External Route Metrics; Eigrp And The Unicast Rib; Advanced Eigrp - Cisco Nexus 7000 Series Configuration Manual

Information About EIGRP
S e n d d o c u m e n t c o m m e n t s t o n e x u s 7 k - d o c f e e d b a c k @ c i s c o . c o m .
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By default, EIGRP uses the bandwidth and delay metrics to calculate the distance to the destination. You
can modify the metric weights to include the other metrics in the calculation.

External Route Metrics

External routes are routes that occur between neighbors in different EIGRP autonomous systems. These
routes have the following metrics:
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EIGRP and the Unicast RIB

EIGRP adds all learned routes to the EIGRP topology table and the unicast RIB. When a topology
change occurs, EIGRP uses these routes to search for a feasible successor. EIGRP also listens for
notifications from the unicast RIB for changes in any routes redistributed to EIGRP from another routing
protocol.

Advanced EIGRP

You can use the advanced features of EIGRP to optimize your EIGRP configuration.
This section includes the following topics:
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Cisco Nexus 7000 Series NX-OS Unicast Routing Configuration Guide, Release 4.x
8-4
We recommend that you use the default bandwidth value. This bandwidth parameter is also used
by EIGRP.
MTU—The smallest maximum transmission unit value along the route to the destination.
Hop count—The number of hops or routers that the route passes through to the destination. This
metric is not directly used in the DUAL computation.
Reliability—An indication of the reliability of the links to the destination.
Load—An indication of how much traffic is on the links to the destination.
Next hop—The IP address of the next-hop router.
Router ID—The router ID of the router that redistributed this route into EIGRP.
AS Number—The autonomous system number of the destination.
Protocol ID—A code that represents the routing protocol that learned the destination route.
Tag—An arbitrary tag that can be used for route maps.
Metric—The route metric for this route from the external routing protocol.
Address Families, page 8-5
Authentication, page 8-5
Stub Routers, page 8-6
Route Summarization, page 8-6
Route Redistribution, page 8-6
Load Balancing, page 8-6
Split Horizon, page 8-7
Virtualization Support, page 8-7
Chapter 8 Configuring EIGRP
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