Cisco CCNP and CCIE Study Notes

Consider the following two outputs from show ip route on a router that is learning about gateway of last resort information from a neighboring EIGRP router. In both cases the gateway of last resort is 30.30.30.2 but the details are different.

Can you deduce what had to be configured on the neighboring router to get the show ip route output in case#1 and how it was different from what needed to be configured on the neighboring router to get the show ip route output shown in case#2?

Case 1

Gateway of last resort is 30.30.30.2 to network 1.0.0.0

   1.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
D       1.1.1.1/32 [90/435200] via 30.30.30.2, 03:37:24, Ethernet0
D*EX    1.0.0.0/8 [170/307200] via 30.30.30.2, 00:00:16, Ethernet0
   2.0.0.0/32 is subnetted, 1 subnets
D       2.2.2.2 [90/409600] via 30.30.30.2, 03:37:24, Ethernet0
   33.0.0.0/32 is subnetted, 1 subnets
C       33.33.33.33 is directly connected, Loopback1
   3.0.0.0/32 is subnetted, 1 subnets
C       3.3.3.3 is directly connected, Loopback0
   10.0.0.0/24 is subnetted, 1 subnets
D       10.10.10.0 [90/307200] via 30.30.30.2, 03:37:24, Ethernet0
   30.0.0.0/24 is subnetted, 1 subnets
C       30.30.30.0 is directly connected, Ethernet0

Case 2

Gateway of last resort is 30.30.30.2 to network 0.0.0.0

   1.0.0.0/32 is subnetted, 1 subnets
D       1.1.1.1 [90/435200] via 30.30.30.2, 03:40:15, Ethernet0
   2.0.0.0/32 is subnetted, 1 subnets
D       2.2.2.2 [90/409600] via 30.30.30.2, 03:40:15, Ethernet0
   33.0.0.0/32 is subnetted, 1 subnets
C       33.33.33.33 is directly connected, Loopback1
   3.0.0.0/32 is subnetted, 1 subnets
C       3.3.3.3 is directly connected, Loopback0
   10.0.0.0/24 is subnetted, 1 subnets
D       10.10.10.0 [90/307200] via 30.30.30.2, 03:40:15, Ethernet0
   30.0.0.0/24 is subnetted, 1 subnets
C       30.30.30.0 is directly connected, Ethernet0
D*EX 0.0.0.0/0 [170/307200] via 30.30.30.2, 00:00:07, Ethernet0