Re: ISIS incremental SPF

No. No... I WANT my routers to do more work. ;)

I'd agree. As long as the devices support it (possibly the catch), I'd
turn it on!

*Scott Morris*, CCIE/x4/ (R&S/ISP-Dial/Security/Service Provider) #4713,

JNCIE-M #153, JNCIS-ER, CISSP, et al.

JNCI-M, JNCI-ER

evil_at_ine.com

Internetwork Expert, Inc.

http://www.InternetworkExpert.com

Toll Free: 877-224-8987

Outside US: 775-826-4344

Knowledge is power.

Power corrupts.

Study hard and be Eeeeviiiil......

Jared Scrivener wrote:
> ISPF only calculates those elements of the SPF tree that have changed or are
> affected by a change. This saves time and CPU use on the router it is
> enabled on as it doesn't have to recalculate the full SPF algorithm for
> stable network sections.
>
> I don't know of any reason not to enable it everywhere in theory or in
> practice, so if anyone has one I'd be glad to learn it.
>
>
> On 6/9/09 4:40 AM, "Rin" <rintrum_at_gmail.com> wrote:
>
>
>> Hi all,
>>
>>
>>
>> What are the differences between configuring & not configuring "incremental
>> SPF" in ISIS? From the documentation, iSPF prevents the entire SPT being
>> recomputed and it only computes the steps needed to apply the changes in the
>> network topology diagram. So is it ok if I enable iSPF throughout the whole
>> ISIS network to increase the convergence time? Is there any disadvantages?
>> Thanks
>>
>> Rin.
>>
>>
>> Blogs and organic groups at http://www.ccie.net
>>
>> _______________________________________________________________________
>> Subscription information may be found at:
>> http://www.groupstudy.com/list/CCIELab.html
>>
>>
>>
>>
>>
>>
>>
>>
>
> Cheers,
>
> Jared Scrivener CCIE3 #16983 (R&S, Security, SP), CISSP
> Sr. Technical Instructor - IPexpert, Inc.
> URL: http://www.IPexpert.com
> Telephone: +1.810.326.1444
> Fax: +1.810.454.0130
> Mailto: jscrivener_at_ipexpert.com
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html

Blogs and organic groups at http://www.ccie.net
Received on Tue Jun 09 2009 - 16:45:00 ART