组网需求

如图1，CE1和CE2属于同一个VPLS，分别通过AS100内的PE1和AS200内的PE2接入骨干网。

当每个AS内有大量的跨域VPLS时，可以配置采用OptionC方式跨域BGP VPLS。在OptionC方式跨域BGP VPLS中，ASBR上不再维护VPLS标签块信息，而是PE之间直接交换VPLS标签块信息。

配置思路

在骨干网上运行IGP协议，使同一个AS域内的各设备能互通。
在骨干网上使能MPLS，在PE与ASBR之间建立动态LSP隧道，并且在ASBR之间的接口上也要使能MPLS。
同一AS的PE和ASBR之间建立IBGP。
在各ASBR之间配置EBGP，在ASBR上需配置路由策略，使能标签路由功能。在PE1和PE2之间建立MP-EBGP对等体关系。
在PE1和PE2之间创建VSI实例，接入CE。

操作步骤

1.配置各设备接口的IP地址

# 配置CE1。

<HUAWEI> system-view
[~HUAWEI] sysname CE1
[*HUAWEI] commit
[~CE1] interface gigabitethernet 1/0/0
[*CE1-GigabitEthernet1/0/0] undo shutdown
[*CE1-GigabitEthernet1/0/0] quit
[*CE1] interface gigabitethernet 1/0/0.1
[*CE1-GigabitEthernet1/0/0.1] ip address 10.1.1.1 24
[*CE1-GigabitEthernet1/0/0.1] quit
[*CE1] commit

# 配置PE1。

<HUAWEI> system-view
[~HUAWEI] sysname PE1
[*HUAWEI] commit
[~PE1] interface loopback1
[*PE1-Loopback1] ip address 1.1.1.1 32
[*PE1-Loopback1] quit
[*PE1] interface gigabitethernet 1/0/0
[*PE1-GigabitEthernet1/0/0] undo shutdown
[*PE1-GigabitEthernet1/0/0] quit
[*PE1] interface gigabitethernet 1/0/0.1
[*PE1-GigabitEthernet1/0/0.1] quit
[*PE1] interface gigabitethernet 2/0/0
[*PE1-GigabitEthernet2/0/0] undo shutdown
[*PE1-GigabitEthernet2/0/0] ip address 10.10.1.1 24
[*PE1-GigabitEthernet2/0/0] quit
[*PE1] commit

# 配置ASBR1。

<HUAWEI> system-view
[~HUAWEI] sysname ASBR1
[*HUAWEI] commit
[~ASBR1] interface loopback1
[*ASBR1-Loopback1] ip address 2.2.2.2 32
[*ASBR1-Loopback1] quit
[*ASBR1] interface gigabitethernet 1/0/0
[*ASBR1-GigabitEthernet1/0/0] undo shutdown
[*ASBR1-GigabitEthernet1/0/0] ip address 10.10.1.2 24
[*ASBR1-GigabitEthernet1/0/0] quit
[*ASBR1] interface gigabitethernet 2/0/0
[*ASBR1-GigabitEthernet2/0/0] undo shutdown
[*ASBR1-GigabitEthernet2/0/0] ip address 10.20.1.1 24
[*ASBR1-GigabitEthernet2/0/0] quit
[*ASBR1] commit

# 配置ASBR2。

<HUAWEI> system-view
[~HUAWEI] sysname ASBR2
[*HUAWEI] commit
[~ASBR2] interface loopback1
[*ASBR2-Loopback1] ip address 3.3.3.3 32
[*ASBR2-Loopback1] quit
[*ASBR2] interface gigabitethernet 1/0/0
[*ASBR2-GigabitEthernet1/0/0] undo shutdown
[*ASBR2-GigabitEthernet1/0/0] ip address 10.20.1.2 24
[*ASBR2-GigabitEthernet1/0/0] quit
[*ASBR2] interface gigabitethernet 2/0/0
[*ASBR2-GigabitEthernet2/0/0] undo shutdown
[*ASBR2-GigabitEthernet2/0/0] ip address 10.30.1.1 24
[*ASBR2-GigabitEthernet2/0/0] quit
[*ASBR2] commit

# 配置PE2。

<HUAWEI> system-view
[~HUAWEI] sysname PE2
[*HUAWEI] commit
[~PE2] interface loopback1
[*PE2-Loopback1] ip address 4.4.4.4 32
[*PE2-Loopback1] quit
[*PE2] interface gigabitethernet 1/0/0
[*PE2-GigabitEthernet1/0/0] undo shutdown
[*PE2-GigabitEthernet1/0/0] ip address 10.30.1.1 24
[*PE2-GigabitEthernet1/0/0] quit
[*PE2] interface gigabitethernet 2/0/0
[*PE2-GigabitEthernet2/0/0] undo shutdown
[*PE2-GigabitEthernet2/0/0] quit
[*PE2] interface gigabitethernet 2/0/0.1
[*PE2-GigabitEthernet2/0/0.1] quit
[*PE2] commit

# 配置CE2。

<HUAWEI> system-view
[~HUAWEI] sysname CE2
[*HUAWEI] commit
[~CE2] interface gigabitethernet 1/0/0
[*CE2-GigabitEthernet1/0/0] undo shutdown
[*CE2-GigabitEthernet1/0/0] quit
[*CE2] interface gigabitethernet 1/0/0.1
[*CE2-GigabitEthernet1/0/0.1] ip address 10.1.1.2 24
[*CE2-GigabitEthernet1/0/0.1] quit
[*CE2] commit

2.配置骨干网的IGP协议

# 配置PE1。

[~PE1] ospf 1
[*PE1-ospf-1] area 0.0.0.0
[*PE1-ospf-1-area-0.0.0.0] network 1.1.1.1 0.0.0.0
[*PE1-ospf-1-area-0.0.0.0] network 10.10.1.0 0.0.0.255
[*PE1-ospf-1-area-0.0.0.0] quit
[*PE1-ospf-1] quit
[*PE1] commit

# 配置ASBR1。

[~ASBR1] ospf 1
[*ASBR1-ospf-1] area 0.0.0.0
[*ASBR1-ospf-1-area-0.0.0.0] network 2.2.2.2 0.0.0.0
[*ASBR1-ospf-1-area-0.0.0.0] network 10.10.1.0 0.0.0.255
[*ASBR1-ospf-1-area-0.0.0.0] quit
[*ASBR1-ospf-1] quit
[*ASBR1] commit

# 配置ASBR2。

[*ASBR2] ospf 1
[*ASBR2-ospf-1] area 0.0.0.0
[*ASBR2-ospf-1-area-0.0.0.0] network 3.3.3.3 0.0.0.0
[*ASBR2-ospf-1-area-0.0.0.0] network 10.30.1.0 0.0.0.255
[*ASBR2-ospf-1-area-0.0.0.0] quit
[*ASBR2-ospf-1] quit
[*ASBR2] commit

# 配置PE2。

[~PE2] ospf 1
[*PE2-ospf-1] area 0.0.0.0
[*PE2-ospf-1-area-0.0.0.0] network 4.4.4.4 0.0.0.0
[*PE2-ospf-1-area-0.0.0.0] network 10.30.1.0 0.0.0.255
[*PE2-ospf-1-area-0.0.0.0] quit
[*PE2-ospf-1] quit
[*PE2] commit

3.使能MPLS，建立LSP隧道

# 配置PE1。

[~PE1] mpls lsr-id 1.1.1.1
[*PE1] mpls
[*PE1-mpls] quit
[*PE1] mpls ldp
[*PE1-mpls-ldp] quit
[*PE1] interface gigabitethernet 2/0/0
[*PE1-GigabitEthernet2/0/0] mpls
[*PE1-GigabitEthernet2/0/0] mpls ldp
[*PE1-GigabitEthernet2/0/0] quit
[*PE1] commit

# 配置ASBR1。

[*ASBR1] mpls lsr-id 2.2.2.2
[*ASBR1] mpls
[*ASBR1-mpls] quit
[*ASBR1] mpls ldp
[*ASBR1-mpls-ldp] quit
[*ASBR1] interface gigabitethernet 1/0/0
[*ASBR1-GigabitEthernet1/0/0] mpls
[*ASBR1-GigabitEthernet1/0/0] mpls ldp
[*ASBR1-GigabitEthernet1/0/0] quit
[*ASBR1] commit

# 配置ASBR2。

[~ASBR2] mpls lsr-id 3.3.3.3
[*ASBR2] mpls
[*ASBR2-mpls] quit
[*ASBR2] mpls ldp
[*ASBR2-mpls-ldp] quit
[*ASBR2] interface gigabitethernet 2/0/0
[*ASBR2-GigabitEthernet2/0/0] mpls
[*ASBR2-GigabitEthernet2/0/0] mpls ldp
[*ASBR2-GigabitEthernet2/0/0] quit
[*ASBR2] commit

# 配置PE2。

[~PE2] mpls lsr-id 4.4.4.4
[*PE2] mpls
[*PE2-mpls] quit
[*PE2] mpls ldp
[*PE2-mpls-ldp] quit
[*PE2] interface gigabitethernet 1/0/0
[*PE2-GigabitEthernet1/0/0] mpls
[*PE2-GigabitEthernet1/0/0] mpls ldp
[*PE2-GigabitEthernet1/0/0] quit
[*PE2] commit

4.在ASBR上使能域间的MPLS功能

# 配置ASBR1。

[~ASBR1] interface gigabitethernet 2/0/0
[*ASBR1-GigabitEthernet2/0/0] mpls
[*ASBR1-GigabitEthernet2/0/0-mpls] quit
[*ASBR1] commit

# 配置ASBR2。

[~ASBR2] interface gigabitethernet 1/0/0
[*ASBR2-GigabitEthernet1/0/0] mpls
[*ASBR2-GigabitEthernet1/0/0-mpls] quit
[*ASBR2] commit

5.在PE1与ASBR1之间、PE2与ASBR2之间配置IBGP对等体，在ASBR1与ASBR2之间配置EBGP对等体，并在ASBR上配置路由策略，对于从本AS的PE接收的路由，在向对端ASBR发布时，分配MPLS标签。对于向本AS的PE发布的路由，如果是带标签的IPv4路由，为其重新分配MPLS标签。

# 配置PE1。

[~PE1] bgp 100
[*PE1-bgp] peer 2.2.2.2 as-number 100
[*PE1-bgp] peer 2.2.2.2 label-route-capability
[*PE1-bgp] peer 2.2.2.2 connect-interface LoopBack 1
[*PE1-bgp] quit
[*PE1] commit

# 配置ASBR1。

[*ASBR1] route-policy policy1 permit node 1
[*ASBR1-route-policy] if-match mpls-label
[*ASBR1-route-policy] apply mpls-label
[*ASBR1-route-policy] quit
[*ASBR1] route-policy policy2 permit node 1
[*ASBR1-route-policy] apply mpls-label
[*ASBR1-route-policy] quit
[*ASBR1] bgp 100
[*ASBR1-bgp] network 1.1.1.1 255.255.255.255
[*ASBR1-bgp] peer 1.1.1.1 as-number 100
[*ASBR1-bgp] peer 1.1.1.1 route-policy policy1 export
[*ASBR1-bgp] peer 1.1.1.1 label-route-capability
[*ASBR1-bgp] peer 1.1.1.1 connect-interface loopback 1
[*ASBR1-bgp] peer 10.20.1.2 as-number 200
[*ASBR1-bgp] peer 10.20.1.2 route-policy policy2 export
[*ASBR1-bgp] peer 10.20.1.2 label-route-capability check-tunnel-reachable
[*ASBR1-bgp] peer 10.20.1.2 connect-interface gigabitethernet 2/0/0
[*ASBR1-bgp]quit
[*ASBR1]commit

# 配置ASBR2。

[*ASBR2] route-policy policy1 permit node 1
[*ASBR2-route-policy] if-match mpls-label
[*ASBR2-route-policy] apply mpls-label
[*ASBR2-route-policy] quit
[*ASBR2] route-policy policy2 permit node 1
[*ASBR2-route-policy] apply mpls-label
[*ASBR2-route-policy] quit
[*ASBR2] bgp 200
[*ASBR2-bgp] network 4.4.4.4 255.255.255.255
[*ASBR2-bgp] peer 4.4.4.4 as-number 200
[*ASBR2-bgp] peer 4.4.4.4 route-policy policy1 export
[*ASBR2-bgp] peer 4.4.4.4 label-route-capability
[*ASBR2-bgp] peer 4.4.4.4 connect-interface loopback 1
[*ASBR2-bgp] peer 10.20.1.1 as-number 100
[*ASBR2-bgp] peer 10.20.1.1 route-policy policy2 export
[*ASBR2-bgp] peer 10.20.1.1 label-route-capability check-tunnel-reachable
[*ASBR2-bgp] peer 10.20.1.1 connect-interface gigabitethernet 1/0/0
[*ASBR2-bgp] quit
[*ASBR2] commit

# 配置PE2。

[~PE2] bgp 200
[*PE2-bgp] peer 3.3.3.3 as-number 200
[*PE2-bgp] peer 3.3.3.3 label-route-capability
[*PE2-bgp] peer 3.3.3.3 connect-interface loopback 1
[*PE2-bgp] quit
[*PE2] commit

完成此步配置，在ASBR上执行命令，可以看见PE与相同AS的ASBR之间建立的IBGP会话状态为“Established”，ASBR之间的EBGP会话状态也为“Established”。以ASBR1的显示为例：

[~ASBR1] display bgp peerBGP local router ID : 2.2.2.2Local AS number : 100Total number of peers : 2                 Peers in established state : 2Peer            V    AS  MsgRcvd  MsgSent  OutQ  Up/Down       State  PrefRcv1.1.1.1         4   100      111      128     0 00:34:24 Established       0
10.20.1.2        4   200       75       89     0 00:38:40 Established       1

在ASBR上执行display tunnel-info all命令，可发现创建了“mpls local ifnet”类型的隧道。以ASBR1的显示为例：

[~ASBR1] display tunnel-info all
Tunnel ID                     Type                Destination         Status
-----------------------------------------------------------------------------
0x0000000001004c4b42          ldp                 1.1.1.1             UP
0x000000000c00030000          mpls local ifnet    10.20.1.2           UP

6.PE1和PE2之间建立MP-EBGP对等体

# 配置PE1。

[~PE1] bgp 100
[*PE1-bgp] peer 4.4.4.4 as-number 200
[*PE1-bgp] peer 4.4.4.4 ebgp-max-hop 255
[*PE1-bgp] peer 4.4.4.4 connect-interface loopback 1
[*PE1-bgp] l2vpn-ad-family
[*PE1-bgp-af-l2vpn-ad] peer 4.4.4.4 enable
[*PE1-bgp-af-l2vpn-ad] peer 4.4.4.4 signaling vpls
[*PE1-bgp-af-l2vpn-ad] quit
[*PE1-bgp] quit
[*PE1] commit

# 配置PE2。

[~PE2] bgp 200
[*PE2-bgp] peer 1.1.1.1 as-number 100
[*PE2-bgp] peer 1.1.1.1 ebgp-max-hop 255
[*PE2-bgp] peer 1.1.1.1 connect-interface loopback 1
[*PE2-bgp] l2vpn-ad-family
[*PE2-bgp-af-l2vpn-ad] peer 1.1.1.1 enable
[*PE2-bgp-af-l2vpn-ad] peer 1.1.1.1 signaling vpls
[*PE2-bgp-af-l2vpn-ad] quit
[*PE2-bgp] quit
[*PE2] commit

完成此步配置，在PE1或PE2上执行display bgp l2vpn-ad peer命令，可发现PE1与PE2之间的MP-EBGP对等体状态为“Established”。以PE1的显示为例：

[~PE1] display bgp l2vpn-ad peerBGP local router ID : 1.1.1.1Local AS number : 100Total number of peers : 1                 Peers in established state : 1Peer            V    AS  MsgRcvd  MsgSent  OutQ  Up/Down       State       PrefRcv4.4.4.4         4   200       74       66     0 00: 46:06      Established       1

在PE上执行display tunnel-info all命令，可发现跨域隧道建立成功。以PE1的显示为例：

[~PE1] display tunnel-info all
Tunnel ID                     Type                Destination         Status
-----------------------------------------------------------------------------
0x0000000001004c4b42          ldp                 2.2.2.2             UP
0x000000000201040000          bgp                 4.4.4.4             UP

7.PE上配置VSI实例，接入CE

# 配置PE1。

[~PE1] mpls l2vpn
[*PE1-l2vpn] quit
[~PE1] vsi v1 auto
[*PE1-vsi-v1] pwsignal bgp
[*PE1-vsi-v1-bgp] route-distinguisher 100:1
[*PE1-vsi-v1-bgp] vpn-target 1:1 import-extcommunity
[*PE1-vsi-v1-bgp] vpn-target 1:1 export-extcommunity
[*PE1-vsi-v1-bgp] site 1 range 5 default-offset 0
[*PE1-vsi-v1-bgp] quit
[*PE1-vsi-v1] quit
[*PE1] interface gigabitethernet1/0/0.1
[*PE1-GigabitEthernet1/0/0.1] shutdown
[*PE1-GigabitEthernet1/0/0.1] vlan-type dot1q 10
[*PE1-GigabitEthernet1/0/0.1] l2 binding vsi v1
[*PE1-GigabitEthernet1/0/0.1] undo shutdown
[*PE1-GigabitEthernet1/0/0.1] quit
[*PE11] commit

# 配置PE2。

[~PE2] mpls l2vpn
[*PE2-l2vpn] quit
[*PE2] vsi v1 auto
[*PE2-vsi-v1] pwsignal bgp
[*PE2-vsi-v1-bgp] route-distinguisher 200:1
[*PE2-vsi-v1-bgp] vpn-target 1:1 import-extcommunity
[*PE2-vsi-v1-bgp] vpn-target 1:1 export-extcommunity
[*PE2-vsi-v1-bgp] site 2 range 5 default-offset 0
[*PE2-vsi-v1-bgp] quit
[*PE2-vsi-v1] quit
[*PE2] interface gigabitethernet2/0/0.1
[*PE2-GigabitEthernet2/0/0.1] shutdown
[*PE2-GigabitEthernet2/0/0.1] vlan-type dot1q 10
[*PE2-GigabitEthernet2/0/0.1] l2 binding vsi v1
[*PE2-GigabitEthernet2/0/0.1] undo shutdown
[*PE2-GigabitEthernet2/0/0.1] quit
[*PE2] commit

# 配置CE1。

[~CE1] interface gigabitethernet1/0/0.1
[*CE1-GigabitEthernet1/0/0.1] shutdown
[*CE1-GigabitEthernet1/0/0.1] vlan-type dot1q 10
[*CE1-GigabitEthernet1/0/0.1] ip address 10.1.1.1 24
[*CE1-GigabitEthernet1/0/0.1] undo shutdown
[*CE1-GigabitEthernet1/0/0.1] quit
[*CE1] commit

# 配置CE2。

[~CE2] interface gigabitethernet1/0/0.1
[*CE2-GigabitEthernet1/0/0.1] shutdown
[*CE2-GigabitEthernet1/0/0.1] vlan-type dot1q 10
[*CE2-GigabitEthernet1/0/0.1] ip address 10.1.1.2 24
[*CE2-GigabitEthernet1/0/0.1] undo shutdown
[*CE2-GigabitEthernet1/0/0.1] quit
[*CE2] commit

8.验证配置结果

在PE上查看VSI信息，可以看到VSI状态为Up。到远端PE的PW状态也为Up。使用的隧道为之前建立的跨域LSP。以PE1显示为例：

[~PE1] display vsi name v1 verbose***VSI Name               : v1Administrator VSI      : noIsolate Spoken         : disableVSI Index              : 0PW Signaling           : bgpMember Discovery Style : autoPW MAC Learn Style     : unqualifyEncapsulation Type     : vlanMTU                    : 1500Diffserv Mode          : uniformService Class          : --Color                  : --DomainId               : 255Domain Name            :Ignore AcState         : disableMulticast Fast Swicth  : disableCreate Time            : 0 days, 0 hours, 27 minutes, 17 secondsVSI State              : upResource Status        : ValidBGP RD                 : 100:1SiteID/Range/Offset    : 1/5/0Import vpn target      : 1:1Export vpn target      : 1:1Remote Label Block     : 25600/5/0Local Label Block      : 25600/5/0Interface Name         : GigabitEthernet1/0/0.1State                  : upLast Up Time           : 2014/05/17 10:29:49 Total Up Time          : 0 days, 0 hours, 26 minutes, 27 seconds**PW Information:*Peer Ip Address        : 4.4.4.4PW State               : upLocal VC Label         : 25602Remote VC Label        : 25601PW Type                : labelTunnel ID              : 0x6002024Broadcast Tunnel ID    : 0x6002024                        Ckey                   : 0x6                                                Nkey                   : 0x5                                                Main PW Token          : 0x6002024                                           Slave PW Token         : 0x0                                                Tnl Type               : BGP                                                OutInterface           : 1POS2/0/0                                           Stp Enable             : 0Mac Flapping           : 0      PW Last Up Time        : 2014/05/17 10:31:05PW Total Up Time       : 0 days, 0 hours, 25 minutes, 32 seconds

在PE1上执行display vpls connection bgp verbose命令查看BGP VPLS连接，可发现连接状态为Up。

[~PE1] display vpls connection bgp verbose
VSI Name: v1                               Signaling: bgp**Remote Site ID     : 2VC State           : upRD                 : 200:1Encapsulation      : bgp vplsMTU                : 1500Peer Ip Address    : 4.4.4.4PW Type            : labelLocal VC Label     : 25602Remote VC Label    : 25601Tunnel Policy      : --Tunnel ID          : 0x2002001Remote Label Block : 25600/5/0Export vpn target  : 1:1

CE1与CE2能互相ping通。

[~CE1] ping 10.1.1.2PING 10.1.1.2: 56  data bytes, press CTRL_C to breakReply from 10.1.1.2: bytes=56 Sequence=1 ttl=255 time=90 msReply from 10.1.1.2: bytes=56 Sequence=2 ttl=255 time=77 msReply from 10.1.1.2: bytes=56 Sequence=3 ttl=255 time=34 msReply from 10.1.1.2: bytes=56 Sequence=4 ttl=255 time=46 msReply from 10.1.1.2: bytes=56 Sequence=5 ttl=255 time=94 ms--- 10.1.1.2 ping statistics ---5 packet(s) transmitted5 packet(s) received0.00% packet lossround-trip min/avg/max = 34/68/94 ms

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组网需求在VPLS网络中运营商为了提供高可靠性的服务,往往会部署冗余链路,CE通过冗余链路接入一对PE.然而这种冗余链路在提供了链路保护的同时,也存在环路风险.为解决环路问题,可以提出通过在PE上部 ...
华为运营商级路由器配置示例 | 配置BGP VPLS和LDP VPLS interworking示例
组网需求如图1,PE1和SPE之间部署LDP方式VPLS,SPE.PE2.PE3之间部署BGP方式VPLS.为实现CE1.CE2和CE3设备之间的互通,需要在LDP方式VPLS和BGP方式VPLS之 ...
华为运营商级路由器配置示例 | 配置BGP方式VPLS示例
组网需求如图1,两台设备PE1和PE2作为PE启动VPLS功能.CE1连接到PE1设备上,CE2连接到PE2上.CE1和CE2属于一个VPLS. 采用BGP作为VPLS信令建立PW,通过配置VPN ...

华为运营商级路由器配置示例 | 配置OptionC方式跨域BGP VPLS示例

组网需求

配置思路

操作步骤

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