSPF internal routes as OSPF
> internal routes after
> redistributing.
>
> The route-map solution kept the route from being fed
> back into OSPF, and
> worked for me.
>
> If anyone knows how to keep a routing process from
> knowing about the routes
> on it's own interfaces, I'd love to hear it.
>
> Regards,
> Aaron
> -----Original Message-----
> From: damien [mailto:damien@clara.co.uk]
> Sent: Sunday, October 15, 2000 2:29 PM
> To: Granofsky, Aaron; ccielab@groupstudy.com
> Cc: Roy Grego
> Subject: Re: Area 0 interface in OSPF db as Type 5
> LSA??
>
>
> I am can't remember its so long since I tried it,
> but I am almost 100% sure
> distribute list out does not work regardless of what
> type of OSPF Router
> they are configured on..........I can try again in
> the Lab.......you can not
> filter LSA's on interfaces............you can filter
> the Redistributed
> Routes before they enter the OSPF process using
> distribute list out, but you
> are filtering a routing process not the LSA.....and
> thats exactly what you
> have done below.............
>
> so in effect what have done below is prevented the
> OSPF Area 0 link from
> entering into the OSPF process so it will not appear
> as a Type 5
> LSA.............
>
> if you look at your original config where you have
> distribute list in, this
> is useless and will have no effect........if you
> configure distribute list
> out EIGRP and ensure that the list number reference
> the route you want to
> deny, you should find that it will
> work.....................
>
> router ospf 1
> summary-address 170.10.26.0 255.255.255.0
> redistribute eigrp 1 subnets
> network 170.10.1.0 0.0.0.255 area 0
> network 170.10.2.0 0.0.0.255 area 0
> default-metric 64
> distribute-list 3 out eigrp
>
> access-list 3 deny 172.16.1.0 0.0.0.255
> access-list 3 permit any
>
> Hope this helps
>
> Damien
>
>
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