Nonstop Forwarding Awareness; Configuring Basic Eigrp Parameters - Cisco 3845 - Security Bundle Router Software Manual

Configuring EIGRP
To create an EIGRP routing process, you must enable EIGRP and associate networks. EIGRP sends
updates to the interfaces in the specified networks. If you do not specify an interface network, it is not
advertised in any EIGRP update.

Nonstop Forwarding Awareness

The EIGRP NSF Awareness feature is supported for IPv4 in the metro IP access 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/docs/ios/12_2t/12_2t15/feature/guide/ft_ensf.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
Step 1
configure terminal
Step 2
router eigrp autonomous-system
Step 3 network network-number
Step 4
eigrp log-neighbor-changes
Step 5 metric weights tos k1 k2 k3 k4 k5
Step 6
offset list [access-list number | name] {in | out}
offset [type number]
Step 7
no auto-summary
Step 8
ip summary-address eigrp
autonomous-system-number address mask
Step 9 end
Cisco ME 3800X and 3600X Switch Software Configuration Guide
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Purpose
Enter global configuration mode.
Enable an EIGRP routing process, and enter router configuration
mode. The AS number identifies the routes to other EIGRP routers
and is used to tag routing information.
Associate networks with an EIGRP routing process. EIGRP sends
updates to the interfaces in the specified networks.
(Optional) Enable logging of EIGRP neighbor changes to monitor
routing system stability.
(Optional) Adjust the EIGRP metric. Although the defaults have
been carefully set to provide excellent operation in most networks,
you can adjust them.
Setting metrics is complex and is not recommended
Caution
without guidance from an experienced network
designer.
(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.
(Optional) Disable automatic summarization of subnet routes into
network-level routes.
(Optional) Configure a summary aggregate.
Return to privileged EXEC mode.
Chapter 29 Configuring IP Unicast Routing
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