From: dwhitley@xxxxxxxxx
Date: Fri Apr 19 2002 - 13:53:30 GMT-3
I haven't read the RFC in a while but generally preference only comes into
play for equal cost routes. All cost being equal then the preference order
would decide which route to use. From the original post he only wanted to
influence which route r2 was using. Changing the IA to O is a different
issue. The O and IA aren't the relevant issue. The fact that by default
the serial links in question both have the same bandwidth is the relevant
point. If you want to change the IA to O, change the area that the
interface is participating in.
Dean
-----Original Message-----
From: Yan-Hui Liang [mailto:Yan-Hui.Liang@sprint-canada.com]
Sent: Friday, April 19, 2002 12:29 PM
To: Annu Roopa; kris.keen@aon.com.au; Joe Jia
Cc: ccielab@groupstudy.com
Subject: RE: How to change route from O to IA in OSPF?
Q: How can I give preference to OSPF inter-area routes over intra-area
routes?
A. According to RFC, the order of preference for OSPF routes are as follows:
intra-area routes, O
inter-area routes O IA
external routes type 1, O E1
external routes type 2, O E2
-----Original Message-----
From: Annu Roopa [mailto:annu_roopa@yahoo.com]
Sent: Friday, April 19, 2002 11:51 AM
To: kris.keen@aon.com.au; Joe Jia
Cc: ccielab@groupstudy.com
Subject: Re: How to change route from O to IA in OSPF?
Joe,
Was looking at ur diagram.By default OSPf will prefer
the O path over IA path.If u change ur bandwidth on
serial link to reflect the 64K which ur figure says,it
should work.Does that sound correct ?
Let us know.HTH.
Annu
--- kris.keen@aon.com.au wrote:
> Joe,
>
> Do you have a route table handy? Hard to make out
> from your diagram...
>
>
-----------------------------------------------------------------
> Kris Keen - CNE, CCNA, CCNP
> Network Support Specialist - Network Systems
> Aon Risk Services Australia Limited
> (612) 9253 7272
> 0404862970
> E: Kris.Keen@aon.com.au
>
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> "Joe Jia"
>
>
> <ellenjjl@roge To:
> <ccielab@groupstudy.com>
>
> rs.com> cc:
>
>
> Sent by: bcc:
>
>
> nobody@groupst Subject:
> How to change route from O to IA in OSPF?
>
> udy.com
>
>
>
>
>
>
>
>
> 19/04/2002
>
>
> 12:55 PM
>
>
> Please respond
>
>
> to "Joe Jia"
>
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>
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>
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>
>
> Hi,
> how to change the path at R2 to R1's ethernet0 from
> R2's serial0 to its
> ethernet 0?
> I have the case as following: R1,R2,R3 hub-spoke
> topology. R1 has
> ethernet0
> and searial 0 at area 0
> R2 has 64k serial0 and 10M ethernet interfaces, s0
> in area0, ethernet0 in
> area1
> R3 has T1 serial0 and 10M ethernet interfaces, so in
> area 0 , ethernet 0
> with
> R2's e0 in area 1
>
> I have the question, how can change R2's route to
> R1's ethernet0 from R2's
> serial0 to Ethernet0 because this way has a low
> cost?
>
> O , IA, E1, E2?
>
> 128.10.1.0/24
> ______(e0)
> |
> (area0)
> R1
> |
> (s0) 172.16.1.5/24
> (area0) / \ (area0)
> 64k / \ T1
> / \
> (s0) (s0)
> 172.16.1.6/24 | | 172.16.1.1/24
> R2 R3
> | (e0) | (e0)
> (area1)|________| (area1)
>
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