nx.os.and.cisco.nexus.switching.2nd.edition.1587143046

ip router eigrp DataCenter1
ip passive-interface eigrp DataCenter1
EIGRP Summarization
EIGRP has the capability to summarize routes in a flexible manner per interface. This
enables network designers to summarize their networks for maximum efficiency without the
constraints of specific borders or other topological designations. When a network is
summarized, a single entry with a shorter prefix (commonly called a supernet) is created
and added to the routing table as a representation of the longer prefix subnets. The examples
that follow show how to create a summary for 192.168.128.0 /20 that is advertised out
interface e1/18.
Note
With this summary, the following networks are represented:
192.168.128.0/24 through 192.168.143.0/24.
Example 3-13 shows EIGRP summarization between the Congo and Libya networks, as
shown in Figure 3-1.
Figure 3-1. EIGRP Summarization
Example 3-13. Summarizing Networks in EIGRP Using Numeric Tags
Click here to view code image
Congo# config t
Congo(config)# interface e1/18
Congo(config-if)# ip summary-address eigrp 200
192.168.128.0/20
Congo(config-if)# end
Example 3-14 shows how to summarize a network when EIGRP uses an alphanumeric tag.