EIGRP doesn't consider default network as gateway of last resort

[mh.gorjizadeh]

Hello Guys

Well i have kind of problem with default route in EIGRP.

I setup int loopback  on core router with calassfull ip address  (192.168.1.1/24 ) and do every then in global config by using

ip default-network 192.168.1.0  

set it up as default network .

Finally other routers like branch router see that as default network and you can see in show ip route 

Gateway of last resort is not
set

.

.

.

Lines omitted for brevity
D* 192.168.1.0/24 [90/2297856] via 10.1.1.1, 00:05:10, Fastethernet 0/0

but weird thing is that the ((Gateway of last resort is not set)) !!!

what can cause such problem ?

I must admit i use GNS3 and Packet tracer , and it works in packet tracer properly but not in GNS3 .

Thank for your help 

[Richard Bradfield]

Do you have a route to 0.0.0.0 0.0.0.0.0 anywhere? you must have one then redistribute into EIGRP

HTH

[mh.gorjizadeh]

I used other method which consider some route  as default network ( it can be even a route to loop-back interface) .

Well i just changed the router (in GNS3) and it already works. 

Thank you for your help