What’s new and exciting with EIGRP (Enhanced Interior Gateway Routing Protocol)? Actually, lots… First a bit a background on EIGRP.
EIGRP is an advanced distance vector routing protocol used extensively by enterprise customers. It is very popular because it is simple to deploy and support. Some major attributes are:
- EIGRP does not mandate many network design requirements and is therefore perceived as “forgiving” and “flexible”. For example, EIGRP does not require support for multiple routing sub-domains or Areas.
- While route summarization is a recommended best practice to minimize route table size, it is optional with EIGRP.
- EIGRP can scale to support thousands of routers in a Hub and Spoke configuration. The Hub and Spoke design is especially popular in WAN networks.
While EIGRP has a large customer following, some customers have hesitated because of concerns of EIGRP being “proprietary”, which would prevent them from multi-vendor network support. In some cases this has caused customers to design their networks to limit usage of EIGRP, even though they would like to deploy it ubiquitously. One result has been non-optimal network design and traffic flow, resulting from multiple IGP (Interior Gateway Protocol) redistribution points.
That brings me back to what is new and exciting with EIGRP. Read More »