【高级交换技术】配置QinQ终结子接口接入VLL示例
简介
VLL是建立在MPLS技术上的点到点二层隧道技术，可以在MPLS骨干网上透明传输二层数据，从而使得位于不同物理位置的属于同一个VLAN的站点之间可以相互通信。
QinQ终结子接口接入VLL是指在报文通过VLL网络传输前，先由设备上的路由子接口对设备的双层VLAN Tag进行终结，然后才进入VLL网络进行传输。
QinQ终结子接口接入VLL适用于某一站点的所有VLAN（例如：VLAN100-VLAN200）都需要与异地站点进行通信，或是需要节省公网VLAN数量的场景。此时，您需要通过CE与PE间部署的交换机设备，对不同CE发送过来的不同的VLAN Tag报文打上相同的外层VLAN TAG，然后再通过PE上的子接口将QinQ报文终结后由VLL隧道进行转发。
通过该技术，由QinQ作为核心VLL网络在城域以太网VPN的延伸，形成了端到端的VPN技术，解决了位于不同地理位置的用户的二层通信的问题。
配置注意事项
- 本举例适用的产品和版本包括：
- S5700-HI、S5710-EI：V200R002C00及后续版本
- S5720-EI：V200R009C00及后续版本
- S5720-HI：V200R007C10及后续版本
- S5710-HI、S5730-HI、S5731-H、S5731-H-K、S5731S-H、S5732-H、S5732-H-K：适用版本请参见“案例适用的产品和版本说明”中的表1
- S6700-EI：V200R005（C00&C01）
- S6720-EI、S6720S-EI、S6720-HI、S6730-H、S6730-H-K、S6730S-H、S6730-S、S6730S-S：适用版本请参见“案例适用的产品和版本说明”中的表1
- S7703、S7706、S7712、S7703 PoE、S7706 PoE、S7710、S7905、S7908、S9703、S9706、S9712：适用版本请参见“案例适用的产品和版本说明”中的表1
- E3L系列单板和S系列中的SA单板不支持VLL功能，X1E系列单板在V200R007以及后续版本支持VLL功能。
如需了解交换机软件配套详细信息，请点击硬件查询工具。
组网需求
如图1所示，CE1、CE2分别通过VLAN方式接入PE1和PE2。
CE1和CE2之间建立Martini方式的VLL。
Switch1分别与CE1、PE1相连。
Switch2分别与CE2、PE2相连。
Switch与CE侧接口配置灵活QinQ，对CE发送过来的报文打上运营商指定允许通过的外层VLAN Tag。
当Switch连接多个CE时，对不同CE发送过来的不同的VLAN Tag报文打上相同的外层VLAN Tag，还可以达到节省公网VLAN数量的目的。
图1 配置QinQ终结子接口接入VLL组网图
| Switch |
接口 |
对应的三层接口 |
IP地址 |
|---|---|---|---|
| PE1 |
GigabitEthernet1/0/0 |
GigabitEthernet1/0/0.1 |
- |
| - |
GigabitEthernet2/0/0 |
VLANIF20 |
10.1.1.1/24 |
| - |
Loopback1 |
- |
1.1.1.1/32 |
| PE2 |
GigabitEthernet1/0/0 |
VLANIF30 |
10.2.2.1/24 |
| - |
GigabitEthernet2/0/0 |
GigabitEthernet2/0/0.1 |
- |
| - |
Loopback1 |
- |
3.3.3.3/32 |
| P |
GigabitEthernet1/0/0 |
VLANIF30 |
10.2.2.2/24 |
| - |
GigabitEthernet2/0/0 |
VLANIF20 |
10.1.1.2/24 |
| - |
Loopback1 |
- |
2.2.2.2/32 |
| CE1 |
GigabitEthernet1/0/0 |
VLANIF10 |
10.10.10.1/24 |
| CE2 |
GigabitEthernet1/0/0 |
VLANIF10 |
10.10.10.2/24 |
配置思路
采用如下的思路配置QinQ终结子接口接入VLL：
-
在骨干网相关设备（PE、P）上配置路由协议实现互通，并使能MPLS。
-
本例使用缺省隧道策略，建立LSP作为传输业务数据的隧道。
-
PE上使能MPLS L2VPN，并创建VC连接。
-
在PE连接Switch的接口上配置QinQ终结子接口接入VLL。
-
在Switch连接CE的接口上配置灵活QinQ。
操作步骤
- 按图1配置CE、PE和P的各接口所属VLAN和VLANIF接口的IP地址
# 配置CE1，要求CE1发送给Switch1的报文带有一层VLAN Tag。
system-view [HUAWEI] sysname CE1 [CE1] vlan batch 10 [CE1] interface gigabitethernet 1/0/0 [CE1-GigabitEthernet1/0/0] port link-type trunk [CE1-GigabitEthernet1/0/0] port trunk allow-pass vlan 10 [CE1-GigabitEthernet1/0/0] quit [CE1] interface vlanif 10 [CE1-Vlanif10] ip address 10.10.10.1 24 [CE1-Vlanif10] quit # 配置CE2，要求CE2发送给Switch2的报文带有一层VLAN Tag。
system-view [HUAWEI] sysname CE2 [CE2] vlan batch 10 [CE2] interface gigabitethernet 1/0/0 [CE2-GigabitEthernet1/0/0] port link-type trunk [CE2-GigabitEthernet1/0/0] port trunk allow-pass vlan 10 [CE2-GigabitEthernet1/0/0] quit [CE2] interface vlanif 10 [CE2-Vlanif10] ip address 10.10.10.2 24 [CE2-Vlanif10] quit # 配置PE1。
system-view [HUAWEI] sysname PE1 [PE1] vlan batch 20 [PE1] interface gigabitethernet 2/0/0 [PE1-GigabitEthernet2/0/0] port link-type hybrid [PE1-GigabitEthernet2/0/0] port hybrid pvid vlan 20 [PE1-GigabitEthernet2/0/0] port hybrid tagged vlan 20 [PE1-GigabitEthernet2/0/0] quit [PE1] interface vlanif 20 [PE1-Vlanif20] ip address 10.1.1.1 24 [PE1-Vlanif20] quit # 配置P。
system-view [HUAWEI] sysname P [P] vlan batch 20 30 [P] interface gigabitethernet 1/0/0 [P-GigabitEthernet1/0/0] port link-type hybrid [P-GigabitEthernet1/0/0] port hybrid pvid vlan 30 [P-GigabitEthernet1/0/0] port hybrid tagged vlan 30 [P-GigabitEthernet1/0/0] quit [P] interface gigabitethernet 2/0/0 [P-GigabitEthernet2/0/0] port link-type hybrid [P-GigabitEthernet2/0/0] port hybrid pvid vlan 20 [P-GigabitEthernet2/0/0] port hybrid tagged vlan 20 [P-GigabitEthernet2/0/0] quit [P] interface vlanif 20 [P-Vlanif20] ip address 10.1.1.2 24 [P-Vlanif20] quit [P] interface vlanif 30 [P-Vlanif30] ip address 10.2.2.2 24 [P-Vlanif30] quit # 配置PE2。
system-view [HUAWEI] sysname PE2 [PE2] vlan batch 30 [PE2] interface gigabitethernet 1/0/0 [PE2-GigabitEthernet1/0/0] port link-type hybrid [PE2-GigabitEthernet1/0/0] port hybrid pvid vlan 30 [PE2-GigabitEthernet1/0/0] port hybrid tagged vlan 30 [PE2-GigabitEthernet1/0/0] quit [PE2] interface vlanif 30 [PE2-Vlanif30] ip address 10.2.2.1 24 [PE2-Vlanif30] quit - 在Switch的接口上配置灵活QinQ和允许通过的VLAN
# 配置Switch1。
system-view [HUAWEI] sysname Switch1 [Switch1] vlan 100 [Switch1-vlan100] quit [Switch1] interface gigabitethernet2/0/0 [Switch1-GigabitEthernet2/0/0] port link-type hybrid [Switch1-GigabitEthernet2/0/0] port hybrid tagged vlan 100 [Switch1-GigabitEthernet2/0/0] quit [Switch1] interface gigabitethernet1/0/0 [Switch1-GigabitEthernet1/0/0] port link-type hybrid [Switch1-GigabitEthernet1/0/0] port hybrid untagged vlan 100 [Switch1-GigabitEthernet1/0/0] port vlan-stacking vlan 10 stack-vlan 100 //盒式交换机，需要先通过命令qinq vlan-translation enable使能VLAN转换功能 [Switch1-GigabitEthernet1/0/0] quit # 配置Switch2。
system-view [HUAWEI] sysname Switch2 [Switch2] vlan 100 [Switch2-vlan100] quit [Switch2] interface gigabitethernet2/0/0 [Switch2-GigabitEthernet2/0/0] port link-type hybrid [Switch2-GigabitEthernet2/0/0] port hybrid tagged vlan 100 [Switch2-GigabitEthernet2/0/0] quit [Switch2] interface gigabitethernet1/0/0 [Switch2-GigabitEthernet1/0/0] port link-type hybrid [Switch2-GigabitEthernet1/0/0] port hybrid untagged vlan 100 [Switch2-GigabitEthernet1/0/0] port vlan-stacking vlan 10 stack-vlan 100 //盒式交换机，需要先通过命令qinq vlan-translation enable使能VLAN转换功能 [Switch2-GigabitEthernet1/0/0] quit - 在MPLS骨干网上配置IGP，本示例中使用OSPF
配置OSPF时，注意需要发布PE1、P和PE2作为LSR ID的32位Loopback接口地址。
# 配置PE1。
[PE1] router id 1.1.1.1 [PE1] interface loopback 1 [PE1-LoopBack1] ip address 1.1.1.1 32 [PE1-LoopBack1] quit [PE1] ospf 1 [PE1-ospf-1] area 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 10.1.1.1 0.0.0.255 [PE1-ospf-1-area-0.0.0.0] quit [PE1-ospf-1] quit
# 配置P。
[P] router id 2.2.2.2 [P] interface loopback 1 [P-LoopBack1] ip address 2.2.2.2 32 [P-LoopBack1] quit [P] ospf 1 [P-ospf-1] area 0 [P-ospf-1-area-0.0.0.0] network 2.2.2.2 0.0.0.0 [P-ospf-1-area-0.0.0.0] network 10.1.1.2 0.0.0.255 [P-ospf-1-area-0.0.0.0] network 10.2.2.2 0.0.0.255 [P-ospf-1-area-0.0.0.0] quit [P-ospf-1] quit
# 配置PE2。
[PE2] router id 3.3.3.3 [PE2] interface loopback 1 [PE2-LoopBack1] ip address 3.3.3.3 32 [PE2-LoopBack1] quit [PE2] ospf 1 [PE2-ospf-1] area 0 [PE2-ospf-1-area-0.0.0.0] network 3.3.3.3 0.0.0.0 [PE2-ospf-1-area-0.0.0.0] network 10.2.2.1 0.0.0.255 [PE2-ospf-1-area-0.0.0.0] quit [PE2-ospf-1] quit
# 配置完成后，PE1、P、PE2之间应能建立OSPF邻居关系，执行display ospf peer命令可以看到邻居状态为Full。执行display ip routing-table命令可以看到PE之间学习到对方的Loopback1接口路由。以PE1的显示为例：
[PE1] display ospf peer OSPF Process 1 with Router ID 1.1.1.1 Neighbors Area 0.0.0.0 interface 10.1.1.1(Vlanif20)'s neighbors Router ID: 2.2.2.2 Address: 10.1.1.2 State: Full Mode:Nbr is Master Priority: 1 DR: 10.1.1.2 BDR: 10.1.1.1 MTU: 0 Dead timer due in 34 sec Retrans timer interval: 5 Neighbor is up for 00:01:16 Authentication Sequence: [ 0 ][PE1] display ip routing-table Route Flags: R - relay, D - download to fib, T - to -instance ------------------------------------------------------------------------------ Routing Tables: Public Destinations : 8 Routes : 8 Destination/Mask Proto Pre Cost Flags NextHop Interface 1.1.1.1/32 Direct 0 0 D 127.0.0.1 LoopBack1 2.2.2.2/32 OSPF 10 1 D 10.1.1.2 Vlanif20 3.3.3.3/32 OSPF 10 2 D 10.1.1.2 Vlanif20 10.1.1.0/24 Direct 0 0 D 10.1.1.1 Vlanif20 10.1.1.1/32 Direct 0 0 D 127.0.0.1 Vlanif20 10.2.2.0/24 OSPF 10 2 D 10.1.1.2 Vlanif20 127.0.0.0/8 Direct 0 0 D 127.0.0.1 InLoopBack0 127.0.0.1/32 Direct 0 0 D 127.0.0.1 InLoopBack0 - 在MPLS骨干网上配置MPLS基本能力和LDP
# 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 vlanif 20 [PE1-Vlanif20] mpls [PE1-Vlanif20] mpls ldp [PE1-Vlanif20] quit
# 配置P。
[P] mpls lsr-id 2.2.2.2 [P] mpls [P-mpls] quit [P] mpls ldp [P-mpls-ldp] quit [P] interface vlanif 20 [P-Vlanif20] mpls [P-Vlanif20] mpls ldp [P-Vlanif20] quit [P] interface vlanif 30 [P-Vlanif30] mpls [P-Vlanif30] mpls ldp [P-Vlanif30] quit
# 配置PE2。
[PE2] mpls lsr-id 3.3.3.3 [PE2] mpls [PE2-mpls] quit [PE2] mpls ldp [PE2-mpls-ldp] quit [PE2] interface vlanif 30 [PE2-Vlanif30] mpls [PE2-Vlanif30] mpls ldp [PE2-Vlanif30] quit
- 在PE之间建立远端LDP会话
# 配置PE1。
[PE1] mpls ldp remote-peer 3.3.3.3 [PE1-mpls-ldp-remote-3.3.3.3] remote-ip 3.3.3.3 [PE1-mpls-ldp-remote-3.3.3.3] quit
# 配置PE2。
[PE2] mpls ldp remote-peer 1.1.1.1 [PE2-mpls-ldp-remote-1.1.1.1] remote-ip 1.1.1.1 [PE2-mpls-ldp-remote-1.1.1.1] quit
上述配置完成后，在PE1上执行display mpls ldp session命令查看LDP会话的建立情况，可以看到增加了与PE2的LDP会话。
以PE1的显示为例：
[PE1] display mpls ldp session LDP Session(s) in Public Network Codes: LAM(Label Advertisement Mode), SsnAge Unit(DDDD:HH:MM) A '*' before a session means the session is being deleted. ------------------------------------------------------------------------------ PeerID Status LAM SsnRole SsnAge KASent/Rcv ------------------------------------------------------------------------------ 2.2.2.2:0 Operational DU Passive 0000:15:29 3717/3717 3.3.3.3:0 Operational DU Passive 0000:00:00 2/2 ------------------------------------------------------------------------------ TOTAL: 2 session(s) Found.
- 在PE上使能MPLS L2VPN，并创建VC连接
# 配置PE1：在接入Switch1的接口gigabitethernet1/0/0.1上创建VC。
[PE1] mpls l2 [PE1-l2] quit [PE1] vcmp role silent [PE1] interface gigabitethernet1/0/0 [PE1-GigabitEthernet1/0/0] port link-type hybrid [PE1-GigabitEthernet1/0/0] quit [PE1] interface gigabitethernet1/0/0.1 [PE1-GigabitEthernet1/0/0.1] qinq termination pe-vid 100 ce-vid 10 [PE1-GigabitEthernet1/0/0.1] mpls l2vc 3.3.3.3 101 [PE1-GigabitEthernet1/0/0.1] quit
# 配置PE2：在接入Switch2的接口gigabitethernet2/0/0.1上创建VC。
[PE2] mpls l2 [PE2-l2] quit [PE2] vcmp role silent [PE2] interface gigabitethernet2/0/0 [PE2-GigabitEthernet2/0/0] port link-type hybrid [PE2-GigabitEthernet2/0/0] quit [PE2] interface gigabitethernet2/0/0.1 [PE2-GigabitEthernet2/0/0.1] qinq termination pe-vid 100 ce-vid 10 [PE2-GigabitEthernet2/0/0.1] mpls l2vc 1.1.1.1 101 [PE2-GigabitEthernet2/0/0.1] quit
- 验证配置结果
在PE上查看L2VPN连接信息，可以看到建立了一条L2VC，状态为UP。
以PE1的显示为例：
[PE1] display mpls l2vc interface gigabitethernet1/0/0.1 *client interface : GigabitEthernet1/0/0.1 is up Administrator PW : no session state : up AC status : up Ignore AC state : disable VC state : up Ignore AC state : disable Label state : 0 Token state : 0 VC ID : 101 VC type : VLAN destination : 3.3.3.3 local group ID : 0 remote group ID : 0 local VC label : 23552 remote VC label : 23552 local AC OAM State : up local PSN OAM State : up local forwarding state : forwarding local status code : 0x0 remote AC OAM state : up remote PSN OAM state : up remote forwarding state: forwarding remote status code : 0x0 ignore standby state : no BFD for PW : unavailable VCCV State : up manual fault : not set active state : active forwarding entry : exist link state : up local VC MTU : 1500 remote VC MTU : 1500 local VCCV : alert ttl lsp-ping bfd remote VCCV : alert ttl lsp-ping bfd local control word : disable remote control word : disable tunnel policy name : -- PW template name : -- primary or secondary : primary load balance type : flow Access-port : false Switchover Flag : false VC tunnel/token info : 1 tunnels/tokens NO.0 TNL type : lsp , TNL ID : 0x10031 Backup TNL type : lsp , TNL ID : 0x0 create time : 1 days, 22 hours, 15 minutes, 9 seconds up time : 0 days, 22 hours, 54 minutes, 57 seconds last change time : 0 days, 22 hours, 54 minutes, 57 seconds VC last up time : 2010/10/09 19:26:37 VC total up time : 1 days, 20 hours, 42 minutes, 30 seconds CKey : 8 NKey : 3 PW redundancy mode : frr AdminPw interface : -- AdminPw link state : -- Diffserv Mode : uniform Service Class : be Color : -- DomainId : -- Domain Name : --CE1和CE2能够相互Ping通。
以CE1的显示为例：
[CE1] ping 10.10.10.2 PING 10.10.10.2: 56 data bytes, press CTRL_C to break Reply from 10.10.10.2: bytes=56 Sequence=1 ttl=255 time=31 ms Reply from 10.10.10.2: bytes=56 Sequence=2 ttl=255 time=10 ms Reply from 10.10.10.2: bytes=56 Sequence=3 ttl=255 time=5 ms Reply from 10.10.10.2: bytes=56 Sequence=4 ttl=255 time=2 ms Reply from 10.10.10.2: bytes=56 Sequence=5 ttl=255 time=28 ms --- 10.10.10.2 ping statistics --- 5 packet(s) transmitted 5 packet(s) received 0.00% packet loss round-trip min/avg/max = 2/15/31 ms
配置文件
-
CE1的配置文件
# sysname CE1 # vlan batch 10 # interface Vlanif10 ip address 10.10.10.1 255.255.255.0 # interface GigabitEthernet1/0/0 port link-type trunk port trunk allow-pass vlan 10 # return
-
Switch1的配置文件
# sysname Switch1 # vlan batch 100 # interface GigabitEthernet1/0/0 port link-type hybrid port hybrid untagged vlan 100 port vlan-stacking vlan 10 stack-vlan 100 # interface GigabitEthernet2/0/0 port link-type hybrid port hybrid tagged vlan 100 # return
-
PE1的配置文件
# sysname PE1 # router id 1.1.1.1 # vcmp role silent # vlan batch 20 # mpls lsr-id 1.1.1.1 mpls # mpls l2 # mpls ldp # mpls ldp remote-peer 3.3.3.3 remote-ip 3.3.3.3 # interface Vlanif20 ip address 10.1.1.1 255.255.255.0 mpls mpls ldp # interface GigabitEthernet1/0/0 port link-type hybrid # interface GigabitEthernet1/0/0.1 qinq termination pe-vid 100 ce-vid 10 mpls l2vc 3.3.3.3 101 # interface GigabitEthernet2/0/0 port link-type hybrid port hybrid pvid vlan 20 port hybrid tagged vlan 20 # interface LoopBack1 ip address 1.1.1.1 255.255.255.255 # ospf 1 area 0.0.0.0 network 1.1.1.1 0.0.0.0 network 10.1.1.0 0.0.0.255 # return
-
P的配置文件
# sysname P # router id 2.2.2.2 # vlan batch 20 30 # mpls lsr-id 2.2.2.2 mpls # mpls ldp # interface Vlanif20 ip address 10.1.1.2 255.255.255.0 mpls mpls ldp # interface Vlanif30 ip address 10.2.2.2 255.255.255.0 mpls mpls ldp # interface GigabitEthernet1/0/0 port link-type hybrid port hybrid pvid vlan 30 port hybrid tagged vlan 30 # interface GigabitEthernet2/0/0 port link-type hybrid port hybrid pvid vlan 20 port hybrid tagged vlan 20 # interface LoopBack1 ip address 2.2.2.2 255.255.255.255 # ospf 1 area 0.0.0.0 network 2.2.2.2 0.0.0.0 network 10.1.1.0 0.0.0.255 network 10.2.2.0 0.0.0.255 # return
-
PE2的配置文件
# sysname PE2 # router id 3.3.3.3 # vcmp role silent # vlan batch 30 # mpls lsr-id 3.3.3.3 mpls # mpls l2 # mpls ldp # mpls ldp remote-peer 1.1.1.1 remote-ip 1.1.1.1 # interface Vlanif30 ip address 10.2.2.1 255.255.255.0 mpls mpls ldp # interface GigabitEthernet1/0/0 port link-type hybrid port hybrid pvid vlan 30 port hybrid tagged vlan 30 # interface GigabitEthernet2/0/0 port link-type hybrid # interface GigabitEthernet2/0/0.1 qinq termination pe-vid 100 ce-vid 10 mpls l2vc 1.1.1.1 101 # interface LoopBack1 ip address 3.3.3.3 255.255.255.255 # ospf 1 area 0.0.0.0 network 3.3.3.3 0.0.0.0 network 10.2.2.0 0.0.0.255 # return
-
Switch2的配置文件
# sysname Switch2 # vlan batch 100 # interface GigabitEthernet1/0/0 port link-type hybrid port hybrid untagged vlan 100 port vlan-stacking vlan 10 stack-vlan 100 # interface GigabitEthernet2/0/0 port link-type hybrid port hybrid tagged vlan 100 # return
-
CE2的配置文件
# sysname CE2 # vlan batch 10 # interface Vlanif10 ip address 10.10.10.2 255.255.255.0 # interface GigabitEthernet1/0/0 port link-type trunk port trunk allow-pass vlan 10 # return