EIGRP - Routing Protocols and Concepts - page 414

HQ(config-if)# ip summary-address eigrp 1 10.10.0.0 255.255.248.0
HQ(config-if)# interface s0/1/1
HQ(config-if)# ip summary-address eigrp 1 10.10.0.0 255.255.248.0
Record the commands necessary to configure B1 to advertise its LANs in one route.
B1(config)# interface s0/0/0
B1(config-if)# ip summary-address eigrp 1 10.10.8.0 255.255.252.0
Record the commands necessary to configure B2 to advertise its LANs in one route.
B2(config)# interface s0/0/0
B2(config-if)# ip summary-address eigrp 1 10.10.12.0 255.255.254.0
Record the commands necessary to configure B3 to advertise its LANs in one route.
B3(config)# interface s0/0/0
B3(config-if)# ip summary-address eigrp 1 10.10.14.0 255.255.255.0
EIGRP Default Route Exercise
Using a static route to 0.0.0.0/0 as a default route is not routing protocol dependent. The “quad zero”
static default route can be used with any currently supported routing protocols. The static default route
is usually configured on the router that has a connection to a network outside the EIGRP routing
domain, for example, to an Internet service provider (ISP).
Record the command to configure HQ with a default route. Use the exit interface argument.
HQ(config)# ip route 0.0.0.0 0.0.0.0 serial0/0/0
EIGRP requires the use of the redistribute static command to include this static default route with its
EIGRP routing updates. Unfortunately, Packet Tracer v4.1 does not support this command. So, you
will need to configure default routes on B1, B2, and B3 using the exit interface argument. Record the
commands you will use to configure these default routes on the Branch routers.
B1(config)# ip route 0.0.0.0 0.0.0.0 serial0/0/0
B2(config)# ip route 0.0.0.0 0.0.0.0 serial0/0/0
B3(config)# ip route 0.0.0.0 0.0.0.0 serial0/0/0
Fine-Tuning EIGRP Exercise
The last two topics of this chapter review two fundamental ways to fine-tune EIGRP operations. First,
we will discuss EIGRP bandwidth utilization. Next, we will discuss how to change the default Hello
and hold time values.
EIGRP Bandwidth Utilization
By default, EIGRP will use only up to 50 percent of the bandwidth of an interface for EIGRP infor-
mation. This prevents the EIGRP process from overutilizing a link and not allowing enough band-
width for the routing of normal traffic.
The ip bandwidth-percent eigrp command can be used to configure the percentage of bandwidth that
can be used by EIGRP on an interface. Record the full syntax for this command.
Router(config-if)# ip bandwidth-percent eigrp as-number percent