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OSPF as PE-CE protocol- MPLS – Different area ( area 0 and area 1)

OSPF as PE-CE protocol- MPLS – Different area ( area 0 and area 1)





PC1:-

PC1> ip 10.1.1.10
255.255.255.0 10.1.1.1
Checking for duplicate
address…
PC1 : 10.1.1.10
255.255.255.0 gateway 10.1.1.1
R1:-
R1(config)#int fa0/0
R1(config-if)#ip add
10.1.1.1 255.255.255.0
R1(config-if)#no shut
R1(config-if)#int
fa2/0
R1(config-if)#ip add
12.12.12.1 255.255.255.0
R1(config-if)#no shut
R1(config-if)#int lo0
R1(config-if)#ip add
1.1.1.1 255.255.255.255
R1(config)#router ospf
1
R1(config-router)#
log-adjacency-changes
R1(config-router)#
network 1.1.1.1 0.0.0.0 area 0
R1(config-router)#
network 10.1.1.1 0.0.0.0 area 0
R1(config-router)#
network 12.12.12.1 0.0.0.0 area 0
R2:-
R2(config)#ip vrf
cust1
R2(config-vrf)#rd
100:1
R2(config-vrf)#route-target
200:1
R2(config-vrf)#int
fa2/0
R2(config-if)#ip vrf
for cust1
R2(config-if)#ip add
12.12.12.2 255.255.255.0
R2(config-if)#no shut
R2(config-if)#int
fa0/0
R2(config-if)#ip add
23.23.23.2 255.255.255.0
R2(config-if)#mpls ip
R2(config-if)#no shut
R2(config-if)#int lo0
R2(config-if)#ip add
2.2.2.2 255.255.255.255
R2(config-if)#mpls ldp
router lo0 force
R2(config)#router ospf
1
R2(config-router)#router-id
2.2.2.2
R2(config-router)#net
23.23.23.2 0.0.0.0 are
R2(config-router)#net
23.23.23.2 0.0.0.0 area 0
R2(config-router)#network
2.2.2.2 0.0.0.0 area 0
R2(config-if)#router
bgp 1
R2(config-router)#neighbor
4.4.4.4 remote-as 1
R2(config-router)#neighbor
4.4.4.4 update-source lo0
R2(config-router)#address-family
vpnv4
R2(config-router-af)#neighbor
4.4.4.4 activate
R2(config-router-af)#exit
R2(config-router)#address-family
ipv4 vrf cust1
R2(config-router-af)#redistribute
ospf 100 vrf cust1 metric 10
R2(config-router-af)#exit
R2(config-router)#router
ospf 100 vrf cust1
R2(config-router)#
log-adjacency-changes
R2(config-router)#
redistribute bgp 1 subnets
R2(config-router)#
network 12.12.12.2 0.0.0.0 area 0
R3:-
R3(config)#int lo0
R3(config-if)#ip add
3.3.3.3 255.255.255.255
R3(config-if)#exit
R3(config)#mpls ldp
router lo0 force
R3(config)#int fa0/0
R3(config-if)#ip add
23.23.23.3 255.255.255.0
R3(config-if)#mpls ip
R3(config-if)#no shut
R3(config-if)#int
fa1/0
R3(config-if)#ip add
34.34.34.3 255.255.255.0
R3(config-if)#mpls ip
R3(config-if)#no shut
R3(config-if)#router
ospf 1
R3(config-router)#router-id
3.3.3.3
R3(config-router)#net
23.23.23.3 0.0.0.0 area 0
R3(config-router)#net
34.34.34.3 0.0.0.0 are 0
R3(config-router)#net
3.3.3.3 0.0.0.0 area 0
R3(config-router)#exit
R4:-
R4(config)#int lo0
R4(config-if)#ip add
4.4.4.4 255.255.255.255
R4(config-if)#int fa1/0
R4(config-if)#ip add
34.34.34.4 255.255.255.0
R4(config-if)#mpls ip
R4(config-if)#no shut
R4(config-if)#exit
R4(config)#mpls ldp
router lo0 force
R4(config)#ip vrf
cust1
R4(config-vrf)#rd 1:1
R4(config-vrf)#route-target
200:1
R4(config-vrf)#exit
R4(config)#int fa2/0
R4(config-if)#ip vrf
for cust1
R4(config-if)#ip add
45.45.45.4 255.255.255.0
R4(config-if)#no shut
R4(config-if)#router
ospf 1
R4(config-router)#router-id
4.4.4.4
R4(config-router)#net
34.34.34.4 0.0.0.0 area 0
R4(config-router)#network
4.4.4.4 0.0.0.0 area 0
R4(config)#router bgp
1
R4(config-router)#neighbor
2.2.2.2 remote-as 1
R4(config-router)#neighbor
2.2.2.2 update-source lo0
R4(config-router)#address-family
vpnv4
R4(config-router-af)#neighbor
2.2.2.2 activate
R4(config-router-af)#addres
ipv4 vrf cust1
R4(config-router-af)# 
redistribute ospf 100 vrf cust1
R4(config-router-af)#exit
R4(config-router)#exit
R4(config-router-af)#router
ospf 100 vrf cust1
R4(config-router)#net
45.45.45.4 0.0.0.0 area 1
R5:-


R5(config)#int lo0
R5(config-if)#ip add
5.5.5.5 255.255.255.255
R5(config-if)#int
fa2/0
R5(config-if)#ip add
45.45.45.5 255.255.255.0
R5(config-if)#no shut
R5(config)#int fa0/0
R5(config-if)#ip add
20.1.1.1 255.255.255.0
R5(config-if)#no shut
R5(config)#router ospf
100
R5(config-router)#net
5.5.5.5 0.0.0.0 area 1
R5(config-router)#net
45.45.45.5 0.0.0.0 area 1
R5(config-router)#net
20.1.1.1 0.0.0.0 area 1
Verification:-
PC1:-
PC1> ping 20.1.1.10
84 bytes from
20.1.1.10 icmp_seq=1 ttl=59 time=368.619 ms
84 bytes from
20.1.1.10 icmp_seq=2 ttl=59 time=347.316 ms
84 bytes from
20.1.1.10 icmp_seq=3 ttl=59 time=368.788 ms
84 bytes from
20.1.1.10 icmp_seq=4 ttl=59 time=416.798 ms
84 bytes from
20.1.1.10 icmp_seq=5 ttl=59 time=379.615 ms
PC1> trace
20.1.1.10
trace to 20.1.1.10, 8
hops max, press Ctrl+C to stop
 1  
10.1.1.1   98.128 ms  32.396 ms  38.933 ms
 2  
12.12.12.2   193.647 ms  120.998 ms  111.703 ms
 3 
 23.23.23.3   309.530 ms  294.889 ms  276.499 ms
 4  
45.45.45.4   289.342 ms  309.988 ms  292.062 ms
 5  
45.45.45.5   329.599 ms  272.541 ms  341.644 ms
 6  
*20.1.1.10   345.620 ms (ICMP type:3, code:3, Destination port
unreachable)
R1:-
R1#sh ip route
Codes: L – local, C –
connected, S – static, 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
      
i – IS-IS, su – IS-IS summary, 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, H – NHRP
      
+ – replicated route, % – next hop override
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
     
5.0.0.0/32 is subnetted, 1 subnets
O
IA     5.5.5.5 [110/3] via 12.12.12.2, 00:27:59,
FastEthernet2/0  -<< Intraarea route
become Interarea route when ospf routes crosses MPLS core and PE are in same
OSPF process ID.Metric is also remain same throughout the MPLS cloud.
     
10.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C       
10.1.1.0/24 is directly connected, FastEthernet0/0
L       
10.1.1.1/32 is directly connected, FastEthernet0/0
     
12.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C       
12.12.12.0/24 is directly connected, FastEthernet2/0
L       
12.12.12.1/32 is directly connected, FastEthernet2/0
     
20.0.0.0/24 is subnetted, 1 subnets
O
IA     20.1.1.0 [110/3] via 12.12.12.2, 00:27:59,
FastEthernet2/0
     
45.0.0.0/24 is subnetted, 1 subnets
O
IA     45.45.45.0 [110/2] via 12.12.12.2, 00:28:12,
FastEthernet2/0
R1#sh ip ospf neighbor
Neighbor
ID     Pri  
State           Dead
Time   Address        
Interface
12.12.12.2       
1   FULL/BDR       
00:00:39    12.12.12.2     
FastEthernet2/0
R2:-
R2#sh ip ospf 100
neighbor
Neighbor
ID     Pri  
State           Dead
Time   Address        
Interface
1.1.1.1          
1   FULL/DR        
00:00:33    12.12.12.1     
FastEthernet2/0
R2#sh ip ospf 200
neighbor
%OSPF: No router
process 200
R2#sh ip ospf 1
neighbor
Neighbor
ID     Pri  
State           Dead
Time   Address        
Interface
3.3.3.3          
1   FULL/BDR       
00:00:34    23.23.23.3     
FastEthernet0/0
R2#sh ip route vrf
cust1
Routing Table: cust1
Codes: L – local, C –
connected, S – static, 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
      
i – IS-IS, su – IS-IS summary, 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, H – NHRP
      
+ – replicated route, % – next hop override
Gateway of last resort
is not set
     
1.0.0.0/32 is subnetted, 1 subnets
O       
1.1.1.1 [110/2] via 12.12.12.1, 00:29:23, FastEthernet2/0
     
5.0.0.0/32 is subnetted, 1 subnets
B       
5.5.5.5 [200/2] via 4.4.4.4, 00:21:53
     
10.0.0.0/24 is subnetted, 1 subnets–<<
OSPF metric is copied to BGP metric
O       
10.1.1.0 [110/2] via 12.12.12.1, 00:29:23, FastEthernet2/0
     
12.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C       
12.12.12.0/24 is directly connected, FastEthernet2/0
L       
12.12.12.2/32 is directly connected, FastEthernet2/0
     
20.0.0.0/24 is subnetted, 1 subnets
B       
20.1.1.0 [200/2] via 4.4.4.4, 00:21:53
     
45.0.0.0/24 is subnetted, 1 subnets
B       
45.45.45.0 [200/0] via 4.4.4.4, 00:22:07
R2#show ip bgp vpnv4
all summary
BGP router identifier
2.2.2.2, local AS number 1
BGP table version is
52, main routing table version 52
9 network entries
using 1368 bytes of memory
9 path entries using
468 bytes of memory
4/4 BGP path/bestpath
attribute entries using 528 bytes of memory
2 BGP extended
community entries using 80 bytes of memory
0 BGP route-map cache
entries using 0 bytes of memory
0 BGP filter-list
cache entries using 0 bytes of memory
BGP using 2444 total
bytes of memory
BGP activity 23/14
prefixes, 30/21 paths, scan interval 60 secs
Neighbor       
V           AS MsgRcvd
MsgSent   TblVer  InQ OutQ Up/Down  State/PfxRcd
4.4.4.4        
4       
    1     437    
432       52    0   
0 06:19:48        3
R2#show ip bgp summary
BGP router identifier
2.2.2.2, local AS number 1
BGP table version is
1, main routing table version 1
Neighbor       
V           AS MsgRcvd
MsgSent   TblVer  InQ OutQ Up/Down  State/PfxRcd
4.4.4.4        
4           
1     437    
432        1   
0    0 06:19:55        0
R2#show ip bgp vpnv4
all
BGP table version is
52, local router ID is 2.2.2.2
Status codes: s
suppressed, d damped, h history, * valid, > best, i – internal,
             
r RIB-failure, S Stale, m multipath, b backup-path, x best-external
Origin codes: i – IGP,
e – EGP, ? – incomplete
  
Network          Next
Hop            Metric
LocPrf Weight Path
Route Distinguisher:
1:1
*>i5.5.5.5/32      
4.4.4.4                 
2    100      0 ?
*>i20.1.1.0/24     
4.4.4.4                 
2    100      0 ?
*>i45.45.45.0/24   
4.4.4.4                 
0    100      0 ?
Route Distinguisher:
100:1 (default for vrf cust1)
*>
1.1.1.1/32      
12.12.12.1             
10         32768 ?
*>i5.5.5.5/32      
4.4.4.4                 
2    100      0 ?
*>
10.1.1.0/24     
12.12.12.1             
10         32768 ?
*>
12.12.12.0/24   
0.0.0.0          
       0        
32768 ?
*>i20.1.1.0/24     
4.4.4.4                 
2    100      0 ?
*>i45.45.45.0/24   
4.4.4.4                 
0    100      0 ?
R2#show ip bgp vpnv4
all 20.1.1.0/24
BGP routing table
entry for 1:1:20.1.1.0/24, version 50
Paths: (1 available,
best #1, no table)
  Not advertised
to any peer
  Local
   
4.4.4.4 (metric 3) from 4.4.4.4 (4.4.4.4)
     
Origin incomplete, metric 2, localpref 100, valid, internal, best
     
Extended Community: RT:200:1 OSPF DOMAIN ID:0x0005:0x000000640200
       
OSPF RT:0.0.0.0:2:0 OSPF ROUTER ID:45.45.45.4:0
     
mpls labels in/out nolabel/24
BGP routing table
entry for 100:1:20.1.1.0/24, version 52
Paths: (1 available,
best #1, table cust1)
  Not advertised
to any peer
  Local, imported
path from 1:1:20.1.1.0/24
   
4.4.4.4 (metric 3) from 4.4.4.4 (4.4.4.4)
     
Origin incomplete, metric 2, localpref 100, valid, internal, best
     
Extended Community: RT:200:1 OSPF DOMAIN ID:0x0005:0x000000640200
       
OSPF RT:0.0.0.0:2:0 OSPF ROUTER ID:45.45.45.4:0
     
mpls labels in/out nolabel/24
R2#show mpls forwarding-table
Local     
Outgoing  
Prefix           Bytes
Label   Outgoing   Next Hop
Label     
Label      or Tunnel Id    
Switched      interface
16        
Pop Label  34.34.34.0/24   
0            
Fa0/0      23.23.23.3
18        
No Label   12.12.12.0/24[V]
0            
aggregate/cust1
19        
16        
4.4.4.4/32      
0            
Fa0/0      23.23.23.3
20        
Pop Label  3.3.3.3/32      
0            
Fa0/0      23.23.23.3
21        
No Label   1.1.1.1/32[V]   
0            
Fa2/0      12.12.12.1
22        
No Label   10.1.1.0/24[V]  
490          
Fa2/0      12.12.12.1
R3:-
R3#sh ip ospf neighbor
Neighbor
ID     Pri  
State           Dead
Time   Address        
Interface
4.4.4.4          
1   FULL/BDR       
00:00:35    34.34.34.4     
FastEthernet1/0
2.2.2.2          
1   FULL/DR        
00:00:31    23.23.23.2     
FastEthernet0/0
R3#show mpls ldp
neighbor    
Peer LDP Ident:
4.4.4.4:0; Local LDP Ident 3.3.3.3:0
       
TCP connection: 4.4.4.4.21070 – 3.3.3.3.646
       
State: Oper; Msgs sent/rcvd: 101/102; Downstream
       
Up time: 01:22:35
       
LDP discovery sources:
         
FastEthernet1/0, Src IP addr: 34.34.34.4
       
Addresses bound to peer LDP Ident:
         
34.34.34.4      4.4.4.4
   
Peer LDP Ident: 2.2.2.2:0; Local LDP Ident 3.3.3.3:0
       
TCP connection: 2.2.2.2.646 – 3.3.3.3.30173
       
State: Oper; Msgs sent/rcvd: 102/100; Downstream
       
Up time: 01:22:35
       
LDP discovery sources:
         
FastEthernet0/0, Src IP addr: 23.23.23.2
       
Addresses bound to peer LDP Ident:
         
23.23.23.2      2.2.2.2
R3#show mpls ldp
discovery
 Local LDP
Identifier:
   
3.3.3.3:0
   
Discovery Sources:
   
Interfaces:
       
FastEthernet0/0 (ldp): xmit/recv
           
LDP Id: 2.2.2.2:0
       
FastEthernet1/0 (ldp): xmit/recv
           
LDP Id: 4.4.4.4:0
R3#show mpls
forwarding-table
Local     
Outgoing  
Prefix           Bytes
Label   Outgoing   Next Hop
Label     
Label      or Tunnel Id    
Switched      interface
16        
Pop Label  4.4.4.4/32      
14366        
Fa1/0      34.34.34.4
17        
Pop Label  2.2.2.2/32       15433
        Fa0/0     
23.23.23.2
R4:-
R4#sh ip ospf 1
neighbor
Neighbor
ID     Pri  
State           Dead
Time   Address        
Interface
3.3.3.3          
1   FULL/DR        
00:00:38    34.34.34.3     
FastEthernet1/0
R4#sh ip ospf 100
neighbor
Neighbor
ID     Pri  
State           Dead
Time   Address         Interface
5.5.5.5          
1   FULL/DR        
00:00:31    45.45.45.5     
FastEthernet2/0
R4#sh ip bgp vpnv4 all
summary
BGP router identifier
4.4.4.4, local AS number 1
BGP table version is
40, main routing table version 40
9 network entries
using 1368 bytes of memory
9 path entries using
468 bytes of memory
4/4 BGP path/bestpath
attribute entries using 528 bytes of memory
2 BGP extended
community entries using 80 bytes of memory
0 BGP route-map cache
entries using 0 bytes of memory
0 BGP filter-list cache
entries using 0 bytes of memory
BGP using 2444 total
bytes of memory
BGP activity 21/12
prefixes, 24/15 paths, scan interval 60 secs
Neighbor       
V           AS MsgRcvd
MsgSent   TblVer  InQ OutQ Up/Down  State/PfxRcd
2.2.2.2        
4            1    
440     446      
40    0    0
06:27:49        3
R4#show ip bgp summary
BGP router identifier
4.4.4.4, local AS number 1
BGP table version is
1, main routing table version 1
Neighbor       
V           AS MsgRcvd
MsgSent   TblVer  InQ OutQ Up/Down  State/PfxRcd
2.2.2.2        
4           
1     440    
446        1    0   
0 06:27:57        0
R4#show ip bgp vpnv4
all
BGP table version is
40, local router ID is 4.4.4.4
Status codes: s
suppressed, d damped, h history, * valid, > best, i – internal,
             
r RIB-failure, S Stale, m multipath, b backup-path, x best-external
Origin codes: i – IGP,
e – EGP, ? – incomplete
  
Network          Next
Hop            Metric
LocPrf Weight Path
Route Distinguisher:
1:1 (default for vrf cust1)
*>i1.1.1.1/32      
2.2.2.2                
10    100      0 ?
*>
5.5.5.5/32      
45.45.45.5              
2         32768 ?
*>i10.1.1.0/24
     2.2.2.2                
10    100      0 ?
*>i12.12.12.0/24   
2.2.2.2                 
0    100      0 ?
*> 20.1.1.0/24     
45.45.45.5              
2         32768 ?
*>
45.45.45.0/24   
0.0.0.0                 
0         32768 ?
Route Distinguisher:
100:1
*>i1.1.1.1/32      
2.2.2.2                
10    100      0 ?
*>i10.1.1.0/24     
2.2.2.2                
10    100      0 ?
*>i12.12.12.0/24   
2.2.2.2                 
0    100      0 ?
R4#
R5:-
R5# sh ip route
Codes: L – local, C –
connected, S – static, 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
      
i – IS-IS, su – IS-IS summary, 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, H – NHRP
      
+ – replicated route, % – next hop override
Gateway of last resort
is not set
     
1.0.0.0/32 is subnetted, 1 subnets
O
IA     1.1.1.1 [110/11] via 45.45.45.4, 00:44:22,
FastEthernet2/0
     
5.0.0.0/32 is subnetted, 1 subnets
C       
5.5.5.5 is directly connected, Loopback0
     
10.0.0.0/24 is subnetted, 1 subnets
O
IA     10.1.1.0 [110/11] via 45.45.45.4, 00:44:22,
FastEthernet2/0
     
12.0.0.0/24 is subnetted, 1 subnets
O
IA     12.12.12.0 [110/2] via 45.45.45.4, 00:44:22,
FastEthernet2/0
     
20.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C       
20.1.1.0/24 is directly connected, FastEthernet0/0
L       
20.1.1.1/32 is directly connected, FastEthernet0/0
     
45.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C       
45.45.45.0/24 is directly connected, FastEthernet2/0
L       
45.45.45.5/32 is directly connected, FastEthernet2/0