Information Technology Reference
In-Depth Information
Example 7-27 shows the configuration of Router9. EIGRP is configured with the autonomous
system number 100. EIGRP hellos are sent on all interfaces configured with an IP address
within 172.16.0.0. You use the variable subnet masks; the subnet mask on Ethernet 0 is /24
and on Serial 0 is /30.
Example 7-27
Configuration of Router9
hostname Router9
!
interface Ethernet0
ip address 172.16.1.1 255.255.255.0
!
interface Serial0
ip address 172.16.4.1 255.255.255.252
!
router eigrp 100
network 172.16.0.0
255.255.255.0
255.255.255.252
Example 7-28 shows the configuration of Router10. EIGRP is configured with the autonomous
system number 100. EIGRP hellos are sent on all interfaces configured with an IP address
within 172.16.0.0. You use the variable subnet masks; the subnet mask on Ethernet 0 is /24
and on Serial 0 is /30.
Example 7-28
Configuration of Router10
hostname Router10
!
interface Ethernet0
ip address 172.16.2.1 255.255.255.0
!
interface Serial0
ip address 172.16.4.2 255.255.255.252
!
router eigrp 100
network 172.16.0.0
255.255.255.0
255.255.255.252
After the routers are configured, you verify the EIGRP neighbors by using the
show ip eigrp
neighbor
command. Example 7-30 shows the output for Router8. From the output, you can
determine that the IP address of the neighbor (Router9) is 172.16.1.1, the interface to reach the
neighbor is Ethernet 0, the holdtime counter is at 11 seconds (starts at 15 and counts down), and
the neighbor uptime is 19 minutes and 42 seconds. Smooth route-trip time (SRTT) is calculated
in milliseconds; 11 milliseconds in this example. SRTT is the average time that it takes from
when a packet is sent to receive an acknowledgment from a neighbor. Retransmission Timeout
(RTO) is the time that the router waits for the acknowledgment on a unicast packet when a
multicast fails; 200 milliseconds in this example. The Q count is the number of queued packets,
0, as shown in Example 7-29.
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