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MPLS VPN 配置步聚

2014-11-29 23:22 浏览:

  CE与PE之间跑OSPF为例

  1、配置IGP(OSPF)

  show ip ospf neighbor

  show ip route ospf

  2、配置MPLS

  可以配置mpls的标签范围

  mpls label range xx-xx

  默认是ldp协议

  接口下启用mpls

  int fa0/0

  mpls ip

  查看邻居

  show mpls ldp discovery

  show mpls ldp neighbor

  show mpls forwarding-table\\查看标签分配情况

  3、配置MP-BGP

  1)PE之间配置BGP VPNV4邻居关系

  R1:

  router bgp 100

  no bgp default ipv4-unicast

  neighbor 3.3.3.3 remote-as 100

  neighbor 3.3.3.3 update-source Loopback0

  !

  address-family vpnv4

  neighbor 3.3.3.3 activate

  neighbor 3.3.3.3 send-community extended

  R3:

  router bgp 100

  bgp log-neighbor-changes

  no bgp default ipv4-unicast

  neighbor 1.1.1.1 remote-as 100

  neighbor 1.1.1.1 update-source Loopback0

  !

  address-family vpnv4

  neighbor 1.1.1.1 activate

  neighbor 1.1.1.1 send-community extended

  4、配置VRF应用至接口

  R1:

  ip vrf Mao

  rd 100:10

  route-target export 100:11

  route-target import 100:10

  ip vrf Ting

  rd 100:11

  route-target export 100:13 //表示输出的路由打上100:13标记

  route-target import 100:14 //将标记为100:14的路由加入VRF路由表中

  interface FastEthernet0/0

  ip vrf forwarding Mao

  ip address 14.1.1.1 255.255.255.252

  interface FastEthernet0/1

  ip vrf forwarding Ting

  ip address 15.1.1.1 255.255.255.252

  R3:

  ip vrf Mao

  rd 100:10

  route-target export 100:10

  route-target import 100:11

  !

  ip vrf Ting

  rd 100:11

  route-target export 100:14

  route-target import 100:13

  interface FastEthernet0/1

  ip vrf forwarding Mao

  ip address 36.1.1.1 255.255.255.252

  !

  interface FastEthernet1/0

  ip vrf forwarding Ting

  ip address 37.1.1.1 255.255.255.252

  查看VRF基本情况Show ip vrf detail

  R1#show ip vrf detail

  VRF Mao (VRF Id = 1); default RD 100:10; default VPNID

  Interfaces:

  Fa0/0

  VRF Table ID = 1

  Export VPN route-target communities

  RT:100:10

  Import VPN route-target communities

  RT:100:11

  No import route-map

  No global export route-map

  No export route-map

  VRF label distribution protocol: not configured

  VRF label allocation mode: per-prefix

  VRF Ting (VRF Id = 2); default RD 100:11; default VPNID

  Interfaces:

  Fa0/1

  VRF Table ID = 2

  Export VPN route-target communities

  RT:100:14

  Import VPN route-target communities

  RT:100:13

  No import route-map

  No global export route-map

  No export route-map

  VRF label distribution protocol: not configured

  VRF label allocation mode: per-prefix

  5、CE和PE之间配置路由协议

  CE-R4:

  router ospf 10

  router-id 4.4.4.4

  network 4.4.4.4 0.0.0.0 area 1

  network 14.1.1.0 0.0.0.3 area 1

  PE-R1:

  router ospf 10 vrf Mao

  network 14.1.1.0 0.0.0.3 area 1

  PE-R3:

  router ospf 2 vrf Mao

  network 36.1.1.0 0.0.0.3 area 2

  CE-R6:

  router ospf 2

  router-id 6.6.6.6

  network 6.6.6.6 0.0.0.0 area 2

  network 36.1.1.0 0.0.0.3 area 2

  show ip route vrf Mao 查看VRF Mao路由

  Routing Table: Mao

  Gateway of last resort is not set

  6.0.0.0/32 is subnetted, 1 subnets

  O 6.6.6.6 [110/2] via 36.1.1.2, 00:12:43, FastEthernet0/1

  36.0.0.0/8 is variably subnetted, 2 subnets, 2 masks

  C 36.1.1.0/30 is directly connected, FastEthernet0/1

  L 36.1.1.1/32 is directly connected, FastEthernet0/1

  6、CE客户路由与MP-BGP之间重分布

  PE-R1:

  router ospf 10 vrf Mao

  redistribute bgp 100 subnets

  network 14.1.1.0 0.0.0.3 area 1

  router bgp 100

  address-family ipv4 vrf Mao

  redistribute ospf 10

  PE-R3:

  router ospf 2 vrf Mao

  redistribute bgp 100 subnets

  network 36.1.1.0 0.0.0.3 area 2

  router bgp 100

  address-family ipv4 vrf Mao

  redistribute ospf 2

  exit-address-family

  查看bgp VPNV4路由

  Show ip bgp vpnv4 all

  扩展知识:

  R1#show ip bgp vpnv4 all 4.4.4.4

  BGP routing table entry for 100:10:4.4.4.4/32, version 2

  Paths: (1 available, best #1, table Mao)

  Advertised to update-groups:

  1

  Refresh Epoch 1

  Local

  14.1.1.2 from 0.0.0.0 (1.1.1.1)

  Origin incomplete, metric 2, localpref 100, weight 32768, valid, sourced, best

  Extended Community: RT:100:10 OSPF DOMAIN ID:0x0005:0x0000000A0200

  OSPF RT:0.0.0.1:2:0 OSPF ROUTER ID:14.1.1.1:0

  mpls labels in/out 103/nolabel //表示MP-BGP给4.4.4.4分配的内层标签;

  rx pathid: 0, tx pathid: 0x0

  RT:0.0.0.1:2:0 0.0.0.1表示区域,2表示OSPF LSA类型(一般为1LSA或者2LAS),区域间路由,如果是3表示ospf 3 LAS,如果是5则表

  R1#show ip bgp vpnv4 all 77.1.1.1

  BGP routing table entry for 100:11:77.1.1.1/32, version 24

  Paths: (1 available, best #1, table Ting)

  Not advertised to any peer

  Refresh Epoch 1

  Local

  3.3.3.3 (metric 3) from 3.3.3.3 (3.3.3.3)

  Origin incomplete, metric 20, localpref 100, valid, internal, best

  Extended Community: RT:100:13 OSPF DOMAIN ID:0x0005:0x0000000C0200

  OSPF RT:0.0.0.0:5:1 OSPF ROUTER ID:37.1.1.1:0

  mpls labels in/out nolabel/310

  // 如果RT:0.0.0.0:5:1 5表示为OSPF LSA 5

  总结: CE端路由重分布至MP-BGP时,能够承载OSPF属性值。