Initial
configuration on each routers. As below:
R1#sh ip int br | e
una
Interface IP-Address OK? Method Status Protocol
Serial1/0 11.0.0.2 YES manual up up
Serial1/1 11.0.0.6 YES manual up up
Serial1/2 10.0.0.1 YES manual up up
Loopback0 1.1.1.1 YES manual up up
R2#sh ip int br | e
una
Interface IP-Address OK? Method Status Protocol
Serial1/0 10.0.0.2 YES manual up up
Serial1/1 10.0.0.5 YES manual up up
Loopback0 2.2.2.2 YES manual up up
R3#sh ip int br | e
una
Interface IP-Address OK? Method Status Protocol
Serial1/0 10.0.0.6 YES manual up up
Serial1/1 10.0.0.9 YES manual up up
Loopback0 3.3.3.3 YES manual up up
R4#sh ip int br | e
una
Interface IP-Address OK? Method Status Protocol
Serial1/0 10.0.0.10 YES manual up up
Serial1/1 11.0.0.9 YES manual up up
Serial1/2 11.0.0.13 YES manual up up
Loopback0 4.4.4.4 YES manual up up
R5#sh ip int b | e
una
Interface IP-Address OK? Method Status Protocol
Serial1/0 11.0.0.10 YES manual up up
Loopback0 50.0.0.1 YES manual up up
Loopback1 50.1.1.1 YES manual up up
Loopback2 50.2.2.1 YES manual up up
R6#sh ip int b | e
una
Interface IP-Address OK? Method Status Protocol
Serial1/0 11.0.0.14 YES manual up up
Loopback0 60.0.0.1 YES manual up up
Loopback1 60.1.1.1 YES manual up up
Loopback2 60.2.2.1 YES manual up up
R7#sh ip int b | e
una
Interface IP-Address OK? Method Status Protocol
Serial1/0 11.0.0.1 YES manual up up
Loopback0 70.0.0.1 YES manual up up
Loopback1 70.1.1.1 YES manual up up
Loopback2 70.2.2.1 YES manual up up
R8#sh ip int b | e
una
Interface IP-Address OK? Method Status Protocol
Serial1/0 11.0.0.5 YES manual up up
Loopback0 80.0.0.1 YES manual up up
Loopback1 80.1.1.1 YES manual up up
Loopback2 80.2.2.1 YES manual up up
When designing MPLS
Keep in mind about the MPLS Architecture.
1. Virtual Routing Forwarding
2. Route Distinguisher
3. PE-CE routing
4. Router Target
5. Route Propagation through M-BGP.
6. Redistribute from PE - MBGP and vise versa .
Step 3 : PE-CE routing
Here
we are going to enable RIP
as our PE-CE routing between R1 and R7.
R1(config)#router
rip
R1(config-router)#address-family
ipv4 vrf a
R1(config-router-af)#network
11.0.0.0
R1(config-router-af)#no
au
R1(config-router-af)#ver
2
R7(config)#router
rip
R7(config-router)#net
11.0.0.0
R7(config-router)#net
70.0.0.0
R7(config-router)#no
au
R7(config-router)#ver
2
Now on PE (R1) we
might have got the rip routes. Lets check it.
R1#sh ip route vrf a
| be Ga
Gateway of last
resort is not set
70.0.0.0/24 is subnetted, 3 subnets
R 70.2.2.0 [120/1] via 11.0.0.1, 00:00:04,
Serial1/0
R 70.1.1.0 [120/1] via 11.0.0.1, 00:00:04,
Serial1/0
R 70.0.0.0 [120/1] via 11.0.0.1, 00:00:04,
Serial1/0
11.0.0.0/30 is subnetted, 1 subnets
C 11.0.0.0 is directly connected,
Serial1/0
R1#
Now
lets enable eBGP as our
PE-CE routing between R4 and R5.
R4(config)#router
bgp 100
R4(config-router)#address-family
ipv4 vrf a
R4(config-router-af)#neighbor
11.0.0.10 remote-as 65031
R5(config)#router
bgp 65031
R5(config-router)#neighbor
11.0.0.9 remote-as 100
R5(config-router)#network
50.0.0.0 mask 255.255.255.0
R5(config-router)#network
50.1.1.0 mask 255.255.255.0
R5(config-router)#network
50.2.2.0 mask 255.255.255.0
R4#sh ip route vrf a
| be Ga
Gateway of last
resort is not set
50.0.0.0/24 is subnetted, 3 subnets
B 50.2.2.0 [20/0] via 11.0.0.10, 00:01:07
B 50.1.1.0 [20/0] via 11.0.0.10, 00:01:07
B 50.0.0.0 [20/0] via 11.0.0.10, 00:01:07
11.0.0.0/30 is subnetted, 1 subnets
C 11.0.0.8 is directly connected,
Serial1/1
Now
lets enable EIGRP as our
PE-CE routing between R1 and R5.
Note: Here I have
changed the topology.
R1(config)#router
eigrp 1
R1(config-router)#address-family
ipv4 vrf a
R1(config-router-af)#network
11.0.0.0 0.0.0.3
R1(config-router-af)#no
au
R1(config-router-af)#autonomous-system
10
R5(config)#router eigrp 10
R5(config-router)#net
11.0.0.0 0.0.0.3
R5(config-router)#net
50.0.0.0 0.255.255.255
R5(config-router)#no
au
R5#sh ip eigrp ne
IP-EIGRP neighbors
for process 10
H Address Interface Hold Uptime SRTT
RTO Q Seq
(sec) (ms) Cnt Num
0 11.0.0.1 Se0/0 12 00:00:07 48
288 0 4
R1#sh ip route vrf a
| be Ga
Gateway of last
resort is not set
50.0.0.0/24 is subnetted, 3 subnets
D 50.2.2.0 [90/2297856] via 11.0.0.2,
00:00:33, Serial0/0
D 50.1.1.0 [90/2297856] via 11.0.0.2,
00:00:33, Serial0/0
D 50.0.0.0 [90/2297856] via 11.0.0.2,
00:00:33, Serial0/0
11.0.0.0/30 is subnetted, 1 subnets
C 11.0.0.0 is directly connected,
Serial0/0
Now
lets enable OSPF as our
PE-CE routing between R3 and R4.
R4(config)#router
ospf 1
R4(config-router)#net
11.0.0.4 0.0.0.3 a 0
R4(config-router)#net
40.0.0.0 0.255.255.255 a 0
R3(config)#router
ospf 10 vrf a
R3(config-router)#network
11.0.0.4 0.0.0.3 a 0
R3#sh ip route vrf a
| be Ga
Gateway of last
resort is not set
40.0.0.0/32 is subnetted, 3 subnets
O 40.2.2.1 [110/65] via 11.0.0.6,
00:00:38, Serial0/0
O 40.1.1.1 [110/65] via 11.0.0.6,
00:00:38, Serial0/0
O 40.0.0.1 [110/65] via 11.0.0.6,
00:00:38, Serial0/0
11.0.0.0/30 is subnetted, 1 subnets
C 11.0.0.4 is directly connected,
Serial0/0
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