Unlike humans, dogs cannot choose to be polite and back off during a disagreement, so do not give them a chance to get a fight started. All dogs and especially your rottie have the potential to get into a violent fight. The difference between your two breeds is that your rottweiler was bred for many generations to win them.
Even if you are successful in maintaining peace between your rottweiler and your other dog, it is more difficult to control aggression between your rottweiler and strange dogs, particularly if you have a male rottie. Although neutering your dogs help prevent aggression, it is never a quaranteed cure.
The most effective solution is to always use a leash when walking your rottweiler and try to avoid other dogs as much as possible. Also, when taking your male rottie out for a walk, do not allow him to urinate on trees or any objects that are sitting along your path. Doing so allow him to claim that object as his territory and is more likely to defend it. In addition, you need to train your dog the basic commands including the "come" , "stay" and "sit" commands. And do not forget to carry some dog treats with you. Every time your dog sees another dog, have him perform these commands and reward him right after the exercise. Never wait for him to act aggressively to the other dog to give your commands. This will only make him think that you are rewarding him for his aggressive actions.
Many dog owners try to stop their dog's aggressive behaviors by speaking to them softly and petting them. This practice is usually not effective because it only gives the dog the impression that what he is doing is an acceptable behavior. In addition, speaking to him in a gentle voice encourages him to be aggressive. On the other hand, you should not scream and yell either. Doing so will give your dog the message that you are including yourself in the fight and are also attacking to other dog. For the same reason, do not run to the other dog or your rottweiler will think that you are starting to attack and your dog will be more than happy to join you.
Keeping in mind about your rottweiler's origin can help you control him and prevent aggressive behavior from ever surfacing. Remember, a confident rottweiler has no motive to start a fight and most of them get along very well with other pets. In fact, rotties are among yhe most responsive of dogs. With proper and positive training, wou will be able to control your dog's aggressive behavior because there is nothing more important to him than obeying his owner's commands.