What are some of the dangers associated with mixing bridging and routing?
In a general sense, mixing the two technologies can lead to scalability problems. Specifically, it merges multiple Spanning Trees into a single tree. This can create Spanning Tree instability and defeat load balancing. It can lead to excessive broadcast radiation. It can make troubleshooting difficult. In general, it is advisable to create hard Layer 3 barriers in the network to avoid these issues.