Filter
Top Products
36-36
Catalyst 3560 Switch Software Configuration Guide
OL-8553-06
Chapter 36 Configuring IP Unicast Routing
Configuring EIGRP
Note If you have routers on your network that are configured for IGRP, and you want to change to EIGRP, you
must designate transition routers that have both IGRP and EIGRP configured. In these cases, perform
Steps 1 through 3 in the next section and also see the
“Configuring Split Horizon” section on page 36-23.
You must use the same AS number for routes to be automatically redistributed.
EIGRP NSF Awareness
The EIGRP NSF Awareness feature is supported for IPv4 in the IP services image. When the neighboring
router is NSF-capable, the Layer 3 switch continues to forward packets from the neighboring router
during the interval between the primary Route Processor (RP) in a router failing and the backup RP
taking over, or while the primary RP is manually reloaded for a nondisruptive software upgrade.
This feature cannot be disabled. For more information on this feature, see the EIGRP Nonstop
Forwarding (NSF) Awareness Feature Guide at this URL:
http://www.cisco.com/en/US/products/sw/iosswrel/ps1839/products_feature_guide09186a0080160010
.html
Configuring Basic EIGRP Parameters
Beginning in privileged EXEC mode, follow these steps to configure EIGRP. Configuring the routing
process is required; other steps are optional:
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
router eigrp autonomous-system number Enable an EIGRP routing process, and enter router configuration
mode. The AS number identifies the routes to other EIGRP routers
and tags routing information.
Step 3
network network-number Associate networks with an EIGRP routing process. EIGRP sends
updates to the interfaces in the specified networks.
Step 4
eigrp log-neighbor-changes (Optional) Enable logging of EIGRP neighbor changes to monitor
routing system stability.
Step 5
metric weights tos k1 k2 k3 k4 k5 (Optional) Adjust the EIGRP metric. Although the defaults have
been carefully set to provide excellent operation in most networks,
you can adjust them.
Caution Setting metrics is complex and is not recommended
without guidance from an experienced network
designer.
Step 6
offset list [access-list number | name] {in | out}
offset [type number]
(Optional) Apply an offset list to routing metrics to increase
incoming and outgoing metrics to routes learned through EIGRP.
You can limit the offset list with an access list or an interface.
Step 7
no auto-summary (Optional) Disable automatic summarization of subnet routes into
network-level routes.
Step 8
ip summary-address eigrp
autonomous-system-number address mask
(Optional) Configure a summary aggregate.