[j-nsp] aggregated-ethernet and metric adjustment, if one link fails

[Alex D.]

Hi list,

is it possible to automatically raise IS-IS metric, if one or more 
link(s) of an aggregated-ethernet fails ?

Exp.:
We have an aggregated-ethernet interface with 2x 1Gbps. Our IS-IS metric 
for this interface is 50. Metric for a single Gigabit interface is 100.

It would be nice, if the metric could be automatically raised to 100 
when one member link fails.
Does anyone know a way to accomplish this goal ?

Regards,
Alex