R1:
interface Loopback0
ip address 1.1.1.1 255.255.255.255
interface FastEthernet1/0
ip address 192.168.12.1 255.255.255.0
speed 100
duplex full
router rip
version 2
network 1.0.0.0
network 192.168.12.0
no auto-summary
R2:
interface Loopback0
ip address 2.2.2.2 255.255.255.255
interface FastEthernet1/0
ip address 192.168.23.2 255.255.255.0
speed 100
duplex full
mpls traffic-eng tunnels
interface FastEthernet1/1
ip address 192.168.24.2 255.255.255.0
speed 100
duplex full
mpls traffic-eng tunnels
ip vrf MSSK
rd 1:1
route-target export 1:1
route-target import 1:1
interface FastEthernet2/0
ip vrf forwarding MSSK
ip address 192.168.12.2 255.255.255.0
speed 100
duplex full
mpls traffic-eng tunnels
mpls traffic-eng auto-tunnel mesh
router ospf 1
router-id 2.2.2.2
network 2.2.2.2 0.0.0.0 area 0
network 192.168.23.2 0.0.0.0 area 0
network 192.168.24.2 0.0.0.0 area 0
mpls traffic-eng router-id Loopback0
mpls traffic-eng area 0
mpls traffic-eng mesh-group 10 Loopback0 area 0
router rip
address-family ipv4 vrf MSSK
redistribute bgp 1 metric 2
network 192.168.12.0
no auto-summary
version 2
exit-address-family
router bgp 1
bgp log-neighbor-changes
no bgp default ipv4-unicast
neighbor 6.6.6.6 remote-as 1
neighbor 6.6.6.6 update-source Loopback0
address-family vpnv4
neighbor 6.6.6.6 activate
neighbor 6.6.6.6 send-community both
exit-address-family
address-family ipv4 vrf MSSK
redistribute rip
exit-address-family
interface Auto-Template1
ip unnumbered Loopback0
tunnel mode mpls traffic-eng
tunnel destination mesh-group 10
tunnel mpls traffic-eng autoroute announce
tunnel mpls traffic-eng path-option 10 dynamic
R3:
interface Loopback0
ip address 3.3.3.3 255.255.255.255
interface FastEthernet1/0
ip address 192.168.23.3 255.255.255.0
speed 100
duplex full
mpls traffic-eng tunnels
interface FastEthernet1/1
ip address 192.168.36.3 255.255.255.0
speed 100
duplex full
mpls traffic-eng tunnels
interface FastEthernet2/0
ip address 192.168.35.3 255.255.255.0
speed 100
duplex full
mpls traffic-eng tunnels
mpls traffic-eng tunnels
mpls traffic-eng auto-tunnel mesh
router ospf 1
router-id 3.3.3.3
network 3.3.3.3 0.0.0.0 area 0
network 192.168.23.3 0.0.0.0 area 0
network 192.168.35.3 0.0.0.0 area 0
network 192.168.36.3 0.0.0.0 area 0
mpls traffic-eng router-id Loopback0
mpls traffic-eng area 0
mpls traffic-eng mesh-group 10 Loopback0 area 0
R4:
interface Loopback0
ip address 4.4.4.4 255.255.255.255
interface FastEthernet1/0
ip address 192.168.24.4 255.255.255.0
speed 100
duplex full
mpls traffic-eng tunnels
interface FastEthernet1/1
ip address 192.168.45.4 255.255.255.0
speed 100
duplex full
mpls traffic-eng tunnels
mpls traffic-eng tunnels
mpls traffic-eng auto-tunnel mesh
router ospf 1
router-id 4.4.4.4
network 4.4.4.4 0.0.0.0 area 0
network 192.168.24.4 0.0.0.0 area 0
network 192.168.45.4 0.0.0.0 area 0
mpls traffic-eng router-id Loopback0
mpls traffic-eng area 0
mpls traffic-eng mesh-group 10 Loopback0 area 0
R5:
interface Loopback0
ip address 5.5.5.5 255.255.255.255
interface FastEthernet1/0
ip address 192.168.56.5 255.255.255.0
speed 100
duplex full
mpls traffic-eng tunnels
interface FastEthernet1/1
ip address 192.168.45.5 255.255.255.0
speed 100
duplex full
mpls traffic-eng tunnels
interface FastEthernet2/0
ip address 192.168.35.5 255.255.255.0
speed 100
duplex full
mpls traffic-eng tunnels
mpls traffic-eng tunnels
mpls traffic-eng auto-tunnel mesh
router ospf 1
router-id 5.5.5.5
network 5.5.5.5 0.0.0.0 area 0
network 192.168.35.5 0.0.0.0 area 0
network 192.168.45.5 0.0.0.0 area 0
network 192.168.56.5 0.0.0.0 area 0
mpls traffic-eng router-id Loopback0
mpls traffic-eng area 0
mpls traffic-eng mesh-group 10 Loopback0 area 0
R6:
interface Loopback0
ip address 6.6.6.6 255.255.255.255
interface FastEthernet1/0
ip address 192.168.36.6 255.255.255.0
speed 100
duplex full
mpls traffic-eng tunnels
interface FastEthernet1/1
ip address 192.168.56.6 255.255.255.0
speed 100
duplex full
mpls traffic-eng tunnels
ip vrf MSSK
rd 1:1
route-target export 1:1
route-target import 1:1
interface FastEthernet2/0
ip vrf forwarding MSSK
ip address 192.168.67.6 255.255.255.0
speed 100
duplex full
mpls traffic-eng tunnels
mpls traffic-eng auto-tunnel mesh
router ospf 1
router-id 6.6.6.6
network 6.6.6.6 0.0.0.0 area 0
network 192.168.36.6 0.0.0.0 area 0
network 192.168.56.6 0.0.0.0 area 0
mpls traffic-eng router-id Loopback0
mpls traffic-eng area 0
mpls traffic-eng mesh-group 10 Loopback0 area 0
router rip
address-family ipv4 vrf MSSK
redistribute bgp 1 metric 2
network 192.168.67.0
no auto-summary
version 2
exit-address-family
router bgp 1
bgp log-neighbor-changes
no bgp default ipv4-unicast
neighbor 2.2.2.2 remote-as 1
neighbor 2.2.2.2 update-source Loopback0
address-family vpnv4
neighbor 2.2.2.2 activate
neighbor 2.2.2.2 send-community both
exit-address-family
address-family ipv4 vrf MSSK
redistribute rip
exit-address-family
interface Auto-Template1
ip unnumbered Loopback0
tunnel mode mpls traffic-eng
tunnel destination mesh-group 10
tunnel mpls traffic-eng autoroute announce
tunnel mpls traffic-eng path-option 10 dynamic
R7:
interface Loopback0
ip address 7.7.7.7 255.255.255.255
interface FastEthernet1/0
ip address 192.168.67.7 255.255.255.0
speed 100
duplex full
router rip
version 2
network 7.0.0.0
network 192.168.67.0
no auto-summary
Verification:
Let us check CE1 routing table and test connectivity to CE2:
R1#sh ip route rip
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, l - LISP
+ - replicated route, % - next hop override
Gateway of last resort is not set
7.0.0.0/32 is subnetted, 1 subnets
R 7.7.7.7 [120/2] via 192.168.12.2, 00:00:16, FastEthernet1/0
R 192.168.67.0/24 [120/2] via 192.168.12.2, 00:00:16, FastEthernet1/0
R1#ping 7.7.7.7 source loopback 0
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 7.7.7.7, timeout is 2 seconds:
Packet sent with a source address of 1.1.1.1
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 76/88/104 ms
R1#traceroute 7.7.7.7 source lo0 numeric
Type escape sequence to abort.
Tracing the route to 7.7.7.7
VRF info: (vrf in name/id, vrf out name/id)
1 192.168.12.2 56 msec 72 msec 68 msec
2 192.168.23.3 [MPLS: Labels 18/17 Exp 0] 76 msec 52 msec 76 msec
3 192.168.67.6 [MPLS: Label 17 Exp 0] 116 msec 124 msec 88 msec
4 192.168.67.7 116 msec 152 msec 136 msec
R2#show mpls traffic-eng topology brief
My_System_id: 2.2.2.2 (ospf 1 area 0)
Signalling error holddown: 10 sec Global Link Generation 18
IGP Id: 2.2.2.2, MPLS TE Id:2.2.2.2 Router Node (ospf 1 area 0)
link[0]: Broadcast, DR: 192.168.23.2, nbr_node_id:1, gen:8
frag_id: 2, Intf Address: 192.168.23.2
TE metric: 1, IGP metric: 1, attribute flags: 0x0
SRLGs: None
link[1]: Broadcast, DR: 192.168.24.2, nbr_node_id:2, gen:8
frag_id: 3, Intf Address: 192.168.24.2
TE metric: 1, IGP metric: 1, attribute flags: 0x0
SRLGs: None
IGP Id: 3.3.3.3, MPLS TE Id:3.3.3.3 Router Node (ospf 1 area 0)
Area mg-id's:
: mg-id 10 3.3.3.3 :
link[0]: Broadcast, DR: 192.168.23.2, nbr_node_id:1, gen:11
frag_id: 2, Intf Address: 192.168.23.3
TE metric: 1, IGP metric: 1, attribute flags: 0x0
SRLGs: None
link[1]: Broadcast, DR: 192.168.36.6, nbr_node_id:4, gen:11
frag_id: 3, Intf Address: 192.168.36.3
TE metric: 1, IGP metric: 1, attribute flags: 0x0
SRLGs: None
link[2]: Broadcast, DR: 192.168.35.3, nbr_node_id:3, gen:11
frag_id: 4, Intf Address: 192.168.35.3
TE metric: 1, IGP metric: 1, attribute flags: 0x0
SRLGs: None
IGP Id: 4.4.4.4, MPLS TE Id:4.4.4.4 Router Node (ospf 1 area 0)
Area mg-id's:
: mg-id 10 4.4.4.4 :
link[0]: Broadcast, DR: 192.168.24.2, nbr_node_id:2, gen:13
frag_id: 2, Intf Address: 192.168.24.4
TE metric: 1, IGP metric: 1, attribute flags: 0x0
SRLGs: None
link[1]: Broadcast, DR: 192.168.45.4, nbr_node_id:5, gen:13
frag_id: 3, Intf Address: 192.168.45.4
TE metric: 1, IGP metric: 1, attribute flags: 0x0
SRLGs: None
IGP Id: 5.5.5.5, MPLS TE Id:5.5.5.5 Router Node (ospf 1 area 0)
Area mg-id's:
: mg-id 10 5.5.5.5 :
link[0]: Broadcast, DR: 192.168.56.6, nbr_node_id:6, gen:16
frag_id: 2, Intf Address: 192.168.56.5
TE metric: 1, IGP metric: 1, attribute flags: 0x0
SRLGs: None
link[1]: Broadcast, DR: 192.168.45.4, nbr_node_id:5, gen:16
frag_id: 3, Intf Address: 192.168.45.5
TE metric: 1, IGP metric: 1, attribute flags: 0x0
SRLGs: None
link[2]: Broadcast, DR: 192.168.35.3, nbr_node_id:3, gen:16
frag_id: 4, Intf Address: 192.168.35.5
TE metric: 1, IGP metric: 1, attribute flags: 0x0
SRLGs: None
IGP Id: 6.6.6.6, MPLS TE Id:6.6.6.6 Router Node (ospf 1 area 0)
Area mg-id's:
: mg-id 10 6.6.6.6 :
link[0]: Broadcast, DR: 192.168.36.6, nbr_node_id:4, gen:18
frag_id: 2, Intf Address: 192.168.36.6
TE metric: 1, IGP metric: 1, attribute flags: 0x0
SRLGs: None
link[1]: Broadcast, DR: 192.168.56.6, nbr_node_id:6, gen:18
frag_id: 3, Intf Address: 192.168.56.6
TE metric: 1, IGP metric: 1, attribute flags: 0x0
SRLGs: None
IGP Id: 192.168.23.2, Network Node (ospf 1 area 0)
link[0]: Broadcast, Nbr IGP Id: 2.2.2.2, nbr_node_id:7, gen:1
link[1]: Broadcast, Nbr IGP Id: 3.3.3.3, nbr_node_id:8, gen:1
IGP Id: 192.168.24.2, Network Node (ospf 1 area 0)
link[0]: Broadcast, Nbr IGP Id: 2.2.2.2, nbr_node_id:7, gen:2
link[1]: Broadcast, Nbr IGP Id: 4.4.4.4, nbr_node_id:9, gen:2
IGP Id: 192.168.35.3, Network Node (ospf 1 area 0)
link[0]: Broadcast, Nbr IGP Id: 3.3.3.3, nbr_node_id:8, gen:3
link[1]: Broadcast, Nbr IGP Id: 5.5.5.5, nbr_node_id:10, gen:3
IGP Id: 192.168.36.6, Network Node (ospf 1 area 0)
link[0]: Broadcast, Nbr IGP Id: 6.6.6.6, nbr_node_id:11, gen:4
link[1]: Broadcast, Nbr IGP Id: 3.3.3.3, nbr_node_id:8, gen:4
IGP Id: 192.168.45.4, Network Node (ospf 1 area 0)
link[0]: Broadcast, Nbr IGP Id: 4.4.4.4, nbr_node_id:9, gen:5
link[1]: Broadcast, Nbr IGP Id: 5.5.5.5, nbr_node_id:10, gen:5
IGP Id: 192.168.56.6, Network Node (ospf 1 area 0)
link[0]: Broadcast, Nbr IGP Id: 6.6.6.6, nbr_node_id:11, gen:6
link[1]: Broadcast, Nbr IGP Id: 5.5.5.5, nbr_node_id:10, gen:6
R2# sh ip int bri | ex down
Interface IP-Address OK? Method Status Protocol
FastEthernet1/0 192.168.23.2 YES manual up up
FastEthernet1/1 192.168.24.2 YES manual up up
FastEthernet2/0 192.168.12.2 YES manual up up
Auto-Template1 2.2.2.2 YES TFTP up up
Loopback0 2.2.2.2 YES manual up up
Tunnel64336 2.2.2.2 YES TFTP up up
Tunnel64337 2.2.2.2 YES TFTP up up
Tunnel64338 2.2.2.2 YES TFTP up up
Tunnel64339 2.2.2.2 YES TFTP up up
R2#show mpls forwarding-table
Local Outgoing Prefix Bytes Label Outgoing Next Hop
Label Label or Tunnel Id Switched interface
16 No Label 192.168.12.0/24[V] \
0 aggregate/MSSK
17 No Label 1.1.1.1/32[V] 3768 Fa2/0 192.168.12.1
R3#show mpls forwarding-table
Local Outgoing Prefix Bytes Label Outgoing Next Hop
Label Label or Tunnel Id Switched interface
16 Pop Label 2.2.2.2 64338 [7768] \
0 Fa2/0 192.168.35.5
17 Pop Label 6.6.6.6 64336 [2762] \
6801 Fa1/0 192.168.23.2
18 Pop Label 2.2.2.2 64339 [3399] \
4961 Fa1/1 192.168.36.6
R2#show ip route | inc Tunnel
O 3.3.3.3 [110/2] via 3.3.3.3, 00:19:55, Tunnel64336
O 4.4.4.4 [110/2] via 4.4.4.4, 00:19:55, Tunnel64337
O 5.5.5.5 [110/3] via 5.5.5.5, 00:19:45, Tunnel64338
O 6.6.6.6 [110/3] via 6.6.6.6, 00:19:45, Tunnel64339
O 192.168.35.0/24 [110/2] via 3.3.3.3, 00:19:55, Tunnel64336
O 192.168.36.0/24 [110/2] via 3.3.3.3, 00:19:55, Tunnel64336
O 192.168.45.0/24 [110/2] via 4.4.4.4, 00:19:55, Tunnel64337
O 192.168.56.0/24 [110/3] via 6.6.6.6, 00:19:45, Tunnel64339
[110/3] via 5.5.5.5, 00:19:45, Tunnel64338
R2#show mpls traffic-eng auto-tunnel mesh
Auto-Template1:
Using mesh-group 10 to clone the following tunnel interfaces:
Destination Interface
----------- ---------
3.3.3.3 Tunnel64336
4.4.4.4 Tunnel64337
5.5.5.5 Tunnel64338
6.6.6.6 Tunnel64339
Mesh tunnel interface numbers: min 64336 max 65335
R6#show mpls traffic-eng auto-tunnel mesh
Auto-Template1:
Using mesh-group 10 to clone the following tunnel interfaces:
Destination Interface
----------- ---------
2.2.2.2 Tunnel64336
3.3.3.3 Tunnel64337
4.4.4.4 Tunnel64338
5.5.5.5 Tunnel64339
Mesh tunnel interface numbers: min 64336 max 65335
If we checked the OSPF database for one of the PE routers (we are using two , one for the MPLS TE and one for the mesh-group)
LS age: 1695
Options: (No TOS-capability, DC)
LS Type: Opaque Area Link
Link State ID: 4.0.0.0
Opaque Type: 4
Opaque ID: 0
Advertising Router: 2.2.2.2
LS Seq Number: 80000001
Checksum: 0xE129
Length: 32
Capability Type: Mesh-group
Length: 8
Value:
0000 000A 0202 0202
LS age: 1686
Options: (No TOS-capability, DC)
LS Type: Opaque Area Link
Link State ID: 4.0.0.0
Opaque Type: 4
Opaque ID: 0
Advertising Router: 3.3.3.3
LS Seq Number: 80000001
Checksum: 0xF50D
Length: 32
Capability Type: Mesh-group
Length: 8
Value:
0000 000A 0303 0303
LS age: 1681
Options: (No TOS-capability, DC)
LS Type: Opaque Area Link
Link State ID: 4.0.0.0
Opaque Type: 4
Opaque ID: 0
Advertising Router: 4.4.4.4
LS Seq Number: 80000001
Checksum: 0xAF0
Length: 32
Capability Type: Mesh-group
Length: 8
Value:
0000 000A 0404 0404
LS age: 1678
Options: (No TOS-capability, DC)
LS Type: Opaque Area Link
Link State ID: 4.0.0.0
Opaque Type: 4
Opaque ID: 0
Advertising Router: 5.5.5.5
LS Seq Number: 80000001
Checksum: 0x1ED4
Length: 32
Capability Type: Mesh-group
Length: 8
Value:
0000 000A 0505 0505
LS age: 1661
Options: (No TOS-capability, DC)
LS Type: Opaque Area Link
Link State ID: 4.0.0.0
Opaque Type: 4
Opaque ID: 0
Advertising Router: 6.6.6.6
LS Seq Number: 80000001
Checksum: 0x32B8
Length: 32
Capability Type: Mesh-group
Length: 8
Value:
0000 000A 0606 0606
As can be seen the 0000 000A refers to the TLV which when decoded back to decimal equals to 10 (which is the mesh group number configured in the command mpls traffic-eng mesh-group 10 Loopback0 area 0 under the OSPF process)
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