[Ndn-interest] what is the cost of face ?

Junxiao Shi shijunxiao at email.arizona.edu
Mon Nov 20 06:19:49 PST 2017

Hi Jinyang

In NFD, NextHop::m_cost represents the administrative cost of a FIB
nexthop. It directly comes from the administrative cost of a RIB route. It
is used in best route strategy.

As posted in https://redmine.named-data.net/issues/2010 , there isn't a
guideline on how to set RIB cost. When NDN testbed was using link state
routing, operations personnel was using IP ping round-trip time as the
basis of setting RIB cost.

Yours, Junxiao

On Sun, Nov 19, 2017 at 7:05 AM, jinyangl at mail.ustc.edu.cn <
jinyangl at mail.ustc.edu.cn> wrote:

> hello ,i find a member variable m_cost of nfd::fib::NextHop,
> but what is it? whether it is the cost when we use the best-route-strategy
> ?
> And how should we calculate is ? do we need/use it in another place ?
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