rb configurations:
 

show running-config
Building configuration...

Current configuration:
!
version 11.2
no service password-encryption
no service udp-small-servers
no service tcp-small-servers
!
hostname routerB
!
!
partition flash 2 8 8
!
!
interface Ethernet0
 no ip address
 shutdown
!
interface Serial0
 ip address 202.202.202.2 255.255.255.0
!
interface Serial1
 ip address 201.201.201.2 
255.255.255.0
clockrate 56000
router igrp 1
 network 201.201.201.0
 network 202.202.202.0
!
no ip classless
!
!
line con 0
line aux 0
line vty 0 4
 login
!
end

  

---------------------------------------------

ra configurations:


show running-config
Building configuration...

Current configuration : 506 bytes
!
version 12.1
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname RouterA
!
!
!
!
!
!
ip subnet-zero
!
!
!
!
interface Ethernet0
 no ip address
 shutdown
 --More-- 
interface Serial0
 ip address 202.202.202.1 255.255.255.0
 clockrate 56000
!
interface Serial1
 ip address 200.200.200.1 255.255.255.0
 clockrate 56000
!
router igrp 1
 network 200.200.200.0
 network 202.202.202.0
!
ip classless
ip http server
!
!
line con 0
line aux 0
line vty 0 4
 login
!
end
 --More--       
---------------------------------------

rd configurations:


show running-config
Building configuration...

Current configuration:
!
version 11.1
service udp-small-servers
service tcp-small-servers
!
hostname routerD
!
!
!
interface Ethernet0
 ip address 199.199.199.4 255.255.255.0
!
interface Serial0
 ip address 200.200.200.4 255.255.255.0
!
interface Serial1
 ip address 201.201.201.4 255.255.255.0
!
router eigrp 1
 network 200.200.200.0
 network 201.201.201.0 
network 199.199.199.0
!
no ip classless
logging buffered
!
line con 0
line aux 0
line vty 0 4
 login
!
end

     
----------------------------------

Routing tables:

routing table at rd( running eigrp 1)

routerD#     show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
       i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, * - candidate default
       U - per-user static route

Gateway of last resort is not set

C    199.199.199.0/24 is directly connected, Ethernet0
C    200.200.200.0/24 is directly connected, Serial0
C    201.201.201.0/24 is directly connected, Serial1
------------------------

routing table at ra

RouterA#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
       i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
       * - candidate default, U - per-user static route, o - ODR
       P - periodic downloaded static route

Gateway of last resort is not set

C    200.200.200.0/24 is directly connected, Serial1
I    201.201.201.0/24 [100/10476] via 202.202.202.2, 00:00:12, Serial0
C    202.202.202.0/24 is directly connected, Serial0
------------------------------

routing table at rb:

routerB#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
       i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, * - candidate default
       U - per-user static route, o - ODR

Gateway of last resort is not set

I    200.200.200.0/24 [100/10476] via 202.202.202.1, 00:01:07, Serial0
C    201.201.201.0/24 is directly connected, Serial1
C    202.202.202.0/24 is directly connected, Serial0
--------------------------------


I don't see any auto redistribution between eigrp 1( on rd) and igrp 1(on ra,rb).

Any body knows what is going on here?


thanks a lot!