Re: Fw: OSPF Type 4 LSA --only when there is O E1 routes ?

Hi,

No its not. Type 4 LSAs are generated regardless of whether it is E1 or E2
route.

The E1 or E2 route only determines whether external metric is used or both
external and internal metrics are used.

Lejoe

On Sat, Apr 4, 2009 at 4:35 PM, Thameem Maranveetil Parambath <
tparamba_at_thecontactcentre.ae> wrote:

> Is this true?
>
>
>
> Type 4 LSA?s are generated by ABRs that have an ASBR in
> an area it
> touches. The Type 4 LSA is created by the ABR to describe the
> ASBR and
> its costs to reach it. Type 4 LSA?s are used when an ASBR is
> redistributing type-1 external routes (E1), which helps routers in other
> areas calculate the exact metric to reach the external route. If the ASBR
> is only redistributing type-2 external routes (E2), no Type 4 LSA will be
> generated by an ABR.
>
> This is from a blog.
>
> Warm Regards,
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Received on Sat Apr 04 2009 - 17:29:01 ART