Implementing Basic EIGRP

Setup a lab in GNS as given in diagram. 

Configure all loopbacks on BB Router and also configure all the interface of BB, R2 and R3.

Now -

BB(config)#router eigrp 90

BB(config-router)#network 172.30.0.0 0.0.255.255

BB(config-router)#network 10.1.0.0 0.0.255.255

BB(config-router)#no auto-summary  //("By default RIP and EIGRP supports auto summary.")

R2(config)#router eigrp 90

R2(config-router)#no auto-summary
R2(config-router)#network 10.1.2.2 0.0.0.0
R2(config-router)#network 10.1.24.2 0.0.0.0
R2(config-router)#network 10.1.25.2 0.0.0.0 //("It is mentioned that use specific wild card mask")

R3(config)#router eigrp 90
R3(config-router)#no auto-summary
R3(config-router)#network 10.1.2.1 0.0.0.0
R3(config-router)#network 10.1.34.2 0.0.0.0

Now we need to create static route on BB.

BB(config)#ip route 192.168.1.0 255.255.255.0 null0
and

BB(config-router)#network 192.168.1.0

Now look at tables-
"show ip route"

"show ip eigrp neighbor"

"show ip eigrp topology"

BB(config)#ip default-network 192.168.1.0

No look at routing table of R3 and R3.

D*   192.168.1.0/24 [90/20512000] via 10.1.24.1, 00:00:14, Serial1/0

"* denotes default route pointing to network".
.





Make passive interface where EIGRP doesn't exist.

BB(config-router)#passive-interface default      //"making all interface passive"
BB(config-router)#no passive-interface serial 0/0     //"Making active interface"
BB(config-router)#no passive-interface serial 0/1    //"Making active interface"

"EIGRP" have befit over OSPF we can summarize network at any point but in OSPF we can summarize on border routers only.

BB(config-if)#ip summary-address eigrp 90 172.30.0.0 255.255.248.0   //"on both serial interface"


"After doing this on one interface look at routing table on both router and have a look on next hop on routes"







 
EIGRP is the only routing protocol which supports unequal load balancing.

BB(config-router)#variance 2


Now have a look on tables. And still have any doubt type in comment box.