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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