Prerequisites: CCNP level skills.
Note!
Use the basic EIGRP configuration (Task 1) in the labs 45-53.
EIGRP filtering can use:
- Standard ACL.
- Extended ACL.
- Prefix-List.
- Route-Map.
- Administrative Distance.
- Passive-Interface.
- Offset-List.
- Stub Routing.
- Selective Stub Routing (stub routing with leak map).
Pic. 1 - Topology Diagram.
Icons designed by: Andrzej Szoblik - http://www.newo.plTask 1
Make sure that R4 has two paths towards towards Loopback 0 and Loopback 1 of R3.
Task 2
On R1 create a standard ACL based filtering so that it prefers the next hop 10.1.13.3 towards 172.16.103.3 and the next-hop 10.1.123.0/24 towards 172.16.133.0/24.
Lab Solution
Task 1
Configure EIGRP according to the topology diagram (pic. 1).
Make sure that R4 has two paths towards towards Loopback 0 and Loopback 1 of R3.
R1 Configuration:
!
interface Loopback0
ip address 172.16.101.1 255.255.255.0
!
interface Serial0/0
ip address 10.1.123.1 255.255.255.0
encapsulation frame-relay
serial restart-delay 0
frame-relay map ip 10.1.123.2 103
frame-relay map ip 10.1.123.3 103 broadcast
no frame-relay inverse-arp
!
interface Serial0/1
ip address 10.1.13.1 255.255.255.0
serial restart-delay 0
!
router eigrp 1
network 10.1.13.1 0.0.0.0
network 10.1.123.1 0.0.0.0
network 10.1.124.1 0.0.0.0
network 172.16.101.1 0.0.0.0
no auto-summary
!
ip address 172.16.101.1 255.255.255.0
!
interface Serial0/0
ip address 10.1.123.1 255.255.255.0
encapsulation frame-relay
serial restart-delay 0
frame-relay map ip 10.1.123.2 103
frame-relay map ip 10.1.123.3 103 broadcast
no frame-relay inverse-arp
!
interface Serial0/1
ip address 10.1.13.1 255.255.255.0
serial restart-delay 0
!
router eigrp 1
network 10.1.13.1 0.0.0.0
network 10.1.123.1 0.0.0.0
network 10.1.124.1 0.0.0.0
network 172.16.101.1 0.0.0.0
no auto-summary
!
R2 Configuration:
!
interface Loopback0
ip address 172.16.102.2 255.255.255.0
!
interface Serial0/0
ip address 10.1.123.2 255.255.255.0
encapsulation frame-relay
serial restart-delay 0
frame-relay map ip 10.1.123.1 203
frame-relay map ip 10.1.123.3 203 broadcast
no frame-relay inverse-arp
!
router eigrp 1
network 10.1.123.2 0.0.0.0
network 10.1.124.2 0.0.0.0
network 172.16.102.2 0.0.0.0
no auto-summary
!
ip address 172.16.102.2 255.255.255.0
!
interface Serial0/0
ip address 10.1.123.2 255.255.255.0
encapsulation frame-relay
serial restart-delay 0
frame-relay map ip 10.1.123.1 203
frame-relay map ip 10.1.123.3 203 broadcast
no frame-relay inverse-arp
!
router eigrp 1
network 10.1.123.2 0.0.0.0
network 10.1.124.2 0.0.0.0
network 172.16.102.2 0.0.0.0
no auto-summary
!
R3 Configuration:
!
interface Loopback0
ip address 172.16.103.3 255.255.255.0
!
interface Loopback1
ip address 172.16.133.3 255.255.255.0
!
interface Serial0/0
ip address 10.1.123.3 255.255.255.0
encapsulation frame-relay
no ip split-horizon eigrp 1
serial restart-delay 0
frame-relay map ip 10.1.123.1 301 broadcast
frame-relay map ip 10.1.123.2 302 broadcast
no frame-relay inverse-arp
!
interface Serial0/1
ip address 10.1.13.3 255.255.255.0
serial restart-delay 0
!
router eigrp 1
network 10.1.13.3 0.0.0.0
network 10.1.123.3 0.0.0.0
network 172.16.103.3 0.0.0.0
network 172.16.133.3 0.0.0.0
no auto-summary
!
ip address 172.16.103.3 255.255.255.0
!
interface Loopback1
ip address 172.16.133.3 255.255.255.0
!
interface Serial0/0
ip address 10.1.123.3 255.255.255.0
encapsulation frame-relay
no ip split-horizon eigrp 1
serial restart-delay 0
frame-relay map ip 10.1.123.1 301 broadcast
frame-relay map ip 10.1.123.2 302 broadcast
no frame-relay inverse-arp
!
interface Serial0/1
ip address 10.1.13.3 255.255.255.0
serial restart-delay 0
!
router eigrp 1
network 10.1.13.3 0.0.0.0
network 10.1.123.3 0.0.0.0
network 172.16.103.3 0.0.0.0
network 172.16.133.3 0.0.0.0
no auto-summary
!
R4 Configuration:
!
interface Loopback0
ip address 172.16.104.4 255.255.255.0
!
interface Loopback1
ip address 172.16.144.4 255.255.255.0
!
interface FastEthernet1/0
ip address 10.1.124.4 255.255.255.0
duplex auto
speed auto
!
router eigrp 1
network 10.1.124.4 0.0.0.0
network 172.16.104.4 0.0.0.0
network 172.16.144.4 0.0.0.0
no auto-summary
ip address 172.16.104.4 255.255.255.0
!
interface Loopback1
ip address 172.16.144.4 255.255.255.0
!
interface FastEthernet1/0
ip address 10.1.124.4 255.255.255.0
duplex auto
speed auto
!
router eigrp 1
network 10.1.124.4 0.0.0.0
network 172.16.104.4 0.0.0.0
network 172.16.144.4 0.0.0.0
no auto-summary
!
Verification:
Pic. 2 - R4's Routing Table.
Task 2On R1 create a standard ACL based filtering so that it prefers the next hop 10.1.13.3 towards 172.16.103.3 and the next-hop 10.1.123.0/24 towards 172.16.133.0/24.
Pic. 3 - Current Routing Table on R1.
R1 Configuration:!
access-list 1 deny 172.16.133.0 0.0.0.255
access-list 1 permit any
access-list 2 deny 172.16.103.0 0.0.0.255
access-list 2 permit any
!
router eigrp 1
network 10.1.13.1 0.0.0.0
network 10.1.123.1 0.0.0.0
network 10.1.124.1 0.0.0.0
network 172.16.101.1 0.0.0.0
distribute-list 2 in Serial0/0
distribute-list 1 in Serial0/1
no auto-summary
access-list 1 permit any
access-list 2 deny 172.16.103.0 0.0.0.255
access-list 2 permit any
!
router eigrp 1
network 10.1.13.1 0.0.0.0
network 10.1.123.1 0.0.0.0
network 10.1.124.1 0.0.0.0
network 172.16.101.1 0.0.0.0
distribute-list 2 in Serial0/0
distribute-list 1 in Serial0/1
no auto-summary
!
Notice!
After applying the distribute lists it takes about 3-5 seconds to re-synch neighbors.
Verification:
Pic. 4 - EIGRP Routing Table on R1.