From: Toh Soon, Lim (tohsoon28@gmail.com)
Date: Thu Jul 26 2007 - 05:37:32 ART
Hi Prasad,
You are right. Another reason I can think of is in BGP, some people prefer
to redistribute the connected route between EBGP peers into their IGP so
that the NEXT_HOP is accessible by the IBGP routers when "next-hop-self" is
not used. In this case, I prefer to cover that interface in IGP but
configure it as passive interface.
Other than this, I can't think of any other reasons why we need to
redistribute connected routes. Typically we will cover each interface per
routing protocol and then perform the necessary redistribution.
If I were asked to redistribute connected, I usually will reference a
route-map to permit only those specific connected routes to be redistributed
into the target protocol.
Any opinion is welcome.
Thank you.
B.Rgds,
Lim TS
On 7/26/07, Prasad Shemrudkar (pshemrud) <pshemrud@cisco.com> wrote:
>
> Hi Ben,
>
> I think this will be typically seen in a scenario where the task asks
> you to advertise a directly connected interface into RIP without using
> network x.x.x.x command under router rip.
>
> HTH,
> Prasad.
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Ben
> Sent: Thursday, July 26, 2007 11:33 AM
> To: Cisco certification
> Subject: RIP redistribution
>
> Hi
> As I understand IGP redistribution, it redistributes all the routes from
> the
> source IGP, as well as connected routes on which the source IGP has been
> enabled. Most examples I have seen of redistribution between RIP and
> other
> IGPs also include "redistribute connected" into RIP, even when there is
> no
> route-map filtering the redistribution of the other IGP into RIP.
>
> For example, you will typically see the following:
>
> router ospf 1
> red rip sub
> router rip
> red ospf 1 metric 1
> red conn metric 1
>
> Why do we need to explicitly redistribute connected routes into RIP,
> when
> this action is already implicit in the IGP (OSPF) redistribution into
> RIP?
>
> TIA
> Ben
>
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