Hey kids! On most Cisco routers, “dsu remote accept” is enabled by default! This means that if you’re paying for a fractional DS3 from your upstream service provider, and you have the right type of router on your side, you can issue the command “dsu remote fullrate” to crank that fractional DS3 up to a full 45MB! Even better, your upstream provider will likely not notice, giving you hundreds of thousands of dollars of bandwidth for free! What’s more, if your provider notices, Cisco will consistently tell them that “that command is probably not enabled by default,” but Cisco isn’t sure, because they’ve “never tested it in a lab!”
Oh, and if you’re an upstream provider, this means you’re going to have to add the line “no dsu remote accept” to all of your fractional DS3 configs! Let’s all do the Happy We Love Cisco Dance! YAY!