Shulou(Shulou.com)06/01 Report--

The Ip address is shown in the figure above, and Loopback 0 is x.x.x.x/32 R1/R5 and CE respectively. R2/R3/R4 is ISP:R2/R4, PE,R3 is P.

Step 1. ISP runs the IGP (ISIS) protocol internally

R2:

Router isis

Net 24.0234.0000.0000.0002.00

Interface Serial1/1

Ip router isis

Interface Loopback0

Ip router isis

R3:

Router isis

Net 24.0234.0000.0000.0003.00

Interface Serial1/1

Ip router isis

Nterface Serial1/0

Ip router isis

Interface Loopback0

Ip router isis

R4:

Router isis

Net 24.0234.0000.0000.0004.00

Interface Serial1/0

Ip router isis

Interface Loopback0

Ip router isis

After configuration, check the establishment of neighbor relationship:

R3# sh clns neighbors

System Id Interface SNPA State Holdtime Type Protocol

R4 Se1/1 * HDLC* Up 29 L1L2 IS-IS

R2 Se1/0 * HDLC* Up 27 L1L2 IS-IS

Show ip route on R2/R4 to see if routing has been learned

R2#sh ip route

34.0.0.0/24 is subnetted, 1 subnets

I L1 34.0.0.0 [115/20] via 23.0.0.3, Serial1/1

2.0.0.0/32 is subnetted, 1 subnets

C 2.2.2.2 is directly connected, Loopback0

3.0.0.0/32 is subnetted, 1 subnets

I L1 3.3.3.3 [115/20] via 23.0.0.3, Serial1/1

4.0.0.0/32 is subnetted, 1 subnets

I L1 4.4.4.4 [115/30] via 23.0.0.3, Serial1/1

23.0.0.0/24 is subnetted, 1 subnets

C 23.0.0.0 is directly connected, Serial1/1

Step 2. Implement MPLS internally in ISP

R2:

Mpls label range 200 300

Mpls ldp route-id lo 0

Int s 1/1

Mpls ip

R3:

Mpls label range 300 400

Mpls ldp route-id lo 0

Int s 1/1

Mpls ip

Int s 1/0

Mpls ip

R4:

Mpls label range 400 500

Mpls ldp route-id lo 0

Int s 1/0

Mpls ip

Then view the establishment of LDP neighbors on R3:

R3#sh mpls ldp neighbor

Peer LDP Ident: 2.2.2.2 0; Local LDP Ident 3.3.3.3 VR 0

TCP connection: 2.2.2.2.646-3.3.3.3.33300

State: Oper; Msgs sent/rcvd: 34max 37; Downstream

Up time: 00:23:03

LDP discovery sources:

Serial1/0, Src IP addr: 23.0.0.2

Addresses bound to peer LDP Ident:

23.0.0.2 2.2.2.2

Peer LDP Ident: 4.4.4.4 0; Local LDP Ident 3.3.3.3VR 0

TCP connection: 4.4.4.32962-3.3.3.3.646

State: Oper; Msgs sent/rcvd: 25Universe 28; Downstream

Up time: 00:14:27

LDP discovery sources:

Serial1/1, Src IP addr: 34.0.0.4

Addresses bound to peer LDP Ident:

34.0.0.4 4.4.4.4

The LDP neighbor establishment is complete.

Step 3. Establish a MBPG- × × relationship between R2 and R4 (between PE) in ISP

R2:

Router bgp 1

No au is turned off by default

No syn is turned off by default

No bgp default ipv4-unicast

Bgp log-neighbor-changes

Neighbor 4.4.4.4 remote-as 1

Neighbor 4.4.4.4 update-source Loopback0

!

Address-family * * v4

Neighbor 4.4.4.4 activate

Neighbor 4.4.4.4 send-community extended

Exit-address-family

R4:

Router bgp 1

No au

No syn

No bgp default ipv4-unicast

Bgp log-neighbor-changes

Neighbor 2.2.2.2 remote-as 1

Neighbor 2.2.2.2 update-source Loopback0

!

Address-family * * v4

Neighbor 2.2.2.2 activate

Neighbor 2.2.2.2 send-community extended

Exit-address-family

Check that the neighbor is established successfully:

Ringing sh ip bg * all summary

Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd

2.2.2.2 4 1 35 33 9 00 00:25:47 2

Ringing sh ip bg * all su

Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd

4.4.4.4 4 1 34 36 9 00 00:26:14 2

Step 4. Import and export of VRF

R2/R4

Create VRF

Ip vrf OSPF

Rd 1:100

Route-target export 1:100

Route-target import 1:100

Enable VRF under the API

R2 interface Serial1/0

I p vrf forwarding OSPF

R4 interface Serial1/1

Ip vrf forwarding OSPF

Ospf routing protocol is used between PE-CE

R1:

Router ospf 1

Router-id 1.1.1.1

Log-adjacency-changes

Network 1.1.1.1 0.0.0.0 area 0

Network 12.0.0.1 0.0.0.0 area 0

R2:

Router ospf 1 vrf OSPF

Log-adjacency-changes

Network 12.0.0.2 0.0.0.0 area 0

R5:

Router ospf 1

Router-id 5.5.5.5

Log-adjacency-changes

Network 5.5.5.5 0.0.0.0 area 0

Network 45.0.0.5 0.0.0.0 area 0

R4

Router ospf 1 vrf OSPF

Log-adjacency-changes

Network 45.0.0.4 0.0.0.0 area 0

R2/R4 VRF and BGP routes are redistributed to each other

R2/R4

Router ospf 1 vrf OSPF

Redistribute bgp 1 subnets

Router bgp 1

Address-family ipv4 vrf OSPF

Redistribute ospf 1 vrf OSPF match internal external 1 external 2

No synchronization

Exit-address-family

Check on R2/R4 to see if VRF routing is learned

R2#sh ip bg * all

Network Next Hop Metric LocPrf Weight Path

Route Distinguisher: 1:1 (default for vrf RIP)

* > 1.1.1.1 Compact 32 12.0.0.1 1 32768?

* > i5.5.5.5Compact 32 4.4.4.4 1 100 0?

* > 12.0.0.0Compact 24 0.0.0.0 32768?

* > i45.0.0.0Compact 24 4.4.4.4 0 100 0?

Check to see if R1/R5 routing has learned:

R1# sh ip route

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 [110/129] via 12.0.0.2, 00:11:14, Serial1/1

12.0.0.0/24 is subnetted, 1 subnets

C 12.0.0.0 is directly connected, Serial1/1

45.0.0.0/24 is subnetted, 1 subnets

O IA 45.0.0.0 [110/65] via 12.0.0.2, 00:11:14, Serial1/1

Step 5. Test MPLS to check the tag conversion in the forwarding process.

View from R1-R5 in one direction:

R1#traceroute 5.5.5.5

Type escape sequence to abort.

Tracing the route to 5.5.5.5

1 12.0.0.2 48 msec 48 msec 32 msec

2 23.0.0.3 [MPLS: Labels 301/403 Exp 0] 112 msec 120 msec 160 msec

3 45.0.0.4 [MPLS: Label 403 Exp 0] 108 msec 120 msec 108 msec

4 45.0.0.5 128 msec * 104 msec

R2#sh ip cef vrf OSPF detail

5.5.5.5/32, version 9, epoch 0, cached adjacency to Serial1/1

0 packets, 0 bytes

Tag information set

Local tag: × × ×-route-head

Fast tag rewrite with Se1/1, point2point, tags imposed: {301 403}

Via 4.4.4.4, 0 dependencies, recursive

Next hop 23.0.0.3, Serial1/1 via 4.4.4.4/32

Valid cached adjacency

Tag rewrite with Se1/1, point2point, tags imposed: {301 403}

R3#sh mpls forwarding-table

Local Outgoing Prefix Bytes tag Outgoing Next Hop

Tag tag or VC or Tunnel Id switched interface

301 Pop tag 4.4.4.4/32 4760 Se1/1 point2point

R4#sh ip cef vrf OSPF detail

5.5.5.5/32, version 10, epoch 0, cached adjacency to Serial1/1

0 packets, 0 bytes

Tag information set

Local tag: 403

Via 45.0.0.5, Serial1/1, 0 dependencies

Next hop 45.0.0.5, Serial1/1

Valid cached adjacency

Tag rewrite with Se1/1, point2point, tags imposed: {}

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