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What is the difference between OSPF Exteral Type 1 (O E1) &
External Type 2 (O E2) routes????
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Answer Posted / jitendera kuamr sin ha
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
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