RE: Default information originate..... OSPF

From: cebuano (cebu2ccie@cox.net)
Date: Sat Dec 21 2002 - 02:28:37 GMT-3


Hi there.
In the third scenario, when you redistribute routes into an OSPF domain,
the router automatically becomes an ASBR. However, an ASBR DOES NOT, by
default, generate a "default route" into the OSPF domain. You need to
add this...

Router ospf 1
   Redist static subnets
   Default-info orig always

Now you will see Type-5 LSAs and the OSPF routers in the domain will
have an E2 0.0.0.0 in the routing table.

HTH,
Elmer

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
ccieingroup@hotmail.com
Sent: Friday, December 20, 2002 4:25 PM
To: JuniJinn@aol.com; ccielab@groupstudy.com
Subject: Re: Default information originate..... OSPF

Hi all guys,

As I know, the scenario 1 and 2 are absolutely right. But to the three,
I
think there isn't such a solution for OSPF to originate a default route
to
OSPF domain. I just tried it in my lab once again. No any type 5 in OSPF
database generate by my commands as below:

ip route 0.0.0.0 0.0.0.0 10.0.2.1
router ospf 1
redistribute static subnets

I also tried using Rip(generate 0.0.0.0) + router ospf 1-> redistribute
rip
subnets. The result is the same.

Do your practices in your lab succeed to the third scenario?
Thanks for your clearance in advance and Merry Christmas to all of your
kind
members!
Richard Hanks
  ----- Original Message -----
  Wrom: RHDMNNSKVFVWRKJVZCM
  To: ccielab@groupstudy.com
  Sent: Thursday, December 19, 2002 3:51 PM
  Subject: Default information originate..... OSPF

  Senerio 1 ---> On an ASBR you use the "Default-Information
originate"
  command and have a static default defined. My understanding of this
command
  is that OSPF will pick the default up and propagate it.
  Senerio 2 -----> On an ASBR you use the "default-information
originate
  always" command and OSPF will inject a default route into its domain
.
  Senerio 3----> you Create a static default and redistribute the static
into
  OSPF.
  Question...in senerio 2 what interface does OSPF choose as its next
hop
  interface on the router that you put the command on ie the ASBR
  Question......Are all these senerios basicaly doing the same thing and
if
  there is a difference..what is it?
  Thankyou for any input you might provide.
  Junaid
  .
.
.



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