Thanks Acee, and also I just want to correct my
question, it is type-7 default LSA that it didnt
get flushed and not default-summary-LSA.

   And also I have one more question wrt same topic,
On setting I7 down, R4 has default route through Area2(I8)
and R5 has a default route through network on I9
and R3 has a default route through network on I6.

   But R3 also has a network specific type-5 route
to external rip network, so it takes precedence over the
default-route.

   Isnt it routing loop, R3 having a default route
through network on the interface I6 and R5 having a default
route through network on the interface I9.

Acee Lindem wrote:
>
> Mani,
>
> You are correct, R4 should purge it's default summary
> advertisement since it is no longer an ABR.
>
> Thanks,
> Acee
>
> Mani Devarajan wrote:
>
> > Hi all,
> >
> >
> > ASBR
> > ----- ------ ----- -------
> > | | | | | | | |
> > | R1 | | R2 | | R3 | | R5 |
> > | | | | | | | |
> > ----- ------ ----- -------
> > | |I1 I2| | |I4 I5| |I6 I9| |
> > RIP--- ----- | ------ ----- |
> > AREA1 | AREA 0 AREA2 |
> > |I3 |I10
> > | ----- |
> > | I7| |I8 |
> > -----| R4 |-------
> > AREA0 | | AREA2
> > -----
> >
> > * AREA2 is configured for Stub
> >
> > In the above scenario, both ABR's(R4,R3) of Area2
> > generates a default route. If R5 considers the default
> > route through R4 to reach the external network and
> > if I bring down the I7 interface on R4, I observed
> > that R4 flushes the summary LSA's it generated in
> > Area2 except for the default-summary-LSA. Is it
> > correct behaviour.
> >
> > My doubt is, as R4 is not an ABR anymore (it is
> > just an internal router in Area2 after setting I7
> > down) is it correct to have the default-summary-LSA
> > genereated by R4 in Area2 database instead of flushing
> > it.
> >
> > Thanks in advance,
> > -Mani
> >
> >
>
> --
> Acee

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