From: Pavel Bykov (slidersv@gmail.com)
Date: Tue Nov 18 2008 - 21:07:25 ARST
Just FYI, in Scott's excerpt it is mentioned that "By default, in normal
areas OSPF routers don't generate default routes into
their routing domains, even if one exists."
This refers to RIP and EIGRP protocols which do redistribute default route
automatically, if "ip default-network" command is present.
On Tue, Nov 18, 2008 at 11:06 PM, Scott M Vermillion <
scott_ccie_list@it-ag.com> wrote:
> From:
>
>
> http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080094a74
> .shtml<http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080094a74.shtml>
>
> "Normal Areas
>
> By default, in normal areas OSPF routers don't generate default routes into
> their routing domains, even if one exists. To have an OSPF router generate
> a
> default route, use the default-information originate [always] [metric
> metric-value] [metric-type type-value] [route-map map-name] command in the
> OSPF router configuration mode. This generates an external Type-2 link with
> link-state ID 0.0.0.0 and network mask 0.0.0.0, which makes the router an
> ASBR."
>
> Cheers,
>
> Scott
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Sachin D
> Sent: Tuesday, November 18, 2008 9:35 AM
> To: Cisco certification
> Subject: Redistributing Default route
>
> Hi
>
> Need help on the below redistribution problem
>
>
>
> _ _ _ _ _ _ _ _ _ _ _ _ _
> | | |
> | RIP | OSPF |
> | | |
> R1<------------>R|2<----------->R3
> | | |
> | | |
> | _ _ _ _ _ _ _ | _ _ _ _ _ _ _ |
>
>
>
> In the above topology
> R2 is connected to R1 and R3.
> R1 and R2 are running RIP,
> R2 and R3 are running OSPF
>
> R1 is sending only default route to R2 via RIP
>
> Hence R2 has only 1 route for RIP subnets
> R* 0.0.0.0/0 [120/1] via x.x.x.x, 00:00:03,
>
> But when I am redistributing RIP into OSPF this default route is not
> getting
> redistributed into OSPF i.e R3 is not learning this default route.
>
> On the vice versa if default is generated in OSPF i.e by R3 and
> redistributed in RIP on R2 default route is passed to R1 i.e R1 learns the
> default route.
>
> Is there any concept I am missing here ?
>
> Why the default route is not getting redistributed into OSPF from RIP ?
>
>
> Regards
>
>
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>
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-- Pavel Bykov ------------------------------------------------- Stop the braindumps! http://www.stopbraindumps.com/Blogs and organic groups at http://www.ccie.net
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