If you make the bandwidths the same on each interface then you do not need variance. EIGRP should then see them as equal-cost paths, bearing in mind this is quite a high level answer as i do not know your topology.
If you want to keep the original bandwidths then you would need variance although i know some of the NetPro's here think variance is not particularly reliable and i have never used it in vengeance.
Be aware that other things rely on the bandwidth statement on the interface eg QOS so you may affect this as well.
EIGRP doesn't use bandwidth alone to calculate the composite metric. It uses a combination of min bandwidth + total delay to calculate the metric.
The best way to determine the appropriate variance value is to look at the metric of the route via the two paths from the topology table and if the metric of the less desirable path falls within 6 times the value of the best metric then the configuration you have noted above would work.
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.