casestudy4_2011_07

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AR Ngee Ann Polytechnic

Dip in NSS SoE/ECE

CaseStudy 4 1 of 4 Jul 2011

Advanced Routing

Requirements

1. Configure interfaces with IP addresses as shown.2. Add the loopback interfaces Lo 0-3 on R1 to OSPF Area 40.3. Summarize this area to the backbone with the most efficient mask4. Add interfaces Lo129 and Lo130 and the connection between R1 and

R1 to OSPF area 0.

5. OSPF Area 30 is a totally stubby area.6. Configure int S0/1 of R2 and all interfaces of R3 to be in EIGRP

domain.

7. Disable EIGRP auto-summarization for both R2 & R3. SummarizeR3 loopbacks to R2.

8. Redistribute EIGRP routes into OSPF with seed metric of 30. Theredistributed routes should be External Type 1 routes.

9. Redistribute all OSPF routes into EIGRP domain, with the followingseed metric, Bandwidth 1544 kbps, Delay 100 us, Reliability 255,

Load 150 and MTU 1500.

10. Hosts connected to R1s LAN should obtain their IP addressesdynamically using R2 as a DHCP server.

11. Configure R1 & R2 to be IBGP peers in your AS 65008. Peer R1 &R2 using their loopback addresses.

12. Peer R1 & R2 with R4 in BGP AS 65003 using their directlyconnected interfaces.

13. At R1 advertise the summarized route of Lo0 to Lo3 and Fa0/1 LANroute of R1 into BGP.

14. At R2 advertise the summarized route of Lo192, Lo200 and Lo208 ofR3 into BGP.

15. At R4 advertise Lo160 route into BGP.16. Configure ISP AS 65003 to advertise a default route to both eBGP

neighbors of AS 65008.

17. The default route will appear in R2 routing table as a B route. R3 willnot have a default route. Therefore on R3 configure 178.34.254.4 /30as the default network.

18. Configure AS65008 to prefer the link between R2 and R4 for alltraffic outbound towards ISP AS 65003.

19. Configure AS65008 so that inbound traffic from ISP AS65003 prefer(a) the link between R4 and R2 for traffic towards R3 loopbacks.(b) the link between R4 and R1 for traffic towards R1 loopbacks.

20. Extended ping from AS 65008 R1 Lo0 to ISP AS 65003 Lo160 withrecord option. Verify outbound traffic uses the link between R2 and

R4 and inbound traffic uses the link between R4 and R1.

21. Extended ping from AS 65008 R3 Lo192 to ISP AS 65003 Lo160with record option. Verify both inbound and outbound traffic uses the

link between R2 and R4.

CaseStudy 4

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Topology

Lo 0 178.34.0.1/24

Lo 1 178.34.1.1/24Lo 2 178.34.2.1/24

Lo 3 178.34.3.1/24R3

R4

R1 R2

Lo 192 178.34.192.1/21

Lo 200 178.34.200.1/21

Lo 208 178.34.208.1/20

S0/1

178.34.254.5/30

S0/1

178.34.254.6/30

Fa0/0178.34.128.2/24Fa0/0178.34.128.1/24

Fa0/1

178.34.4.1/22

DHCP

Server

Lo160 178.33.160.1 /19

BGP

65008

BGP

65003

OSPF

Area 40

OSPF

Area 30Totally

Stubby

OSPF

Area 0

EIGRP

65008

S0/1

195.18.18.1 /30

S0/1

195.18.18.2 /30S0/0

195.18.18.6 /30

S0/0

195.18.18.5 /30

Lo129 178.34.129.1/24 Lo130 178.34.130.1/24

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Tasks Show Command Check1 Verify interfaces IP address are correctly configured R*# Sh ip int brief

2 Verify loopback interfaces on R1 in OSPF Area 40. R1# Sh ip ospf int brief

3 Verify summary route of loopacks of R1 to the backboneR1# sh ip route

R2# sh ip route

4 Verify interfaces Lo129 & Lo130 and LAN connection between R1 and R2 in OSPF area 0R1# sh ip ospf int brief

R2# sh ip ospf int brief

5 Verify R1 Fa0/1 LAN is in OSPF area 30 and the area is totally stubbyR1# sh ip ospf int brief

R1# sh ip ospf | begin Area 30

6 Verify R1 and R2 are OSPF neighborsR1# sh ip ospf nei

R2# sh ip ospf nei

7 Verify R2 int S0/1 is in EIGRP domain R2# sh ip ei int

8 Verify all interfaces of R3 are in EIGRP domain R3# sh ip ei int

9 Verify R2 and R3 are EIGRP neighborsR2# sh ip ei nei

R3# sh ip ei nei

10 Verify R3 loopbacks is summarized to R2 R2# sh ip route

11 Verify EIGRP routes are redistributed into OSPFR2# sh ip protocol

R1# sh ip route

12 Verify OSPF routes are redistributed into EIGRPR2# sh ip protocol

R3# sh ip route

13 Verify R1s LAN is able to obtain IP addresses dynamically using R3 as a DHCP serverIpconfig

R2# sh ip dhcp binding

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14 Verify R1 and R2 are IBGP peers R1# sh ip bgp summR2# sh ip bgp summ

15 Verify R1 and R2 are EBGP peers with R4 R4# sh ip bgp summ

16 Verify summarized route of Lo0 to Lo3 is advertised into BGP at R1. R1# sh ip bgp

17 Verify summarized route of Lo192, Lo200 and Lo208 is advertised into BGP at R2. R2# sh ip bgp

18 Verify Lo160 is advertised into BGP at R4. R4# sh ip bgp

19 Verify default route is propagated from AS 65003 to AS 65008R1# sh ip bgp

R2# sh ip bgp

20 Verify R3 has a default route to R2 R3# sh ip route

21 Verify AS 65008 prefers the link between R2 and R4 for all traffic towards AS 65003 R2# sh ip bgp (178.33.160.0)

22

Verify traffic from ISP AS 65003

prefers the link between R4 and R2 for traffic towards R3 loopbacks and

prefers the link between R4 and R1 for traffic towards R1 loopbacks

R4# sh ip bgp

R1# sh access-listR1# sh route-map

R1# sh run | begin router bgp

R2# sh access-list

R2# sh route-map

R2# sh run | begin router bgp

23 Extended ping from AS 65008 R1 Lo0 to ISP AS 65003 Lo160 with record option ping with record option

24 Extended ping from AS 65008 R3 Lo192 to ISP AS 65003 Lo160 with record option ping with record option

casestudy4_2011_07

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