ITPro,
Apologies for the length of this one, but it is driving me a little crazy. Practice question I came across reads as follows:
Which command was used to create the following configuration?
Router# show ip protocol
Routing Protocol is "eigrp 1"
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Redistributing: eigrp 1
Automatic network summarization is in effect
Routing for Networks:
192.168.1.80/28
192.168.1.128/28
Routing Information Sources:
Gateway Distance Last Update
192.168.1.85 90 0:04:01
Distance: internal 90 external 170
A. Router(config-router)# network 192.168.1.0 0.0.0.15
B. Router(config-router)# network 192.168.1.0 255.255.255.0
C. Router(config-router)# network 192.168.1.80
Router(config-router)# network 192.168.1.128
D. Router(config-router)# network 192.168.1.0
They are saying the answer is "D".. I am really confused though... If I were to be faced with having to advertise the two networks that are displayed in the questions output (192.168.1.80/28 and 192.168.1.128/28), I would simply issue these commands within the EIGRP AS number prompt:
network 192.168.1.80 0.0.0.15
network 192.168.1.128 0.0.0.15
So I was really suprised to find that none of the answers really fit, and more so that the answer was "D"... So I decided to try this on two different routers running IOS 15+. A 2911 and an 1841 with the same result. Tested with and without "auto-summary". Take a look at my output below.. Notice how the "show ip protocols" networks is just "192.168.0.1"? Did I find a bad question or is there something I am missing?
R3(config-router)#do show run | section eigrp
router eigrp 1
network 192.168.1.0
Routing Protocol is "eigrp 1"
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Default networks flagged in outgoing updates
Default networks accepted from incoming updates
EIGRP-IPv4 Protocol for AS(1)
Metric weight K1=1, K2=0, K3=1, K4=0, K5=0
NSF-aware route hold timer is 240
Router-ID: 192.168.4.1
Topology : 0 (base)
Active Timer: 3 min
Distance: internal 90 external 170
Maximum path: 4
Maximum hopcount 100
Maximum metric variance 1
Automatic Summarization: enabled
Maximum path: 4
Routing for Networks:
192.168.1.0
Routing Information Sources:
Gateway Distance Last Update
Distance: internal 90 external 170
R3(config-router)#do show run int gi0/0.1
Building configuration...
Current configuration : 103 bytes
!
interface GigabitEthernet0/0.1
encapsulation dot1Q 88
ip address 192.168.1.81 255.255.255.240
end
R3(config-router)#do show run int gi0/0.2
Building configuration...
Current configuration : 104 bytes
!
interface GigabitEthernet0/0.2
encapsulation dot1Q 89
ip address 192.168.1.129 255.255.255.240
end