MPLS基础

 

本实验模拟BGP路由黑洞环境，使用MPLS LDP解决路由黑洞。
完成以下需求：
1.设备IP地址已配置，请测试直连。

2.AS200内配置OSPF，进程1，RID手动设置为Lo0地址，区域0，network通告接口使用通配符0.0.0.0
不宣告与其他AS互联接口。

3.建立BGP邻居关系
3.1 R2/4使用Lo0建立ibgp邻居。
3.2 R1/2，R4/5分别使用物理口建立ebgp邻居。
3.3 R1宣告1.1.1.1/32，R5宣告5.5.5.5/32，起源属性为“i”。

4.配置MPLS LDP
AS200为MPLS域，在R2/3/4上配置LDP。
4.1 LSR-ID为Lo0地址。
4.2 R2/3，R3/4分别建立LDP邻居关系，并自动分发标签。
4.3 R2/4上配置以下命令，使得BGP路由可以“借用”下一跳地址的标签。
route recursive-lookup tunnel
4.4 测试1.1.1.1访问5.5.5.5，并查看R2/3/4的LSP。
display mpls lsp

R1配置

router id 1.1.1.1 
interface GigabitEthernet0/0/0
 ip address 12.1.1.1 255.255.255.0 

interface LoopBack0
 ip address 1.1.1.1 255.255.255.255 
#
bgp 100
 peer 12.1.1.2 as-number 200 
 #
 ipv4-family unicast
  undo synchronization
  network 1.1.1.1 255.255.255.255 
  peer 12.1.1.2 enable

R2配置

router id 2.2.2.2 
mpls lsr-id 2.2.2.2
mpls
#
mpls ldp
#
interface GigabitEthernet0/0/0
 ip address 12.1.1.2 255.255.255.0 
#
interface GigabitEthernet0/0/1
 ip address 23.1.1.2 255.255.255.0 
 mpls
 mpls ldp
interface LoopBack0
 ip address 2.2.2.2 255.255.255.255 
#
bgp 200
 peer 4.4.4.4 as-number 200 
 peer 4.4.4.4 connect-interface LoopBack0
 peer 12.1.1.1 as-number 100 
 #
 ipv4-family unicast
  undo synchronization
  peer 4.4.4.4 enable
  peer 4.4.4.4 next-hop-local 
  peer 12.1.1.1 enable
#
ospf 1 router-id 2.2.2.2 
 area 0.0.0.0 
  network 2.2.2.2 0.0.0.0 
  network 23.1.1.2 0.0.0.0 
#
route recursive-lookup tunnel

R3配置

router id 3.3.3.3 
mpls lsr-id 3.3.3.3
mpls
#
mpls ldp
interface GigabitEthernet0/0/0
 ip address 23.1.1.3 255.255.255.0 
 mpls
 mpls ldp
#
interface GigabitEthernet0/0/1
 ip address 34.1.1.3 255.255.255.0 
 mpls
 mpls ldp
interface LoopBack0
 ip address 3.3.3.3 255.255.255.255 
#
ospf 1 router-id 3.3.3.3 
 area 0.0.0.0 
  network 3.3.3.3 0.0.0.0 
  network 23.1.1.3 0.0.0.0 
  network 34.1.1.3 0.0.0.0 

R4配置

router id 4.4.4.4 
mpls lsr-id 4.4.4.4
mpls
#
mpls ldp
interface GigabitEthernet0/0/0
 ip address 34.1.1.4 255.255.255.0 
 mpls
 mpls ldp
#
interface GigabitEthernet0/0/1
 ip address 45.1.1.4 255.255.255.0 
interface LoopBack0
 ip address 4.4.4.4 255.255.255.255 
#
bgp 200
 peer 2.2.2.2 as-number 200 
 peer 2.2.2.2 connect-interface LoopBack0
 peer 45.1.1.5 as-number 300 
 #
 ipv4-family unicast
  undo synchronization
  peer 2.2.2.2 enable
  peer 2.2.2.2 next-hop-local 
  peer 45.1.1.5 enable
#
ospf 1 router-id 4.4.4.4 
 area 0.0.0.0 
  network 4.4.4.4 0.0.0.0 
  network 34.1.1.4 0.0.0.0 
#
route recursive-lookup tunnel

R5配置

router id 5.5.5.5 
interface GigabitEthernet0/0/0
 ip address 45.1.1.5 255.255.255.0 

interface LoopBack0
 ip address 5.5.5.5 255.255.255.255 
#
bgp 300
 peer 45.1.1.4 as-number 200 
 #
 ipv4-family unicast
  undo synchronization
  network 5.5.5.0 255.255.255.0 
  network 5.5.5.5 255.255.255.255 
  peer 45.1.1.4 enable

测试 

<R1>ping -a 1.1.1.1 5.5.5.5
  PING 5.5.5.5: 56  data bytes, press CTRL_C to break
    Reply from 5.5.5.5: bytes=56 Sequence=1 ttl=252 time=60 ms
    Reply from 5.5.5.5: bytes=56 Sequence=2 ttl=252 time=40 ms
    Reply from 5.5.5.5: bytes=56 Sequence=3 ttl=252 time=50 ms
    Reply from 5.5.5.5: bytes=56 Sequence=4 ttl=252 time=30 ms
    Reply from 5.5.5.5: bytes=56 Sequence=5 ttl=252 time=50 ms

  --- 5.5.5.5 ping statistics ---
    5 packet(s) transmitted
    5 packet(s) received
    0.00% packet loss
    round-trip min/avg/max = 30/46/60 ms