Re: [Roll] "Link quality" as a metric for MRHIF

Omprakash Gnawali <gnawali@cs.uh.edu> Sat, 02 June 2012 08:52 UTC

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From: Omprakash Gnawali <gnawali@cs.uh.edu>
Date: Sat, 2 Jun 2012 03:51:47 -0500
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To: Ralph Droms <rdroms@cisco.com>
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Cc: draft-ietf-roll-minrank-hysteresis-of@tools.ietf.org, roll@ietf.org
Subject: Re: [Roll] "Link quality" as a metric for MRHIF
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On Fri, Jun 1, 2012 at 3:14 PM, Ralph Droms <rdroms@cisco.com> wrote:
> How is the "link quality" metric used as a selected metric in MRHOF?  As I read RFC 6551, the link quality container carries a list of individual link qualities.  To use the link quality metric in MRHOF, does the computing node add up all the link qualities from the container option to compute the parent path cost?  What about link quality sub-objects with link quality value "0"?

Yes, adding up all the link quality level to compute the path cost.
Adding up all the link quality level, including a 0, will result in
some value which is converted to rank but it is not clear if MRHOF
would be the best objective function to use if you want to use link
quality level metric.

- om_p