If there are many interfaces /networks on the Routers running EIGRP and you wish to advertise all of those in EIGRP then there is no point of advertising individual routes in eigrp
Use quick way of EIGRP configuration.
R1#sh ip protocols
R1#
R1#sh run | section eigrp
R1#
R2#sh ip protocols
R2#
R2#sh run | section eigrp
R2#
R1(config)#router eigrp 100
R1(config-router)#network 0.0.0.0 0.0.0.0
R1(config-router)#exit
R1(config)#exit
R1#
R2(config)#router eigrp 100
R2(config-router)#network 0.0.0.0 0.0.0.0
R2(config-router)#exit
R2(config)#
*Mar 1 00:23:14.851: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 12.1.1.1 (FastEthernet0/0) is up: new adjacencyexit
R2#
R1#sh ip ei neighbors
IP-EIGRP neighbors for process 100
H Address Interface Hold Uptime SRTT RTO Q Seq
(sec) (ms) Cnt Num
0 12.1.1.2 Fa0/0 14 00:00:27 24 200 0 3
R2#sh ip ei neighbors
IP-EIGRP neighbors for process 100
H Address Interface Hold Uptime SRTT RTO Q Seq
(sec) (ms) Cnt Num
0 12.1.1.1 Fa0/0 10 00:00:40 18 300 0 4
R1#sh ip protocols
Routing Protocol is "eigrp 100"
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 metric weight K1=1, K2=0, K3=1, K4=0, K5=0
EIGRP maximum hopcount 100
EIGRP maximum metric variance 1
Redistributing: eigrp 100
EIGRP NSF-aware route hold timer is 240s
Automatic network summarization is in effect
Automatic address summarization:
100.0.0.0/8 for FastEthernet0/0
Summarizing with metric 128256
12.0.0.0/8 for Loopback100
Summarizing with metric 281600
Maximum path: 4
Routing for Networks:
0.0.0.0
Routing Information Sources:
Gateway Distance Last Update
(this router) 90 00:03:27
12.1.1.2 90 00:01:29
Distance: internal 90 external 170
R1#
R2#sh ip protocols
Routing Protocol is "eigrp 100"
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 metric weight K1=1, K2=0, K3=1, K4=0, K5=0
EIGRP maximum hopcount 100
EIGRP maximum metric variance 1
Redistributing: eigrp 100
EIGRP NSF-aware route hold timer is 240s
Automatic network summarization is in effect
Automatic address summarization:
200.200.200.0/24 for FastEthernet0/0
Summarizing with metric 128256
12.0.0.0/8 for Loopback200
Summarizing with metric 281600
Maximum path: 4
Routing for Networks:
0.0.0.0
Routing Information Sources:
Gateway Distance Last Update
(this router) 90 00:01:59
12.1.1.1 90 00:01:57
Distance: internal 90 external 170
R2#
R1#sh ip ei topology
IP-EIGRP Topology Table for AS(100)/ID(100.100.100.100)
Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,
r - reply Status, s - sia Status
P 100.100.100.100/32, 1 successors, FD is 128256
via Connected, Loopback100
P 12.0.0.0/8, 1 successors, FD is 281600
via Summary (281600/0), Null0
P 12.1.1.0/24, 1 successors, FD is 281600
via Connected, FastEthernet0/0
P 100.0.0.0/8, 1 successors, FD is 128256
via Summary (128256/0), Null0
P 200.200.200.0/24, 1 successors, FD is 409600
via 12.1.1.2 (409600/128256), FastEthernet0/0
R1#
R2#sh ip eigrp topology
IP-EIGRP Topology Table for AS(100)/ID(200.200.200.200)
Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,
r - reply Status, s - sia Status
P 200.200.200.200/32, 1 successors, FD is 128256
via Connected, Loopback200
P 12.0.0.0/8, 1 successors, FD is 281600
via Summary (281600/0), Null0
P 12.1.1.0/24, 1 successors, FD is 281600
via Connected, FastEthernet0/0
P 100.0.0.0/8, 1 successors, FD is 409600
via 12.1.1.1 (409600/128256), FastEthernet0/0
P 200.200.200.0/24, 1 successors, FD is 128256
via Summary (128256/0), Null0
R2#
R1#sh ip route eigrp
D 200.200.200.0/24 [90/409600] via 12.1.1.2, 00:02:14, FastEthernet0/0
100.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
D 100.0.0.0/8 is a summary, 00:04:11, Null0
12.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
D 12.0.0.0/8 is a summary, 00:04:11, Null0
R1#
R1#
R1#ping 200.200.200.200
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 200.200.200.200, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 8/10/16 ms
R1#
R2#sh ip route eigrp
200.200.200.0/24 is variably subnetted, 2 subnets, 2 masks
D 200.200.200.0/24 is a summary, 00:02:57, Null0
D 100.0.0.0/8 [90/409600] via 12.1.1.1, 00:02:55, FastEthernet0/0
12.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
D 12.0.0.0/8 is a summary, 00:02:57, Null0
R2#
R2#ping 100.100.100.100
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 100.100.100.100, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 4/16/32 ms
R2#
Thanks for reading !!!!!
amartechstuff
Awesome tips Bro
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