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05-添加或修改报文的VLAN Tag典型配置举例
本章节下载： 05-添加或修改报文的VLAN Tag典型配置举例 (862.75 KB)
目 录
本文档介绍了使用QoS功能添加报文的VLAN Tag的配置方式。
由于802.1Q定义的VLAN ID域只有12个比特，最多只能提供4094个VLAN，不能满足运营商网络对VLAN个数的需求。因此，用户网络报文在进入运营商网络时，运营商网络可以为用户网络报文添加一层VLAN Tag，使运营商网络可以利用一个VLAN为用户网络的多个VLAN的报文提供服务。
用户网络和运营商网络各自有不同的VLAN划分策略，因此用户网络和运营商网络互联，以及不同运营商网络之间互联时可能需要进行VLAN Tag的修改，从而在不修改原有配置的情况下实现互通。
根据应用需求的不同，修改报文的VLAN Tag可以采用下面方法：
· QoS策略：通过定义流分类的匹配规则，可以更灵活的匹配用户网络报文；通过使用流行为的remark customer-vlan-id或remark service-vlan-id动作可以为匹配不同流分类的报文修改内层或外层VLAN Tag。
端口配置添加或修改报文的VLAN Tag功能后，设备会将用户网络的MAC地址学习到SVLAN中。
本文档中的配置均是在实验室环境下进行的配置和验证，配置前设备的所有参数均采用出厂时的缺省配置。如果您已经对设备进行了配置，为了保证配置效果，请确认现有配置和以下举例中的配置不冲突。
本文档假设您已了解QoS Nest特性性。
添加或修改报文的VLAN Tag与EVB功能互斥，请勿同时配置。
如图1所示，Customer A和Customer B各有两个分支机构需要通过运营商网络进行通信。Customer A和Customer B的网络中各有三种不同业务类型的数据，这三种业务类型的数据需要通过运营商网络提供的三个VLAN分开传输，以便运营商网络针对不同业务类型的数据配置不同的传输策略。
现要求通过在运营商网络中配置QoS策略使用户不同业务类型的数据使用不同的外层VLAN Tag在运营商网络中传输。外层VLAN Tag的添加策略如表1所示，传输效果如图2所示。
图1 QoS Nest配置组网图
表1 外层VLAN Tag添加策略
|
用户的业务类型 |
用户网络VLAN |
运营商网络VLAN |
|
|
Customer A: |
Video |
31～40 |
1003 |
|
Voice |
21～30 |
1002 |
|
|
Data |
10～20 |
1001 |
|
|
Customer B: |
Storage |
36～40 |
2003 |
|
Voice |
26～35 |
2002 |
|
|
Data |
15～25 |
2001 |
|
· 请在PE A和PE B连接用户网络的端口上配置QoS策略为用户不同业务类型的数据报文添加不同的外层VLAN Tag。
· 为了保证用户网络接收的数据中不会包含运营商网络的VLAN信息，需要将PE A和PE B连接用户网络的端口的链路类型配置为Hybrid，并允许运营商封装的外层VLAN的报文不带VLAN Tag通过。
· 本举例中通过配置QoS策略为用户不同业务类型的数据报文添加不同的外层VLAN Tag。
表2 适用产品及版本
|
产品 |
软件版本 |
|
S6550X-HI系列 |
Release 1116及以上版本、Release 1213P01及以上版本 |
|
S6880系列 |
Release 1116及以上版本、Release 1213P01及以上版本 |
|
S9820-8M |
Release 1116及以上版本、Release 1213P01及以上版本 |
|
S5580X-HI系列 |
Release 1213P01及以上版本 |
|
S5580X-EI系列 |
Release 1213P01及以上版本 |
· 缺省情况下，端口为报文封装外层VLAN Tag时，如果端口信任报文的802.1p优先级，会将内层VLAN Tag的802.1p优先级复制到外层VLAN Tag的802.1p优先级，如果端口不信任报文的802.1p优先级或入报文没有携带VLAN Tag，会将接收报文的端口的端口优先级作为外层VLAN Tag的802.1p优先级。
· 需要保证报文传输路径上，报文的外层VLAN Tag不被修改或移除。
· 为报文加上外层VLAN Tag后，内层VLAN Tag将被当作报文的数据部分进行传输，报文长度将增加4个字节。因此建议用户适当增加报文传输路径上各接口的MTU值（至少为1504字节）。
# 创建为用户数据分配的VLAN，即VLAN 1001～VLAN 1003、VLAN 2001～VLAN 2003。
<PE_A> system-view
[PE_A] vlan 1001 to 1003
[PE_A] vlan 2001 to 2003
(1) 配置端口Twenty-FiveGigE1/0/1
# 配置端口为Hybrid端口，允许VLAN 1001～VLAN 1003的报文通过，并且在发送时去掉外层Tag，取消允许VLAN 1通过。
[PE_A] interface Twenty-FiveGigE 1/0/1
[PE_A-Twenty-FiveGigE1/0/1] port link-type hybrid
[PE_A-Twenty-FiveGigE1/0/1] undo port hybrid vlan 1
[PE_A-Twenty-FiveGigE1/0/1] port hybrid vlan 1001 to 1003 untagged
# 配置端口信任报文的802.1p优先级。
[PE_A-Twenty-FiveGigE1/0/1] qos trust dot1p
[PE_A-Twenty-FiveGigE1/0/1] quit
(2) 配置端口Twenty-FiveGigE1/0/2
# 配置端口为Hybrid端口，允许VLAN 2001～VLAN 2003的报文通过，并且在发送时去掉外层Tag，取消允许VLAN 1通过。
[PE_A] interface Twenty-FiveGigE 1/0/2
[PE_A-Twenty-FiveGigE1/0/2] port link-type hybrid
[PE_A-Twenty-FiveGigE1/0/2] undo port hybrid vlan 1
[PE_A-Twenty-FiveGigE1/0/2] port hybrid vlan 2001 to 2003 untagged
# 配置端口信任报文的802.1p优先级。
[PE_A-Twenty-FiveGigE1/0/2] qos trust dot1p
[PE_A-Twenty-FiveGigE1/0/2] quit
(3) 配置端口Twenty-FiveGigE1/0/3
# 配置端口为Trunk端口，且允许VLAN 1001～VLAN 1003和VLAN 2001～VLAN 2003的报文通过，取消允许VLAN 1通过。
[PE_A] interface Twenty-FiveGigE 1/0/3
[PE_A-Twenty-FiveGigE1/0/3] port link-type trunk
[PE_A-Twenty-FiveGigE1/0/3] undo port trunk permit vlan 1
[PE_A-Twenty-FiveGigE1/0/3] port trunk permit vlan 1001 to 1003 2001 to 2003
[PE_A-Twenty-FiveGigE1/0/3] quit
(4) 配置QoS策略
# 为Customer A创建一个流分类，匹配规则为用户网络中普通业务数据对应的VLAN。
[PE_A] traffic classifier customer_A_pc
[PE_A-classifier-customer_A_pc] if-match customer-vlan-id 10 to 20
[PE_A-classifier-customer_A_pc] quit
# 按同样方法创建匹配Customer A网络中语音数据和视频数据的流分类。
[PE_A] traffic classifier customer_A_voice
[PE_A-classifier-customer_A_voice] if-match customer-vlan-id 21 to 30
[PE_A-classifier-customer_A_voice] quit
[PE_A] traffic classifier customer_A_video
[PE_A-classifier-customer_A_video] if-match customer-vlan-id 31 to 40
[PE_A-classifier-customer_A_video] quit
# 为Customer A的三种业务数据创建三个流行为，动作为封装相应的外层VLAN Tag。
[PE_A] traffic behavior customer_A_pc
[PE_A-behavior-customer_A_pc] nest top-most vlan 1001
[PE_A-behavior-customer_A_pc] quit
[PE_A] traffic behavior customer_A_voice
[PE_A-behavior-customer_A_voice] nest top-most vlan 1002
[PE_A-behavior-customer_A_voice] quit
[PE_A] traffic behavior customer_A_video
[PE_A-behavior-customer_A_video] nest top-most vlan 1003
[PE_A-behavior-customer_A_video] quit
# 创建用于Customer A的QoS策略，将匹配用户业务数据的流分类与封装相应外层VLAN Tag的流行为进行一一关联。
[PE_A] qos policy customer_A
[PE_A-qospolicy-customer_A] classifier customer_A_pc behavior customer_A_pc
[PE_A-qospolicy-customer_A] classifier customer_A_voice behavior customer_A_voice
[PE_A-qospolicy-customer_A] classifier customer_A_video behavior customer_A_video
[PE_A-qospolicy-customer_A] quit
# 将上面创建的策略应用到Twenty-FiveGigE 1/0/1端口的入方向。
[PE_A] interface Twenty-FiveGigE 1/0/1
[PE_A-Twenty-FiveGigE1/0/1] qos apply policy customer_A inbound
[PE_A-Twenty-FiveGigE1/0/1] quit
# 使用类似方法为Customer B的三种业务数据创建流分类。
[PE_A] traffic classifier customer_B_pc
[PE_A-classifier-customer_B_pc] if-match customer-vlan-id 15 to 25
[PE_A-classifier-customer_B_pc] quit
[PE_A] traffic classifier customer_B_voice
[PE_A-classifier-customer_B_voice] if-match customer-vlan-id 26 to 35
[PE_A-classifier-customer_B_voice] quit
[PE_A] traffic classifier customer_B_storage
[PE_A-classifier-customer_B_storage] if-match customer-vlan-id 36 to 40
[PE_A-classifier-customer_B_storage] quit
# 为Customer B的三种业务数据创建三个流行为，动作为封装相应的外层VLAN Tag。
[PE_A] traffic behavior customer_B_pc
[PE_A-behavior-customer_B_pc] nest top-most vlan 2001
[PE_A-behavior-customer_B_pc] quit
[PE_A] traffic behavior customer_B_voice
[PE_A-behavior-customer_B_voice] nest top-most vlan 2002
[PE_A-behavior-customer_B_voice] quit
[PE_A] traffic behavior customer_B_storage
[PE_A-behavior-customer_B_storage] nest top-most vlan 2003
[PE_A-behavior-customer_B_storage] quit
# 创建用于Customer B的QoS策略，将匹配用户业务数据的流分类与封装相应外层VLAN Tag的流行为进行一一关联。
[PE_A] qos policy customer_B
[PE_A-qospolicy-customer_B] classifier customer_B_pc behavior customer_B_pc
[PE_A-qospolicy-customer_B] classifier customer_B_voice behavior customer_B_voice
[PE_A-qospolicy-customer_B] classifier customer_B_storage behavior customer_B_storage
[PE_A-qospolicy-customer_B] quit
# 将上面创建的策略应用到Twenty-FiveGigE 1/0/2端口的入方向。
[PE_A] interface Twenty-FiveGigE 1/0/2
[PE_A-Twenty-FiveGigE1/0/2] qos apply policy customer_B inbound
[PE_A-Twenty-FiveGigE1/0/2] quit
# 创建为用户数据分配的VLAN，即VLAN 1001～VLAN 1003、VLAN 2001～VLAN 2003。
<PE_B> system-view
[PE_B] vlan 1001 to 1003
[PE_B] vlan 2001 to 2003
(1) 配置端口Twenty-FiveGigE1/0/1
# 配置端口为Hybrid端口，允许VLAN 2001～VLAN 2003的报文通过，并且在发送时去掉外层Tag，取消允许VLAN 1通过。
[PE_B] interface Twenty-FiveGigE 1/0/1
[PE_B-Twenty-FiveGigE1/0/1] port link-type hybrid
[PE_B-Twenty-FiveGigE1/0/1] undo port hybrid vlan 1
[PE_B-Twenty-FiveGigE1/0/1] port hybrid vlan 2001 to 2003 untagged
# 配置端口信任报文的802.1p优先级。
[PE_B-Twenty-FiveGigE1/0/1] qos trust dot1p
[PE_B-Twenty-FiveGigE1/0/1] quit
(2) 配置端口Twenty-FiveGigE1/0/2
# 配置端口为Hybrid端口，允许VLAN 1001～VLAN 1003的报文通过，并且在发送时去掉外层Tag，取消允许VLAN 1通过。
[PE_B] interface Twenty-FiveGigE 1/0/2
[PE_B-Twenty-FiveGigE1/0/2] port link-type hybrid
[PE_B-Twenty-FiveGigE1/0/2] undo port hybrid vlan 1
[PE_B-Twenty-FiveGigE1/0/2] port hybrid vlan 1001 to 1003 untagged
# 配置端口信任报文的802.1p优先级。
[PE_B-Twenty-FiveGigE1/0/2] qos trust dot1p
[PE_B-Twenty-FiveGigE1/0/2] quit
(3) 配置端口Twenty-FiveGigE1/0/3
# 配置端口为Trunk端口，且允许VLAN 1001～VLAN 1003和VLAN 2001～VLAN 2003的报文通过，取消允许VLAN 1通过。
[PE_B] interface Twenty-FiveGigE 1/0/3
[PE_B-Twenty-FiveGigE1/0/3] port link-type trunk
[PE_B-Twenty-FiveGigE1/0/3] undo port trunk permit vlan 1
[PE_B-Twenty-FiveGigE1/0/3] port trunk permit vlan 1001 to 1003 2001 to 2003
[PE_B-Twenty-FiveGigE1/0/3] quit
(4) 配置QoS策略
# 按PE A设备的配置方法，为Customer A的业务数据配置流分类。
[PE_B] traffic classifier customer_A_pc
[PE_B-classifier-customer_A_pc] if-match customer-vlan-id 10 to 20
[PE_B-classifier-customer_A_pc] quit
[PE_B] traffic classifier customer_A_voice
[PE_B-classifier-customer_A_voice] if-match customer-vlan-id 21 to 30
[PE_B-classifier-customer_A_voice] quit
[PE_B] traffic classifier customer_A_video
[PE_B-classifier-customer_A_video] if-match customer-vlan-id 31 to 40
[PE_B-classifier-customer_A_video] quit
# 为Customer A的三种业务数据创建三个流行为，动作为封装相应的外层VLAN Tag。
[PE_B] traffic behavior customer_A_pc
[PE_B-behavior-customer_A_pc] nest top-most vlan 1001
[PE_B-behavior-customer_A_pc] quit
[PE_B] traffic behavior customer_A_voice
[PE_B-behavior-customer_A_voice] nest top-most vlan 1002
[PE_B-behavior-customer_A_voice] quit
[PE_B] traffic behavior customer_A_video
[PE_B-behavior-customer_A_video] nest top-most vlan 1003
[PE_B-behavior-customer_A_video] quit
# 创建用于Customer A的QoS策略，将匹配用户业务数据的流分类与封装相应外层VLAN Tag的流行为进行一一关联。
[PE_B] qos policy customer_A
[PE_B-qospolicy-customer_A] classifier customer_A_pc behavior customer_A_pc
[PE_B-qospolicy-customer_A] classifier customer_A_voice behavior customer_A_voice
[PE_B-qospolicy-customer_A] classifier customer_A_video behavior customer_A_video
[PE_B-qospolicy-customer_A] quit
# 将上面创建的策略应用到Twenty-FiveGigE 1/0/2端口的入方向。
[PE_B] interface Twenty-FiveGigE 1/0/2
[PE_B-Twenty-FiveGigE1/0/2] qos apply policy customer_A inbound
[PE_B-Twenty-FiveGigE1/0/2] quit
# 使用类似方法为Customer B的三种业务数据创建流分类。
[PE_B] traffic classifier customer_B_pc
[PE_B-classifier-customer_B_pc] if-match customer-vlan-id 15 to 25
[PE_B-classifier-customer_B_pc] quit
[PE_B] traffic classifier customer_B_voice
[PE_B-classifier-customer_B_voice] if-match customer-vlan-id 26 to 35
[PE_B-classifier-customer_B_voice] quit
[PE_B] traffic classifier customer_B_storage
[PE_B-classifier-customer_B_storage] if-match customer-vlan-id 36 to 40
[PE_B-classifier-customer_B_storage] quit
# 为Customer B的三种业务数据创建三个流行为，动作为封装相应的外层VLAN Tag。
[PE_B] traffic behavior customer_B_pc
[PE_B-behavior-customer_B_pc] nest top-most vlan 2001
[PE_B-behavior-customer_B_pc] quit
[PE_B] traffic behavior customer_B_voice
[PE_B-behavior-customer_B_voice] nest top-most vlan 2002
[PE_B-behavior-customer_B_voice] quit
[PE_B] traffic behavior customer_B_storage
[PE_B-behavior-customer_B_storage] nest top-most vlan 2003
[PE_B-behavior-customer_B_storage] quit
# 创建用于Customer B的QoS策略，将匹配用户业务数据的流分类与封装相应外层VLAN Tag的流行为进行一一关联。
[PE_B] qos policy customer_B
[PE_B-qospolicy-customer_B] classifier customer_B_pc behavior customer_B_pc
[PE_B-qospolicy-customer_B] classifier customer_B_voice behavior customer_B_voice
[PE_B-qospolicy-customer_B] classifier customer_B_storage behavior customer_B_storage
[PE_B-qospolicy-customer_B] quit
# 将上面创建的策略应用到Twenty-FiveGigE 1/0/1端口的入方向。
[PE_B] interface Twenty-FiveGigE 1/0/1
[PE_B-Twenty-FiveGigE1/0/1] qos apply policy customer_B inbound
[PE_B-Twenty-FiveGigE1/0/1] quit
配置运营商网络中PE A到PE B之间的路径上的设备端口都允许VLAN 1001～VLAN 1003和VLAN 2001～VLAN 2003的报文携带VLAN Tag通过，并配置各端口的MTU值为至少1504字节。
(1) 使用display this命令查看端口的配置，例如：
# 查看PE A上端口Twenty-FiveGigE1/0/1的配置。
[PE_A] interface Twenty-FiveGigE 1/0/1
[PE_A-Twenty-FiveGigE1/0/1] display this
#
interface Twenty-FiveGigE1/0/1
port link-mode bridge
port link-type hybrid
undo port hybrid vlan 1
port hybrid vlan 1001 to 1003 untagged
qos trust dot1p
qos apply policy customer_A inbound
#
Return
[PE_A-Twenty-FiveGigE1/0/1] quit
(2) 查看配置的策略是否正确下发到端口，例如：
# 查看PE A上端口Twenty-FiveGigE 1/0/1上应用的策略。
[PE_A] display qos policy interface Twenty-FiveGigE 1/0/1
Interface: Twenty-FiveGigE1/0/1
Direction: Inbound
Policy: customer_A
Classifier: customer_A_pc
Operator: AND
Rule(s) :
If-match customer-vlan-id 10 to 20
Behavior: customer_A_pc
Nesting:
Nest top-most vlan-id 1001
Classifier: customer_A_voice
Operator: AND
Rule(s) :
If-match customer-vlan-id 21 to 30
Behavior: customer_A_voice
Nesting:
Nest top-most vlan-id 1002
Classifier: customer_A_video
Operator: AND
Rule(s) :
If-match customer-vlan-id 31 to 40
Behavior: customer_A_video
Nesting:
Nest top-most vlan-id 1003
· PE A
#
vlan 1001 to 1003
#
vlan 2001 to 2003
#
traffic classifier customer_A_pc operator and
if-match customer-vlan-id 10 to 20
#
traffic classifier customer_A_voice operator and
if-match customer-vlan-id 21 to 30
#
traffic classifier customer_A_video operator and
if-match customer-vlan-id 31 to 40
#
traffic classifier customer_B_pc operator and
if-match customer-vlan-id 15 to 25
#
traffic classifier customer_B_voice operator and
if-match customer-vlan-id 26 to 35
#
traffic classifier customer_B_storage operator and
if-match customer-vlan-id 36 to 40
#
traffic behavior customer_A_pc
nest top-most vlan 1001
#
traffic behavior customer_A_voice
nest top-most vlan 1002
#
traffic behavior customer_A_video
nest top-most vlan 1003
#
traffic behavior customer_B_pc
nest top-most vlan 2001
#
traffic behavior customer_B_voice
nest top-most vlan 2002
#
traffic behavior customer_B_storage
nest top-most vlan 2003
#
qos policy customer_A
classifier customer_A_pc behavior customer_A_pc
classifier customer_A_voice behavior customer_A_voice
classifier customer_A_video behavior customer_A_video
#
qos policy customer_B
classifier customer_B_pc behavior customer_B_pc
classifier customer_B_voice behavior customer_B_voice
classifier customer_B_storage behavior customer_B_storage
#
interface Twenty-FiveGigE1/0/1
port link-mode bridge
port link-type hybrid
undo port hybrid vlan 1
port hybrid vlan 1001 to 1003 untagged
qos trust dot1p
qos apply policy customer_A inbound
#
interface Twenty-FiveGigE1/0/2
port link-mode bridge
port link-type hybrid
undo port hybrid vlan 1
port hybrid vlan 2001 to 2003 untagged
qos trust dot1p
qos apply policy customer_B inbound
#
interface Twenty-FiveGigE1/0/3
port link-mode bridge
port link-type trunk
undo port trunk permit vlan 1
port trunk permit vlan 1001 to 1003 2001 to 2003
#
· ProviderB的配置
#
vlan 1001 to 1003
#
vlan 2001 to 2003
#
traffic classifier customer_A_pc operator and
if-match customer-vlan-id 10 to 20
#
traffic classifier customer_A_voice operator and
if-match customer-vlan-id 21 to 30
#
traffic classifier customer_A_video operator and
if-match customer-vlan-id 31 to 40
#
traffic classifier customer_B_pc operator and
if-match customer-vlan-id 15 to 25
#
traffic classifier customer_B_voice operator and
if-match customer-vlan-id 26 to 35
#
traffic classifier customer_B_storage operator and
if-match customer-vlan-id 36 to 40
#
traffic behavior customer_A_pc
nest top-most vlan 1001
#
traffic behavior customer_A_voice
nest top-most vlan 1002
#
traffic behavior customer_A_video
nest top-most vlan 1003
#
traffic behavior customer_B_pc
nest top-most vlan 2001
#
traffic behavior customer_B_voice
nest top-most vlan 2002
#
traffic behavior customer_B_storage
nest top-most vlan 2003
#
qos policy customer_A
classifier customer_A_pc behavior customer_A_pc
classifier customer_A_voice behavior customer_A_voice
classifier customer_A_video behavior customer_A_video
#
qos policy customer_B
classifier customer_B_pc behavior customer_B_pc
classifier customer_B_voice behavior customer_B_voice
classifier customer_B_storage behavior customer_B_storage
#
interface Twenty-FiveGigE1/0/1
port link-mode bridge
port link-type hybrid
undo port hybrid vlan 1
port hybrid vlan 2001 to 2003 untagged
qos trust dot1p
qos apply policy customer_B inbound
#
interface Twenty-FiveGigE1/0/2
port link-mode bridge
port link-type hybrid
undo port hybrid vlan 1
port hybrid vlan 1001 to 1003 untagged
qos trust dot1p
qos apply policy customer_A inbound
#
interface Twenty-FiveGigE1/0/3
port link-mode bridge
port link-type trunk
undo port trunk permit vlan 1
port trunk permit vlan 1001 to 1003 2001 to 2003
#
如图3所示，Customer A和Customer B各有两个分支机构需要通过运营商网络进行通信。运营商网络中可用的VLAN资源包括VLAN 1000和VLAN 2000。现要求通过配置QinQ功能，运营商网络能够利用VLAN 1000传输Customer A的数据，利用VLAN 2000传输Customer B的数据。
图3 QinQ组网示意图
· 请在PE A和PE B连接用户网络的端口上配置QinQ功能。
· 为了保证用户网络接收的数据中不会包含运营商网络的VLAN信息，需要配置开启QinQ功能的端口发送PVID的报文时不带VLAN Tag。开启QinQ功能的端口的链路类型可以是Access，Hybrid或Trunk。如果配置为Hybrid类型，需要配置该端口允许PVID的报文不带VLAN Tag通过。如果配置为Trunk类型，需要配置该端口允许PVID的报文通过。
表3 适用产品及版本
|
产品 |
软件版本 |
|
S6550X-HI系列 |
Release 1213P01及以上版本 |
|
S6880系列 |
Release 1213P01及以上版本 |
|
S9820-8M |
Release 1213P01及以上版本 |
|
S5580X-HI系列 |
Release 1213P01及以上版本 |
|
S5580X-EI系列 |
Release 1213P01及以上版本 |
|
S5580S-EI系列 |
Release 1213P01及以上版本 |
· 开启QinQ的端口，需要配置端口的缺省VLAN为QinQ封装的外层VLAN（SVLAN）。
· 需要保证QinQ报文传输路径上，报文的外层VLAN Tag不被修改或移除。
· QinQ为报文加上外层VLAN Tag后，内层VLAN Tag将被当作报文的数据部分进行传输，报文长度将增加4个字节。因此建议用户适当增加QinQ报文传输路径上各接口的MTU值（至少为1504字节）。
# 创建VLAN 1000和VLAN 2000。
<PE_A> system-view
[PE_A] vlan 1000
[PE_A-vlan1000] quit
[PE_A] vlan 2000
[PE_A-vlan2000] quit
# 配置端口Twenty-FiveGigE1/0/1为Access端口，允许VLAN 1000的报文通过。
[PE_A] interface twenty-fivegige 1/0/1
[PE_A-Twenty-FiveGigE1/0/1] port access vlan 1000
# 开启端口Twenty-FiveGigE 1/0/1的QinQ功能。
[PE_A-Twenty-FiveGigE1/0/1] qinq enable
[PE_A-Twenty-FiveGigE1/0/1] quit
# 配置端口Twenty-FiveGigE1/0/2为Access端口，允许VLAN 2000的报文通过。
[PE_A] interface twenty-fivegige 1/0/2
[PE_A-Twenty-FiveGigE1/0/2] port access vlan 2000
# 开启端口Twenty-FiveGigE1/0/2的QinQ功能。
[PE_A-Twenty-FiveGigE1/0/2] qinq enable
[PE_A-Twenty-FiveGigE1/0/2] quit
# 配置端口Twenty-FiveGigE1/0/3为Trunk端口，且允许VLAN 1000和VLAN 2000的报文通过，取消允许VLAN 1通过。
[PE_A] interface twenty-fivegige 1/0/3
[PE_A-Twenty-FiveGigE1/0/3] port link-type trunk
[PE_A-Twenty-FiveGigE1/0/3] port trunk permit vlan 1000 2000
[PE_A-Twenty-FiveGigE1/0/3] undo port trunk permit vlan 1
[PE_A-Twenty-FiveGigE1/0/3] quit
# 创建VLAN 1000和VLAN 2000。
<PE_B> system-view
[PE_B] vlan 1000
[PE_B-vlan1000] quit
[PE_B] vlan 2000
[PE_B-vlan2000] quit
# 配置端口Twenty-FiveGigE1/0/1为Access端口，允许VLAN 2000的报文通过。
[PE_B] interface twenty-fivegige 1/0/1
[PE_B-Twenty-FiveGigE1/0/1] port access vlan 2000
# 开启端口Twenty-FiveGigE1/0/1的QinQ功能。
[PE_B-Twenty-FiveGigE1/0/1] qinq enable
[PE_B-Twenty-FiveGigE1/0/1] quit
# 配置端口Twenty-FiveGigE1/0/2为Access端口，允许VLAN 1000的报文通过。
[PE_B] interface twenty-fivegige 1/0/2
[PE_B-Twenty-FiveGigE1/0/2] port access vlan 1000
# 开启Twenty-FiveGigE1/0/2端口的QinQ功能。
[PE_B-Twenty-FiveGigE1/0/2] qinq enable
[PE_B-Twenty-FiveGigE1/0/2] quit
# 配置端口Twenty-FiveGigE1/0/3为Trunk端口，且允许VLAN 1000和VLAN 2000的报文通过，取消允许VLAN 1通过。
[PE_B] interface twenty-fivegige 1/0/3
[PE_B-Twenty-FiveGigE1/0/3] port link-type trunk
[PE_B-Twenty-FiveGigE1/0/3] port trunk permit vlan 1000 2000
[PE_B-Twenty-FiveGigE1/0/3] undo port trunk permit vlan 1
[PE_B-Twenty-FiveGigE1/0/3] quit
配置运营商网络中PE A到PE B之间的路径上的设备端口都允许VLAN 1000和VLAN 2000的报文携带VLAN Tag通过，且这些端口的MTU值至少为1504字节。
(1) 同一个公司跨越运营商网络的两个分支机构中处于同一CVLAN的两台PC互相进行Ping操作，可以Ping通，且这两台PC能够互相学习到对方的MAC地址。可见CVLAN信息能够跨越运营商网络进行透明传输。
(2) Customer A和Customer B中处于同一CVLAN（例如VLAN 130）中的两台PC互相进行Ping操作。在其中一台PC上查看ARP表项，发现它没有学到对方的MAC地址。可见不同公司中同一CVLAN的流量被二层隔离。
· PE A
#
vlan 1000
#
vlan 2000
#
interface Twenty-FiveGigE1/0/1
port link-mode bridge
port access vlan 1000
qinq enable
#
interface Twenty-FiveGigE1/0/2
port link-mode bridge
port access vlan 2000
qinq enable
#
interface Twenty-FiveGigE1/0/3
port link-mode bridge
port link-type trunk
undo port trunk permit vlan 1
port trunk permit vlan 1000 2000
#
· PE B
#
vlan 1000
#
vlan 2000
interface Twenty-FiveGigE1/0/1
port link-mode bridge
port access vlan 2000
qinq enable
#
interface Twenty-FiveGigE1/0/2
port link-mode bridge
port access vlan 1000
qinq enable
#
interface Twenty-FiveGigE1/0/3
port link-mode bridge
port link-type trunk
undo port trunk permit vlan 1
port trunk permit vlan 1000 2000
#
如图4所示，Customer A和Customer B各有两个分支机构需要通过运营商网络进行通信。Customer A和Customer B的网络中各有三种不同业务类型的数据，这三种业务类型的数据需要通过运营商网络提供的三个VLAN分开传输，以便运营商网络针对不同业务类型的数据配置不同的传输策略。
现要求通过配置1:2 VLAN映射功能实现：
· 用户不同业务类型的数据使用不同的外层VLAN Tag在运营商网络中传输；
· 外层VLAN Tag的添加策略如表4所示，传输效果如图5所示；
· 添加外层VLAN Tag时，设备复制内层VLAN Tag的802.1p优先级作为外层VLAN Tag的802.1p优先级。
图4 1:2 VLAN映射组网图
表4 外层VLAN Tag添加策略
|
用户的业务类型 |
用户网络VLAN |
运营商网络VLAN |
|
|
Customer A |
Video |
31 to 40 |
1003 |
|
Voice |
21 to 30 |
1002 |
|
|
Data |
10 to 20 |
1001 |
|
|
Customer B |
Storage |
36 to 40 |
2003 |
|
Voice |
26 to 35 |
2002 |
|
|
Data |
15 to 25 |
2001 |
|
· 请在PE A和PE B连接用户网络的端口上配置1:2 VLAN映射功能，为用户不同业务类型的数据报文添加不同的外层VLAN Tag。
· 为了保证用户网络接收的数据中不会包含运营商网络的VLAN信息，需要将PE A和PE B连接用户网络的端口的链路类型配置为Hybrid，并允许运营商封装的外层VLAN的报文不带VLAN Tag通过。
· 为了使设备在添加外层VLAN Tag时复制内层VLAN Tag的802.1p优先级做为外层VLAN Tag的802.1p优先级，配置端口信任报文的802.1p优先级。
表5 适用产品及版本
|
产品 |
软件版本 |
|
S6550X-HI系列 |
Release 1213P01及以上版本 |
|
S6880系列 |
Release 1213P01及以上版本 |
|
S9820-8M |
Release 1213P01及以上版本 |
|
S5580X-HI系列 |
Release 1213P01及以上版本 |
|
S5580X-EI系列 |
Release 1213P01及以上版本 |
|
S5580S-EI系列 |
Release 1213P01及以上版本 |
· 在携带两层VLAN Tag的报文的传输路径上，配置各端口的MTU值至少为1504字节。
· 在PE A和PE B的上行端口以及运营商网络的中间设备上，需要保证1:2 VLAN映射封装的外层VLAN Tag不被修改或移除。
# 创建CVLAN 10～40。
<PE_A> system-view
[PE_A] vlan 10 to 40
# 创建SVLAN 1001～1003和SVLAN 2001～2003。
[PE_A] vlan 1001 to 1003
[PE_A] vlan 2001 to 2003
(1) Twenty-FiveGigE1/0/1端口的配置
# 配置端口为Hybrid端口。
[PE_A] interface twenty-fivegige 1/0/1
[PE_A-Twenty-FiveGigE1/0/1] port link-type hybrid
# 配置端口允许CVLAN 10～40的报文携带VLAN Tag通过。
[PE_A-Twenty-FiveGigE1/0/1] port hybrid vlan 10 to 40 tagged
# 配置端口允许SVLAN 1001～1003的报文通过，并且在发送时去掉外层Tag。
[PE_A-Twenty-FiveGigE1/0/1] port hybrid vlan 1001 to 1003 untagged
# 配置端口取消允许VLAN 1通过。
[PE_A-Twenty-FiveGigE1/0/1] undo port hybrid vlan 1
# 配置1:2 VLAN映射功能，为用户网络VLAN 10～20的报文封装VLAN 1001的外层VLAN Tag，为用户网络VLAN 21～30的报文封装VLAN 1002的外层VLAN Tag，为用户网络VLAN 31～40的报文封装VLAN 1003的外层VLAN Tag。
[PE_A-Twenty-FiveGigE1/0/1] vlan mapping nest range 10 to 20 nested-vlan 1001
[PE_A-Twenty-FiveGigE1/0/1] vlan mapping nest range 21 to 30 nested-vlan 1002
[PE_A-Twenty-FiveGigE1/0/1] vlan mapping nest range 31 to 40 nested-vlan 1003
# 配置端口信任报文的802.1p优先级。
[PE_A-Twenty-FiveGigE1/0/1] qos trust dot1p
[PE_A-Twenty-FiveGigE1/0/1] quit
(2) Twenty-FiveGigE1/0/2端口的配置
# 配置端口为Hybrid端口。
[PE_A] interface twenty-fivegige 1/0/2
[PE_A-Twenty-FiveGigE1/0/2] port link-type hybrid
# 配置端口允许CVLAN 15～40的报文携带VLAN Tag通过。
[PE_A-Twenty-FiveGigE1/0/2] port hybrid vlan 15 to 40 tagged
# 配置端口允许SVLAN 2001～2003的报文通过，并且在发送时去掉外层Tag。
[PE_A-Twenty-FiveGigE1/0/2] port hybrid vlan 2001 to 2003 untagged
# 配置端口取消允许VLAN 1通过。
[PE_A-Twenty-FiveGigE1/0/2] undo port hybrid vlan 1
# 配置1:2 VLAN映射功能，为用户网络VLAN 15～25的报文封装VLAN 2001的外层VLAN Tag，为用户网络VLAN 26～35的报文封装VLAN 2002的外层VLAN Tag，为用户网络VLAN 36～40的报文封装VLAN 2003的外层VLAN Tag。
[PE_A-Twenty-FiveGigE1/0/2] vlan mapping nest range 15 to 25 nested-vlan 2001
[PE_A-Twenty-FiveGigE1/0/2] vlan mapping nest range 26 to 35 nested-vlan 2002
[PE_A-Twenty-FiveGigE1/0/2] vlan mapping nest range 36 to 40 nested-vlan 2003
# 配置端口信任报文的802.1p优先级。
[PE_A-Twenty-FiveGigE1/0/2] qos trust dot1p
[PE_A-Twenty-FiveGigE1/0/2] quit
(3) Twenty-FiveGigE1/0/3端口的配置
# 配置端口为Trunk端口，且允许VLAN 1001～1003和VLAN 2001～2003的报文通过，取消允许VLAN 1通过。
[PE_A] interface twenty-fivegige 1/0/3
[PE_A-Twenty-FiveGigE1/0/3] port link-type trunk
[PE_A-Twenty-FiveGigE1/0/3] undo port trunk permit vlan 1
[PE_A-Twenty-FiveGigE1/0/3] port trunk permit vlan 1001 to 1003 2001 to 2003
[PE_A-Twenty-FiveGigE1/0/3] quit
# 创建CVLAN 10～40。
<PE_B> system-view
[PE_B] vlan 10 to 40
# 创建SVLAN 1001～1003、SVLAN 2001～2003。
[PE_B] vlan 1001 to 1003
[PE_B] vlan 2001 to 2003
(1) Twenty-FiveGigE1/0/1端口的配置
# 配置端口为Hybrid端口。
[PE_B] interface twenty-fivegige 1/0/1
[PE_B-Twenty-FiveGigE1/0/1] port link-type hybrid
# 配置端口允许CVLAN 15～40的报文携带VLAN Tag通过。
[PE_B-Twenty-FiveGigE1/0/1] port hybrid vlan 15 to 40 tagged
# 配置端口允许SVLAN 2001～2003的报文通过，并且在发送时去掉外层Tag。
[PE_B-Twenty-FiveGigE1/0/1] port hybrid vlan 2001 to 2003 untagged
# 配置端口取消允许VLAN 1通过。
[PE_B-Twenty-FiveGigE1/0/1] undo port hybrid vlan 1
# 配置1:2 VLAN映射功能，为用户网络VLAN 15～25的报文封装VLAN 2001的外层VLAN Tag，为用户网络VLAN 26～35的报文封装VLAN 2002的外层VLAN Tag，为用户网络VLAN 36～40的报文封装VLAN 2003的外层VLAN Tag。
[PE_B-Twenty-FiveGigE1/0/1] vlan mapping nest range 15 to 25 nested-vlan 2001
[PE_B-Twenty-FiveGigE1/0/1] vlan mapping nest range 26 to 35 nested-vlan 2002
[PE_B-Twenty-FiveGigE1/0/1] vlan mapping nest range 36 to 40 nested-vlan 2003
# 配置端口信任报文的802.1p优先级。
[PE_B-Twenty-FiveGigE1/0/1] qos trust dot1p
[PE_B-Twenty-FiveGigE1/0/1] quit
(2) Twenty-FiveGigE1/0/2端口的配置
# 配置端口为Hybrid端口。
[PE_B] interface twenty-fivegige 1/0/2
[PE_B-Twenty-FiveGigE1/0/2] port link-type hybrid
# 配置端口允许CVLAN 10～40的报文携带VLAN Tag通过。
[PE_B-Twenty-FiveGigE1/0/2] port hybrid vlan 10 to 40 tagged
# 配置端口允许SVLAN 1001～1003的报文通过，并且在发送时去掉外层Tag。
[PE_B-Twenty-FiveGigE1/0/2] port hybrid vlan 1001 to 1003 untagged
# 配置端口取消允许VLAN 1通过。
[PE_B-Twenty-FiveGigE1/0/2] undo port hybrid vlan 1
# 配置1:2 VLAN映射功能，为用户网络VLAN 10～20的报文封装VLAN 1001的外层VLAN Tag，为用户网络VLAN 21～30的报文封装VLAN 1002的外层VLAN Tag，为用户网络VLAN 31～40的报文封装VLAN 1003的外层VLAN Tag。
[PE_B-Twenty-FiveGigE1/0/2] vlan mapping nest range 10 to 20 nested-vlan 1001
[PE_B-Twenty-FiveGigE1/0/2] vlan mapping nest range 21 to 30 nested-vlan 1002
[PE_B-Twenty-FiveGigE1/0/2] vlan mapping nest range 31 to 40 nested-vlan 1003
# 配置端口信任报文的802.1p优先级。
[PE_B-Twenty-FiveGigE1/0/2] qos trust dot1p
[PE_B-Twenty-FiveGigE1/0/2] quit
(3) Twenty-FiveGigE1/0/3端口的配置
# 配置端口为Trunk端口，且允许VLAN 1001～1003和VLAN 2001～2003的报文通过，取消允许VLAN 1通过。
[PE_B] interface twenty-fivegige 1/0/3
[PE_B-Twenty-FiveGigE1/0/3] port link-type trunk
[PE_B-Twenty-FiveGigE1/0/3] undo port trunk permit vlan 1
[PE_B-Twenty-FiveGigE1/0/3] port trunk permit vlan 1001 to 1003 2001 to 2003
[PE_B-Twenty-FiveGigE1/0/3] quit
配置运营商网络中PE A到PE B之间的路径上的设备端口都允许VLAN 1001～1003和VLAN 2001～2003的报文携带VLAN Tag通过，并配置各端口的MTU值至少为1504字节。
(1) 查看PE A上和PE B上VLAN映射的配置信息。
[PE_A] display vlan mapping
Interface Twenty-FiveGigE1/0/1:
Outer VLAN Inner VLAN Translated Outer VLAN Translated Inner VLAN
10-20 N/A 1001 10-20
21-30 N/A 1002 21-30
31-40 N/A 1003 31-40
Interface Twenty-FiveGigE1/0/2:
Outer VLAN Inner VLAN Translated Outer VLAN Translated Inner VLAN
15-25 N/A 2001 15-25
26-35 N/A 2002 26-35
36-40 N/A 2003 36-40
[PE_B] display vlan mapping
Interface Twenty-FiveGigE1/0/1:
Outer VLAN Inner VLAN Translated Outer VLAN Translated Inner VLAN
15-25 N/A 2001 15-25
26-35 N/A 2002 26-35
36-40 N/A 2003 36-40
Interface Twenty-FiveGigE1/0/2:
Outer VLAN Inner VLAN Translated Outer VLAN Translated Inner VLAN
10-20 N/A 1001 10-20
21-30 N/A 1002 21-30
31-40 N/A 1003 31-40
显示信息表明1:2 VLAN映射的配置正确。
(2) Customer A中跨越运营商网络的两个分支机构中处于同一CVLAN的两台PC互相进行Ping操作，可以Ping通，且这两台PC能够互相学习到对方的MAC地址。可见CVLAN信息能够跨越运营商网络进行透明传输。Customer B中的情况同理。
(3) Customer A和Customer B中处于同一CVLAN（例如VLAN 30）中的两台PC互相进行Ping操作。在其中一台PC上查看ARP表项，发现它没有学到对方的MAC地址。可见不同公司中同一CVLAN的流量被二层隔离。
· PE A
#
vlan 10 to 40
#
vlan 1001 to 1003
#
vlan 2001 to 2003
#
interface Twenty-FiveGigE1/0/1
port link-type hybrid
undo port hybrid vlan 1
port hybrid vlan 10 to 40 tagged
port hybrid vlan 1001 to 1003 untagged
vlan mapping nest range 10 to 20 nested-vlan 1001
vlan mapping nest range 21 to 30 nested-vlan 1002
vlan mapping nest range 31 to 40 nested-vlan 1003
qos trust dot1p
#
interface Twenty-FiveGigE1/0/2
port link-type hybrid
undo port hybrid vlan 1
port hybrid vlan 15 to 40 tagged
port hybrid vlan 2001 to 2003 untagged
vlan mapping nest range 15 to 25 nested-vlan 2001
vlan mapping nest range 26 to 35 nested-vlan 2002
vlan mapping nest range 36 to 40 nested-vlan 2003
qos trust dot1p
#
interface Twenty-FiveGigE1/0/3
port link-type trunk
undo port trunk permit vlan 1
port trunk permit vlan 1001 to 1003 2001 to 2003
#
· PE B
#
vlan 10 to 40
#
vlan 1001 to 1003
#
vlan 2001 to 2003
#
interface Twenty-FiveGigE1/0/1
port link-type hybrid
undo port hybrid vlan 1
port hybrid vlan 15 to 40 tagged
port hybrid vlan 2001 to 2003 untagged
vlan mapping nest range 15 to 25 nested-vlan 2001
vlan mapping nest range 26 to 35 nested-vlan 2002
vlan mapping nest range 36 to 40 nested-vlan 2003
qos trust dot1p
#
interface Twenty-FiveGigE1/0/2
port link-type hybrid
undo port hybrid vlan 1
port hybrid vlan 10 to 40 tagged
port hybrid vlan 1001 to 1003 untagged
vlan mapping nest range 10 to 20 nested-vlan 1001
vlan mapping nest range 21 to 30 nested-vlan 1002
vlan mapping nest range 31 to 40 nested-vlan 1003
qos trust dot1p
#
interface Twenty-FiveGigE1/0/3
port link-type trunk
undo port trunk permit vlan 1
port trunk permit vlan 1001 to 1003 2001 to 2003
#
如图6所示：在某小区，服务提供商为每个家庭都提供了PC、VoD和VoIP这三种数据服务，每个家庭都通过各自的家庭网关接入楼道交换机，每个家庭网关都分别将PC、VoD和VoIP业务依次划分到VLAN 1～3。
现要求在楼道交换机上通过配置1:1VLAN映射功能，实现将每个家庭的每种业务都划分到不同的VLAN，以隔离不同家庭的同类业务。
图6 1:1 VLAN映射组网示意图
表6 适用产品及版本
|
产品 |
软件版本 |
|
S6550X-HI系列 |
Release 1213P01及以上版本 |
|
S6880系列 |
Release 1213P01及以上版本 |
|
S9820-8M |
Release 1213P01及以上版本 |
|
S5580X-HI系列 |
Release 1213P01及以上版本 |
|
S5580X-EI系列 |
Release 1213P01及以上版本 |
|
S5580S-EI系列 |
Release 1213P01及以上版本 |
# 创建原始VLAN——VLAN 2～ 3（原始VLAN 1设备缺省已创建）。
<SwitchA> system-view
[SwitchA] vlan 2 to 3
# 创建转换后VLAN——VLAN 101～102、VLAN 201～202和VLAN 301～302。
[SwitchA] vlan 101 to 102
[SwitchA] vlan 201 to 202
[SwitchA] vlan 301 to 302
# 配置下行端口Twenty-FiveGigE1/0/1为Trunk端口且允许原始VLAN及转换后VLAN通过。
[SwitchA] interface twenty-fivegige 1/0/1
[SwitchA-Twenty-FiveGigE1/0/1] port link-type trunk
[SwitchA-Twenty-FiveGigE1/0/1] port trunk permit vlan 1 2 3 101 201 301
# 在端口Twenty-FiveGigE1/0/1上配置1:1 VLAN映射功能，将VLAN 1的Tag替换为VLAN 101的Tag，将VLAN 2的Tag替换为VLAN 201的Tag，将VLAN 3的Tag替换为VLAN 301的Tag。
[SwitchA-Twenty-FiveGigE1/0/1] vlan mapping 1 translated-vlan 101
[SwitchA-Twenty-FiveGigE1/0/1] vlan mapping 2 translated-vlan 201
[SwitchA-Twenty-FiveGigE1/0/1] vlan mapping 3 translated-vlan 301
[SwitchA-Twenty-FiveGigE1/0/1] quit
# 配置下行端口Twenty-FiveGigE1/0/2为Trunk端口且允许原始VLAN及转换后VLAN通过。
[SwitchA] interface twenty-fivegige 1/0/2
[SwitchA-Twenty-FiveGigE1/0/2] port link-type trunk
[SwitchA-Twenty-FiveGigE1/0/2] port trunk permit vlan 1 2 3 102 202 302
# 在端口Twenty-FiveGigE1/0/2上配置1:1 VLAN映射功能，将VLAN 1的Tag替换为VLAN 102的Tag，将VLAN 2的Tag替换为VLAN 202的Tag，将VLAN 3的Tag替换为VLAN 302的Tag。
[SwitchA-Twenty-FiveGigE1/0/2] vlan mapping 1 translated-vlan 102
[SwitchA-Twenty-FiveGigE1/0/2] vlan mapping 2 translated-vlan 202
[SwitchA-Twenty-FiveGigE1/0/2] vlan mapping 3 translated-vlan 302
[SwitchA-Twenty-FiveGigE1/0/2] quit
# 配置上行端口Twenty-FiveGigE1/0/3为Trunk端口，且允许转换后VLAN通过。
[SwitchA] interface twenty-fivegige 1/0/3
[SwitchA-Twenty-FiveGigE1/0/3] port link-type trunk
[SwitchA-Twenty-FiveGigE1/0/3] undo port trunk permit vlan 1
[SwitchA-Twenty-FiveGigE1/0/3] port trunk permit vlan 101 201 301 102 202 302
[SwitchA-Twenty-FiveGigE1/0/3] quit
Switch B的配置与Switch A相似，配置过程略。
(1) 查看Switch A上的VLAN映射配置信息
[SwitchA] display vlan mapping
Interface twenty-fivegige1/0/1:
Outer VLAN Inner VLAN Translated Outer VLAN Translated Inner VLAN
1 N/A 101 N/A
2 N/A 201 N/A
3 N/A 301 N/A
Interface twenty-fivegige1/0/2:
Outer VLAN Inner VLAN Translated Outer VLAN Translated Inner VLAN
1 N/A 102 N/A
2 N/A 202 N/A
3 N/A 302 N/A
(2) 查看Switch B上的VLAN映射配置信息
Switch B上的VLAN映射配置信息与Switch A相似，显示信息略。
· Switch A
#
vlan 1
#
vlan 2 to 3
#
vlan 101 to 102
#
vlan 201 to 202
#
vlan 301 to 302
#
interface twenty-fivegige1/0/1
port link-type trunk
port trunk permit vlan 1 to 3 101 201 301
vlan mapping 1 translated-vlan 101
vlan mapping 2 translated-vlan 201
vlan mapping 3 translated-vlan 301
#
interface twenty-fivegige1/0/2
port link-type trunk
port trunk permit vlan 1 to 3 102 202 302
vlan mapping 1 translated-vlan 102
vlan mapping 2 translated-vlan 202
vlan mapping 3 translated-vlan 302
#
interface twenty-fivegige1/0/3
port link-type trunk
port trunk permit vlan 1 101 to 102 201 to 202 301 to 302
#
· Switch B
#
vlan 1
#
vlan 2 to 3
#
vlan 103 to 104
#
vlan 203 to 204
#
vlan 303 to 304
#
interface twenty-fivegige1/0/1
port link-type trunk
port trunk permit vlan 1 to 3 103 203 303
vlan mapping 1 translated-vlan 103
vlan mapping 2 translated-vlan 203
vlan mapping 3 translated-vlan 303
#
interface twenty-fivegige1/0/2
port link-type trunk
port trunk permit vlan 1 to 3 104 204 304
vlan mapping 1 translated-vlan 104
vlan mapping 2 translated-vlan 204
vlan mapping 3 translated-vlan 304
#
interface twenty-fivegige1/0/3
port link-type trunk
port trunk permit vlan 1 103 to 104 203 to 204 303 to 304
#
如图7所示，楼道交换机通过划分VLAN 2～4以隔离不同家庭用户的同类业务。在园区交换机上，为了节省VLAN资源，通过N:1 VLAN映射，将不同家庭用户的同类业务都划分到相同的VLAN，即将所有家庭用户的同类业务都映射到VLAN 10处理。
图7 N:1 VLAN映射典型配置组网示意图
表7 适用产品及版本
|
产品 |
软件版本 |
|
S6550X-HI系列 |
Release 1213P01及以上版本 |
|
S6880系列 |
Release 1213P01及以上版本 |
|
S9820-8M |
Release 1213P01及以上版本 |
|
S5580X-HI系列 |
Release 1213P01及以上版本 |
|
S5580X-EI系列 |
Release 1213P01及以上版本 |
|
S5580S-EI系列 |
Release 1213P01及以上版本 |
# 创建原始VLAN——VLAN 2。
<SwitchA> system-view
[SwitchA] vlan 2
# 配置端口Twenty-FiveGigE1/0/1和Twenty-FiveGigE1/0/1加入VLAN 2。
[SwitchA] interface range twenty-fivegige 1/0/1 to twenty-fivegige 1/0/2
[SwitchA-if-range] port access vlan 2
Switch B和Switch C的配置与Switch A相似，配置过程略。
# 创建原始VLAN——VLAN 2～4.
[SwitchD] vlan 2 to 4
# 配置端口Twenty-FiveGigE1/0/1加入VLAN 2，Twenty-FiveGigE1/0/2加入VLAN 3，Twenty-FiveGigE1/0/3加入VLAN 4。
[SwitchD] interface ten-twenty-fivegige 1/0/1
[SwitchD-Twenty-FiveGigE1/0/1] port access vlan 2
[SwitchD-Twenty-FiveGigE1/0/1] quit
[SwitchD] interface ten-twenty-fivegige 1/0/2
[SwitchD-Twenty-FiveGigE1/0/2] port access vlan 3
[SwitchD-Twenty-FiveGigE1/0/2] quit
[SwitchD] interface ten-twenty-fivegige 1/0/3
[SwitchD-Twenty-FiveGigE1/0/3] port access vlan 4
[SwitchD-Twenty-FiveGigE1/0/3] quit
# 配置端口Twenty-FiveGigE1/0/4为Trunk端口并允许原始VLAN通过。
[SwitchD] interface ten-twenty-fivegige 1/0/4
[SwitchD-Twenty-FiveGigE1/0/4] port link-type trunk
[SwitchD-Twenty-FiveGigE1/0/4] port trunk permit vlan 2 to 4
# 配置下行端口Twenty-FiveGigE1/0/1为Trunk端口且允许原始VLAN通过。
[SwitchE] interface ten-twenty-fivegige 1/0/1
[SwitchE-Twenty-FiveGigE1/0/1] port link-type trunk
[SwitchE-Twenty-FiveGigE1/0/1] port trunk permit vlan 2 to 4
# 在端口Twenty-FiveGigE1/0/1上配置N:1 VLAN映射，将VLAN 2～4的Tag替换为VLAN 10的Tag。
[SwitchE-Twenty-FiveGigE1/0/1] vlan mapping uni range 2 to 4 translated-vlan 10
# 查看Switch E上的VLAN映射配置信息。
[SwitchE] display vlan mapping
Interface Twenty-FiveGigE1/0/1:
Outer VLAN Inner VLAN Translated Outer VLAN Translated Inner VLAN
2-4 N/A 10 N/A
以上信息表明，Switch E上的N:1 VLAN映射配置成功。
· Switch A
#
vlan 1
#
vlan 2
#
interface Twenty-FiveGigE1/0/1
port link-mode bridge
port access vlan 2
#
interface Twenty-FiveGigE1/0/2
port link-mode bridge
port access vlan 2
#
· Switch B
#
vlan 1
#
vlan 3
#
interface Twenty-FiveGigE1/0/1
port link-mode bridge
port access vlan 3
#
interface Twenty-FiveGigE1/0/2
port link-mode bridge
port access vlan 3
#
· Switch C
#
vlan 1
#
vlan 4
#
interface Twenty-FiveGigE1/0/1
port link-mode bridge
port access vlan 4
#
interface Twenty-FiveGigE1/0/2
port link-mode bridge
port access vlan 4
#
· Switch D
#
vlan 1
#
vlan 2 to 4
#
interface Twenty-FiveGigE1/0/1
port link-mode bridge
port access vlan 2
#
interface Twenty-FiveGigE1/0/2
port link-mode bridge
port access vlan 3
#
interface Twenty-FiveGigE1/0/3
port link-mode bridge
port access vlan 4
#
interface Twenty-FiveGigE1/0/4
port link-mode bridge
port link-type trunk
port trunk permit vlan 1 to 4
#
· Switch E
#
vlan 1
#
vlan 2 to 4
#
interface Twenty-FiveGigE1/0/1
port link-mode bridge
port link-type trunk
port trunk permit vlan 1 to 4
vlan mapping uni range 2 to 4 translated-vlan 10
#
如图8所示，Site 1和Site 2是同一家公司的两个分支机构，同属于VLAN 10，通过运营商A提供的VPN接入服务，外层VLAN Tag为VLAN 100。当该公司被另一家公司收购之后，需要Site 1和Site 2接入新公司的网络。新公司的VPN服务由运营商B提供，外层VLAN Tag为VLAN 200，总部中能够为Site 1和Site 2提供服务的业务VLAN为VLAN 30。
现要求通过配置2:2 VLAN映射功能，在不改变Site 1、Site 2和运营商网络VLAN的配置的情况下，使Site 1和Site 2能够访问总部（Headquarts）VLAN 30的资源。
图8 2:2 VLAN映射典型配置组网示意图
表8 适用产品及版本
|
产品 |
软件版本 |
|
S6550X-HI系列 |
Release 1213P01及以上版本 |
|
S6880系列 |
Release 1213P01及以上版本 |
|
S9820-8M |
Release 1213P01及以上版本 |
|
S5580X-HI系列 |
Release 1213P01及以上版本 |
|
S5580X-EI系列 |
Release 1213P01及以上版本 |
|
S5580S-EI系列 |
Release 1213P01及以上版本 |
2:2 VLAN映射功能只需要在两个运营商的边缘设备中的其中一台上配置即可，本例中我们以在Switch C上配置为例进行介绍。
# 创建VLAN 10和VLAN 100。
<SwitchA> system-view
[SwitchA] vlan 10
[SwitchA-vlan10] quit
[SwitchA] vlan 100
[SwitchA-vlan100] quit
# 在下行端口Twenty-FiveGigE1/0/1上配置1:2 VLAN映射，为VLAN 10报文添加VLAN 100的外层VLAN Tag。
[SwitchA] interface twenty-fivegige 1/0/1
[SwitchA-Twenty-FiveGigE1/0/1] vlan mapping nest single 10 nested-vlan 100
# 配置Twenty-FiveGigE1/0/1为Hybrid端口且允许VLAN 10的报文携带VLAN Tag通过、VLAN 100的报文不携带VLAN Tag通过，取消允许VLAN 1通过。
[SwitchA-Twenty-FiveGigE1/0/1] port link-type hybrid
[SwitchA-Twenty-FiveGigE1/0/1] port hybrid vlan 10 tagged
[SwitchA-Twenty-FiveGigE1/0/1] port hybrid vlan 100 untagged
[SwitchA-Twenty-FiveGigE1/0/1] undo port hybrid vlan 1
[SwitchA-Twenty-FiveGigE1/0/1] quit
# 配置上行端口Twenty-FiveGigE1/0/2允许VLAN 100的报文通过，取消允许VLAN 1通过。
[SwitchA] interface twenty-fivegige 1/0/2
[SwitchA-Twenty-FiveGigE1/0/2] port link-type trunk
[SwitchA-Twenty-FiveGigE1/0/2] port trunk permit vlan 100
[SwitchA-Twenty-FiveGigE1/0/2] undo port trunk permit vlan 1
[SwitchA-Twenty-FiveGigE1/0/2] quit
# 创建VLAN 10和VLAN 100。
<SwitchB> system-view
[SwitchB] vlan 10
[SwitchB-vlan10] quit
[SwitchB] vlan 100
[SwitchB-vlan100] quit
# 在下行端口Twenty-FiveGigE1/0/3上配置1:2 VLAN映射，为VLAN 10报文添加VLAN 100的外层VLAN Tag。
[SwitchB] interface twenty-fivegige 1/0/3
[SwitchB-Twenty-FiveGigE1/0/3] vlan mapping nest single 10 nested-vlan 100
# 配置Twenty-FiveGigE1/0/3为Hybrid端口且允许VLAN 10的报文携带VLAN Tag通过、VLAN100的报文不携带VLAN Tag通过，取消允许VLAN 1通过。
[SwitchB-Twenty-FiveGigE1/0/3] port link-type hybrid
[SwitchB-Twenty-FiveGigE1/0/3] port hybrid vlan 10 tagged
[SwitchB-Twenty-FiveGigE1/0/3] port hybrid vlan 100 untagged
[SwitchB-Twenty-FiveGigE1/0/3] undo port hybrid vlan 1
[SwitchB-Twenty-FiveGigE1/0/3] quit
# 配置端口Twenty-FiveGigE1/0/1允许VLAN 100的报文通过，取消允许VLAN 1通过。
[SwitchB] interface twenty-fivegige 1/0/1
[SwitchB-Twenty-FiveGigE1/0/1] port link-type trunk
[SwitchB-Twenty-FiveGigE1/0/1] port trunk permit vlan 100
[SwitchB-Twenty-FiveGigE1/0/1] undo port trunk permit vlan 1
[SwitchB-Twenty-FiveGigE1/0/1] quit
# 配置端口Twenty-FiveGigE1/0/2允许VLAN 100的报文通过，取消允许VLAN 1通过。
[SwitchB] interface twenty-fivegige 1/0/2
[SwitchB-Twenty-FiveGigE1/0/2] port link-type trunk
[SwitchB-Twenty-FiveGigE1/0/2] port trunk permit vlan 100
[SwitchB-Twenty-FiveGigE1/0/2] undo port trunk permit vlan 1
[SwitchB-Twenty-FiveGigE1/0/2] quit
# 创建映射前外层VLAN 100和映射后外层VLAN 200。
<SwitchC> system-view
[SwitchC] vlan 100
[SwitchC-vlan100] quit
[SwitchC] vlan 200
[SwitchC-vlan200] quit
# 配置端口Twenty-FiveGigE1/0/1允许VLAN 100和VLAN 200的报文通过，取消允许VLAN 1通过。
[SwitchC] interface twenty-fivegige 1/0/1
[SwitchC-Twenty-FiveGigE1/0/1] port link-type trunk
[SwitchC-Twenty-FiveGigE1/0/1] port trunk permit vlan 100 200
[SwitchC-Twenty-FiveGigE1/0/1] undo port trunk permit vlan 1
# 在端口Twenty-FiveGigE1/0/1上配置2:2 VLAN映射，将外层VLAN为100、内层VLAN为10的报文的VLAN ID转换为外层VLAN为200、内层VLAN为30。
[SwitchC-Twenty-FiveGigE1/0/1] vlan mapping tunnel 100 10 translated-vlan 200 30
[SwitchC-Twenty-FiveGigE1/0/1] quit
# 配置端口Twenty-FiveGigE1/0/2允许VLAN 200的报文通过。
[SwitchC] interface twenty-fivegige 1/0/2
[SwitchC-Twenty-FiveGigE1/0/2] port link-type trunk
[SwitchC-Twenty-FiveGigE1/0/2] port trunk permit vlan 200
[SwitchC-Twenty-FiveGigE1/0/2] undo port trunk permit vlan 1
[SwitchC-Twenty-FiveGigE1/0/2] quit
# 创建VLAN 30和VLAN 200。
<SwitchD> system-view
[SwitchD] vlan 30
[SwitchD-vlan30] quit
[SwitchD] vlan 200
[SwitchD-vlan200] quit
# 配置端口Twenty-FiveGigE1/0/1允许VLAN 200的报文通过，取消允许VLAN 1通过。
[SwitchD] interface twenty-fivegige 1/0/1
[SwitchD-Twenty-FiveGigE1/0/1] port link-type trunk
[SwitchD-Twenty-FiveGigE1/0/1] port trunk permit vlan 200
[SwitchD-Twenty-FiveGigE1/0/1] undo port trunk permit vlan 1
[SwitchD-Twenty-FiveGigE1/0/1] quit
# 配置Twenty-FiveGigE1/0/2为Hybrid端口且允许VLAN 30的报文携带VLAN Tag通过、VLAN 200的报文不携带VLAN Tag通过，取消允许VLAN 1通过。
[SwitchD] interface twenty-fivegige 1/0/2
[SwitchD-Twenty-FiveGigE1/0/2] port link-type hybrid
[SwitchD-Twenty-FiveGigE1/0/2] port hybrid vlan 30 tagged
[SwitchD-Twenty-FiveGigE1/0/2] port hybrid vlan 200 untagged
[SwitchD-Twenty-FiveGigE1/0/2] undo port hybrid vlan 1
# 在端口Twenty-FiveGigE1/0/2上配置1:2 VLAN映射，为VLAN 30报文添加VLAN 200的外层VLAN Tag。
[SwitchD-Twenty-FiveGigE1/0/2] vlan mapping nest single 30 nested-vlan 200
[SwitchD-Twenty-FiveGigE1/0/2] quit
# 查看Switch C上的VLAN映射配置信息。
[SwitchC] display vlan mapping
Interface Twenty-FiveGigE1/0/1:
Outer VLAN Inner VLAN Translated Outer VLAN Translated Inner VLAN
100 10 200 30
显示信息表明2:2 VLAN映射已经正确配置。
· Switch A
#
vlan 10
vlan 100
#
interface Twenty-FiveGigE1/0/1
port link-type hybrid
port hybrid vlan 10 tagged
port hybrid vlan 100 untagged
vlan mapping nest single 10 nested-vlan 100
#
interface Twenty-FiveGigE1/0/2
port link-type trunk
undo port trunk permit vlan 1
port trunk permit vlan 100
· Switch B
#
vlan 10
vlan 100
#
interface Twenty-FiveGigE1/0/1
port link-type trunk
undo port trunk permit vlan 1
port trunk permit vlan 100
#
interface Twenty-FiveGigE1/0/2
port link-type trunk
undo port trunk permit vlan 1
port trunk permit vlan 100
#
interface Twenty-FiveGigE1/0/3
port link-type hybrid
port hybrid vlan 10 tagged
port hybrid vlan 100 untagged
vlan mapping nest single 10 nested-vlan 100
#
vlan 100
#
vlan 200
#
interface Twenty-FiveGigE1/0/1
port link-type trunk
undo port trunk permit vlan 1
port trunk permit vlan 100 200
vlan mapping tunnel 100 10 translated-vlan 200 30
#
interface Twenty-FiveGigE1/0/2
port link-type trunk
undo port trunk permit vlan 1
port trunk permit vlan 200
#
· Switch D
#
vlan 30
vlan 200
#
interface Twenty-FiveGigE1/0/1
port link-type trunk
undo port trunk permit vlan 1
port trunk permit vlan 200
#
interface Twenty-FiveGigE1/0/2
port link-type hybrid
port hybrid vlan 30 tagged
port hybrid vlan 200 untagged
vlan mapping nest single 30 nested-vlan 200
#
不同款型规格的资料略有差异, 详细信息请向具体销售和400咨询。H3C保留在没有任何通知或提示的情况下对资料内容进行修改的权利!
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