38-44
Cisco Catalyst Switch Module 3110 and 3012 for IBM BladeCenter Software Configuration Guide
OL-12189-01
Chapter 38 Configuring IP Unicast Routing
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.
If you have routers on your network that are configured for IGRP, and you want to change to EIGRP, you
must designate transition routers configured with both IGRP and EIGRP. In these cases, perform Steps
1 through 3 in the next section and also see the “Configuring Split Horizon” section on page 38-26. You
must use the same autonomous-system number for routes so that they are automatically redistributed.
EIGRP Nonstop Forwarding
The switch stack supports two levels of EIGRP nonstop forwarding:
• EIGRP NSF Awareness, page 38-44
• EIGRP NSF Capability, page 38-45
EIGRP NSF Awareness
The IP-services feature set supports EIGRP NSF awareness for IPv4. 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 in a router failure and the backup RP take-over, or while
you manually reload the primary route processor for a nondisruptive software upgrade.
IP hold-time For low-speed NBMA networks: 180 seconds; all other networks:
15 seconds.
IP split-horizon Enabled.
IP summary address No summary aggregate addresses are predefined.
Metric weights tos: 0; k1 and k3: 1; k2, k4, and k5: 0
Network None specified.
NSF
1
awareness Enabled
2
. Allows Layer 3 switches to continue forwarding packets
from a neighboring NSF-capable router during hardware or software
changes.
NSF capability Disabled.
Note The switch supports EIGRP NSF-capable routing for IPv4.
Offset-list Disabled.
Router EIGRP Disabled.
Set metric No metric set in the route map.
Traffic-share Distributed proportionately to the ratios of the metrics.
Variance 1 (equal-cost load-balancing).
1. NSF = nonstop forwarding
2. EIGRP NSF awareness is enabled for IPv4 on switches running the IP services feature set.
Table 38-8 Default EIGRP Configuration (continued)
Feature Default Setting
