a very good question-
here is specification between two

i am going to explain brefly 
  
please read it carefully.


Route redistribution is the process of taking routes 
learned via one routing protocol and injecting those routes
into another routing domain. (Static and connected routes
can also be redistributed.) When a router running OSPF takes
routes learned by another routing protocol and makes them
available to the other OSPF-enabled routers it's
communicating with, that router becomes an Autonomous System
Border Router (ASBR).

Let's work with an example where R1 is running both OSPF and
RIP. R4 is in the same OSPF domain as R1, and we want R4 to
learn the routes that R1 is learning via RIP. This means we
have to perform route redistribution on the ASBR. The routes
that are being redistributed from RIP into OSPF will appear
as E2 routes on R4:

what is asbr-Autonomous System Border Router
(ASBR).Autonomous System Boundary Router (ASBR) is a router
located between an OSPF autonomous system and a non-OSPF
network (such as RIP). ASBRs run both OSPF and another
routing protocol, such as RIP. ASBRs must reside on a
non-stub OSPF area.

and this type of route is called ospf e2 route

answer 1 continue

let there are three router 

r1---------r2------r3

r1------area 0  protocol ospf
 r2------area1    protocol ospf9this is abr router)
r3---------area2   protocol rip(this is asbr router)

now we have to make redisrtubution  on asbr router.

so this is called e type

now 

e1 is so simlple you make a digram with therer router and
run each by single ospf enabled protocol that is called e1

let see the comand

router A
interface Loopback0
 ip address 1.1.1.1 255.255.255.255
!
interface Serial0/1
 ip address 10.1.1.1 255.255.255.252
 clockrate 64000
!
router ospf 1
 network 10.1.1.0 0.0.0.3 area 0
 
outer B
interface Loopback0
 ip address 2.2.2.2 255.255.255.255
!
interface Serial0
 ip address 10.1.1.2 255.255.255.252
!
interface Serial 1
 ip address 10.1.1.5 255.255.255.252
!
router eigrp 1
 network 10.0.0.0
!
router ospf 1
 network 10.1.1.0 0.0.0.3 area 0

outer C
interface Loopback0
 ip address 3.3.3.3 255.255.255.255
!
interface Loopback1
 ip address 5.5.5.5 255.0.0.0
!
interface Loopback2
 ip address 6.6.6.6 255.240.0.0
!
interface Loopback3
 ip address 145.5.5.5 255.255.0.0
!
interface Loopback4
 ip address 146.6.6.6 255.255.240.0
!
interface Loopback5
 ip address 205.5.5.5 255.255.255.0
!
interface Loopback6
 ip address 206.6.6.6 255.255.255.240
!
interface Serial0
 ip address 10.1.1.6 255.255.255.252
!
router eigrp 1
 network 5.0.0.0
 network 6.0.0.0
 network 10.0.0.0
 network 145.5.0.0
 network 146.6.0.0
 network 205.5.5.0
 network 206.6.6.0
 no auto-summary


Verify that Routers A and B have established an OSPF
neighbor relationship.

rtrA#show ip ospf neighbor
Neighbor ID   Pri  State      Dead Time  Address     Interface
2.2.2.2      1  FULL/ -    00:00:36  10.1.1.2    Serial0/1

verify that Routers B and C have formed an EIGRP neighbor
relationship.
trB#show ip eigrp neighbors
IP-EIGRP neighbors for process 1
H  Address         Interface  Hold Uptime  SRTT  RTO Q Seq
                    (sec)     (ms)    Cnt Num
0  10.1.1.6        Se1      11 00:25:42 308 2280 0 4

Verify that Router B is receiving the six EIGRP routes from
Router C

rtrB#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
   2.0.0.0/32 is subnetted, 1 subnets
C    2.2.2.2 is directly connected, Loopback0
D  205.5.5.0/24 [90/40640000] via 10.1.1.6, 00:26:25, Serial1
   206.6.6.0/28 is subnetted, 1 subnets
D    206.6.6.0 [90/40640000] via 10.1.1.6, 00:26:25, Serial1
D  5.0.0.0/8 [90/40640000] via 10.1.1.6, 00:26:25, Serial1
   6.0.0.0/12 is subnetted, 1 subnets
D    6.0.0.0 [90/40640000] via 10.1.1.6, 00:26:25, Serial1
D  145.5.0.0/16 [90/40640000] via 10.1.1.6, 00:26:25, Serial1
   10.0.0.0/30 is subnetted, 2 subnets
C    10.1.1.0 is directly connected, Serial0
C    10.1.1.4 is directly connected, Serial1
   146.6.0.0/20 is subnetted, 1 subnets
D    146.6.0.0 [90/40640000] via 10.1.1.6, 00:26:27, Serial1


Modify the configuration on Router B to redistribute the
classful EIGRP routes into OSPF.

router ospf 1
 redistribute eigrp 1

When the command redistribute eigrp 1 is entered, the router
will give you the following friendly reminder:

rtrB(config-router)#redistribute eigrp 1
% Only classful networks will be redistributed

Determine the routes that have been redistributed by
examining the IP routing table on Router A.

rtrA#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
   1.0.0.0/32 is subnetted, 1 subnets
C    1.1.1.1 is directly connected, Loopback0
O E2 205.5.5.0/24 [110/20] via 10.1.1.2, 00:33:23, Serial0/1
O E2 5.0.0.0/8 [110/20] via 10.1.1.2, 00:33:23, Serial0/1
O E2 145.5.0.0/16 [110/20] via 10.1.1.2, 00:33:23, Serial0/1
   10.0.0.0/30 is subnetted, 1 subnets
C    10.1.1.0 is directly connected, Serial0/1

nly the EIGRP classful routes were redistributed into OSPF.
As you can see in the routing table on Router A, EIGRP
routes were redistributed as external type 2 with a cost or
metric of 20. This information can also be found by
inspecting the OSPF database on Router B.

rtrB#show ip ospf database external
    OSPF Router with ID (2.2.2.2) (Process ID 1)
        Type-5 AS External Link States
 LS age: 410
 Options: (No TOS-capability, DC)
 LS Type: AS External Link
 Link State ID: 5.0.0.0 (External Network Number )
 Advertising Router: 2.2.2.2
 LS Seq Number: 80000004
 Checksum: 0x642C
 Length: 36
 Network Mask: /8
    Metric Type: 2 (Larger than any link state path)
    TOS: 0
    Metric: 20
    Forward Address: 0.0.0.0
    External Route Tag: 0
 LS age: 419
 Options: (No TOS-capability, DC)
 LS Type: AS External Link
 Link State ID: 145.5.0.0 (External Network Number )
 Advertising Router: 2.2.2.2
 LS Seq Number: 80000004
 Checksum: 0x5F9
 Length: 36
 Network Mask: /16
    Metric Type: 2 (Larger than any link state path)
    TOS: 0
    Metric: 20
    Forward Address: 0.0.0.0
    External Route Tag: 0
 LS age: 435
 Options: (No TOS-capability, DC)
 LS Type: AS External Link
 Link State ID: 205.5.5.0 (External Network Number )
 Advertising Router: 2.2.2.2
 LS Seq Number: 80000004
 Checksum: 0xBEFE
 Length: 36
 Network Mask: /24
    Metric Type: 2 (Larger than any link state path)
    TOS: 0
    Metric: 20
    Forward Address: 0.0.0.0
    External Route Tag: 0
this is mine confregation so some data like ip address mi
modified nad some data is omoted