Advantages of RIPng, OSPFv3, and IS-IS
The biggest advantage of using RIPng is that it is relatively simple to understand and implement, and it has been the de facto routing standard for many years.
RIPng has a number of limitations that can cause problems in large networks, including the following:
- A limit of 15 hops between the source and destination networks
- A large amount of bandwidth taken up by periodic broadcasts of the entire routing table
- Slow convergence
- Routing decisions based on hop count; no concept of link costs or delay
- Flat networks; no concept of areas or boundaries
OSPFv3 and IS-IS offer many advantages over RIPng, including the following:
- No limitation on hop count
- Route updates multicast only when changes occur
- Faster convergence
- Support for load balancing to multiple routers based on the actual cost of the link
- Support for hierarchical topologies where the network is divided into areas
The details of RIPng are explained later in this chapter.