Fri Oct 14, 2011 6:24 pm
The weight or local preference and prepending have nothing to do with one another. There's no 'match' to go for.
The default local preference is indeed 100. Setting it to 101 would be enough, because highest local preference wins, and 101 is larger than 100. 300 would work. 400 would work. 1000 would work. 99 wouldn't work. Doesn't matter as long as it's more than the default of 100.
I'd just set weight instead of local preference. Weight defaults to 0, so setting any weight will ALWAYS work, even if MT decides tomorrow to default the local pref to 500, so your 101, 300, or 400 don't cut it anymore. You don't gain anything by using local preference over weight, and weight gets compared first. So using weight makes things easier for your router as it has to compare fewer things for every route it has to evaluate.