一、MPLS 介绍
多协议标签交换(Multi-Protocol Label Switching,MPLS)是新一代的IP高速骨干网络交换标准,由因特网工程任务组(Internet Engineering Task Force,IETF)提出。
具体细节查看 百度百科 MPLS MPLS LDP 使用组播发送Hello包的方式进行邻居关系建立,组播地址:224.0.0.2。
建立连接通过UDP发送Hello包,而且在Hello包里面,包含了发送方的LSR ID。所以在 dis mpls ldp peer 中会看到对端 LSR ID的地址。
二、背景需求
A机房部分业务由于历史原因,改动IP网段比较麻烦,要在中间跑着三层路由协议(ospf)的B机房实现业务备份,需要将A机房IP网段(192.168.10.x\192.168.20.x\192.168.30.x)透传之B机房使用。
三、实验拓扑
四、配置
1、基本配置:
6800-A:
interface LoopBack0
ip address 192.168.1.252255.255.255.
#
interface Vlan-interface5
ip address 10.0.0.5 255.255.255.252
#
interface Vlan-interface10
ip address 192.168.10.1 255.255.255.0
#
interface Vlan-interface20
ip address 192.168.20.1 255.255.255.0
#
interface GigabitEthernet0/
port link-mode route
port link-type trunk
undo port trunk permit vlan
port trunk permit vlan
5800-A:
interface LoopBack0
ip address 192.168.1.254 255.255.255.255
#
interface Vlan-interface5
ip address 10.0.0.6 255.255.255.252
#
interface GigabitEthernet0/
port link-mode route
ip address 10.0.0.2 255.255.255.252
#
interface GigabitEthernet0/
port link-type trunk
undo port trunk permit vlan
port trunk permit vlan
5800-B:
interface LoopBack0
ip address 192.168.1.253 255.255.255.255
#
interface Vlan-interface5
ip address 10.0.0.10 255.255.255.252
#
interface GigabitEthernet0/
port link-mode route
ip address 10.0.0.3 255.255.255.252
#
interface GigabitEthernet0/
port link-type trunk
undo port trunk permit vlan
port trunk permit vlan
6800-B:
interface LoopBack0
ip address 192.168.1.251 255.255.255.255
#
interface Vlan-interface5
ip address 10.0.0.9 255.255.255.252
#
interface GigabitEthernet0/
port link-mode route
port link-type trunk
undo port trunk permit vlan
port trunk permit vlan
2、ospf 路由配置
6800-A:
ospf router-id 192.168.1.252
area 0.0.0.10
network 10.0.0.5 0.0.0.0
network 192.168.1.252 0.0.0.0
5800-A:
ospf router-id 192.168.1.254
area 0.0.0.0
network 10.0.0.2 0.0.0.0
network 192.168.1.254 0.0.0.0
area 0.0.0.10
network 10.0.0.6 0.0.0.0
5800-B:
ospf router-id 192.168.1.253
area 0.0.0.0
network 10.0.0.3 0.0.0.0
network 192.168.1.253 0.0.0.0
area 0.0.0.20
network 10.0.0.10 0.0.0.0
6800-B:
ospf router-id 192.168.1.251
area 0.0.0.20
network 10.0.0.9 0.0.0.0
network 192.168.1.251 0.0.0.0
3、ospf 配置完成,并成功之后,配置 MPLS LDP 隧道。
5800-A:
mpls lsr-id 192.168..254mpls #开启mpls 功能
mpls ldp #定义mpls 模式
l2vpn
mpls l2vpn #定义vpn封装模式,只开启隧道,不用配置最后这两条命令。
interface GigabitEthernet0/
mpls
mpls ldp #在接口下应用 mpls ldp
5800-B:
mpls lsr-id 192.168.1.253mpls
mpls ldp
l2vpn
mpls l2vpn
interface GigabitEthernet0/
mpls
mpls ldp
结果:(注意:隧道有可能单方面建立成功。所以要两边查看,结果是否和实验结果类似)
[H3C 5800-A]dis mpls ldp peer
LDP Peer Information in Public network
Total number of peers: 1
------------------------------------------------------------------------------
Peer-ID Transport-Address Discovery-Source
------------------------------------------------------------------------------
192.168.1.253:0 192.168.1.253 GigabitEthernet0/27
------------------------------------------------------------------------------
[H3C 5800-A]
4、二层网络透传
5800-A:
、创建vsi
#
vsi 10A_to_B static
pwsignal ldp
vsi-id #vsi-id 不可以一样,一个vlan 一个vsi-id,两段对应网段的vsi-id 需要一致。
peer 192.168.1.253 #对端lsr-id
#
vsi 20A_to_B static
pwsignal ldp
vsi-id
peer 192.168.1.253
#
2、接口应用
interface GigabitEthernet0/
service-instance
encapsulation s-vid #透传网段vlan ID
xconnect vsi 10A_to_B
service-instance
encapsulation s-vid
xconnect vsi 20A_to_B #应用vsi
5800-B:
、创建vsi
#
vsi 10B_to_A static
pwsignal ldp
vsi-id
peer 192.168.1.
#
vsi 20B_to_A static
pwsignal ldp
vsi-id
peer 192.168.1.
#
、接口应用
interface GigabitEthernet0/
service-instance
encapsulation s-vid
xconnect vsi 10B_to_A
service-instance
encapsulation s-vid
xconnect vsi 20B_to_A
6800-B:
在交换机上创建vlan 10 和vlan20,配置现有地址进行测试,看看地址在6800A上是否可以ping同。