From: Narbik Kocharians (narbikk@gmail.com)
Date: Wed Jun 04 2008 - 02:20:51 ART
The "OSPF Flooding Reduction" and the "demand circuit" work by reducing
unnecessary refreshing and flooding of already known and unchanged
information with a difference:
In OSPF demand circuit, hellos and the flooding of the LSAs are suppressed,
whereas, in flood reduction, only the flooding of the LSAs are suppressed
and NOT the hellos.
On Tue, Jun 3, 2008 at 9:07 PM, Dale Kling <dalek77@gmail.com> wrote:
> Ok I read in the DOCCD that ospf flood-reduction set the DONOTAGE bit, so
> periodic 3600 sec refreshes don't happen.
>
> Now here's a paste from the DOCCD on demand-circuit, " With this feature,
> periodic hellos are suppressed and the periodic refreshes of LSAs are not
> flooded over the demand circuit." My question is don't the ospf routes
> timeout on the other end after 3600 secs or does demand-circuit suspend
> this
> like flood-reduction?
>
> So it looks like OSPF flood reduction still tosses hellos around, while
> demand-circuit does not. Are there more differences then this and what
> would be a good case to differentiate between the two on a question?
>
> regards,
>
> Dale
>
>
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-- Narbik Kocharians CCSI#30832, CCIE# 12410 (R&S, SP, Security) www.Net-Workbooks.com Sr. Technical Instructor
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