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MSR系列路由器MPLS HoVPN配置

 

关键词：MSR;MPLS;BGP;HoVPN

 

一、组网需求：

UPE、SPE和PEB是VPN站点接入路由器。UPE、PEB和SPE建立MP-IBGP连接。

设备清单：MSR系列路由器3台

二、组网图：

三、配置步骤：

设备和版本：MSR系列、Version 5.20, Release 1509

UPE配置

#

router id 3.3.3.3

#

ip vpn-instance vpna

route-distinguisher 3:1

vpn-target 1:1 export-extcommunity

vpn-target 1:1 import-extcommunity

#

mpls lsr-id 3.3.3.3

#

mpls

#

mpls ldp

#

interface Ethernet0/0

port link-mode route

ip address 1.3.0.3 255.255.255.0

mpls

mpls ldp

#

interface Ethernet0/1

 port link-mode route

ip binding vpn-instance vpna

ip address 192.168.1.1 255.255.255.0

#

interface LoopBack0

ip address 3.3.3.3 255.255.255.255

#

bgp 1

undo synchronization

peer 1.1.1.1 as-number 1

peer 1.1.1.1 connect-interface LoopBack0

#

ipv4-family vpnv4

peer 1.1.1.1 enable

#

ipv4-family vpn-instance vpna

import-route direct

#

ospf 1

area 0.0.0.0

network 3.3.3.3 0.0.0.0

network 1.3.0.0 0.0.0.255

#

SPE配置：

#

router id 1.1.1.1

#

ip vpn-instance vpna

route-distinguisher 1:1

vpn-target 1:1 export-extcommunity

vpn-target 1:1 import-extcommunity

#

mpls lsr-id 1.1.1.1

#

mpls

#

mpls ldp

#

interface Ethernet0/0

port link-mode route

ip address 1.2.0.1 255.255.255.0

mpls

mpls ldp

#

interface Ethernet0/1

port link-mode route

ip address 1.3.0.1 255.255.255.0

mpls

mpls ldp

#

interface Ethernet1/0

port link-mode route

ip binding vpn-instance vpna

ip address 192.168.2.1 255.255.255.0

#

interface LoopBack0

ip address 1.1.1.1 255.255.255.255

#

bgp 1

undo synchronization

group 1 internal

peer 1 connect-interface LoopBack0

peer 2.2.2.2 group 1

peer 3.3.3.3 group 1

#

ipv4-family vpnv4

peer 1 enable

peer 2.2.2.2 enable

peer 2.2.2.2 group 1

peer 3.3.3.3 enable

peer 3.3.3.3 group 1

peer 3.3.3.3 upe     //指定UPE为upe，及生成pna默认路由

peer 3.3.3.3 default-route-advertise vpn-instance vpna

#

ipv4-family vpn-instance vpna

network 192.168.2.0 255.255.255.0

#

ospf 1

area 0.0.0.0

network 1.1.1.1 0.0.0.0

network 1.3.0.0 0.0.0.255

network 1.2.0.0 0.0.0.255

#

PEB配置

#

router id 2.2.2.2

#

ip vpn-instance vpna

route-distinguisher 2:1

vpn-target 1:1 export-extcommunity

vpn-target 1:1 import-extcommunity

#

mpls lsr-id 2.2.2.2

#

mpls

#

mpls ldp

#

interface Ethernet0/0

port link-mode route

ip address 1.2.0.2 255.255.255.0

mpls

mpls ldp

#

interface Ethernet0/1

port link-mode route

ip binding vpn-instance vpna

ip address 192.168.3.1 255.255.255.0

#

interface LoopBack0

ip address 2.2.2.2 255.255.255.255

#

bgp 1

undo synchronization

peer 1.1.1.1 as-number 1

peer 1.1.1.1 connect-interface LoopBack0

#

ipv4-family vpnv4

peer 1.1.1.1 enable

#

ipv4-family vpn-instance vpna

network 2.1.1.1 255.255.255.255

#

ospf 1

area 0.0.0.0

network 2.2.2.2 0.0.0.0

network 1.2.0.0 0.0.0.255

#

四、配置关键点：

在MPLS L3VPN基本配置正确的基础上，配置主要在SPE上指定upe和发布默认路由。

五、实验分析

在UPE和PEB上检查vpn路由及其标签。

UPE上查看vpn路由，注意默认路由：

<UPE>dis bg v a r

BGP Local router ID is 3.3.3.3

Total number of routes from all PE: 1

Route Distinguisher: 1:1

Network            NextHop         In/Out Label     MED        LocPrf

*>i 0.0.0.0            1.1.1.1         NULL/1032                   100

Total routes of vpn-instance vpna: 2

Network            NextHop         In/Out Label     MED        LocPrf

*>i 0.0.0.0            1.1.1.1         NULL/1032                   100

*>  3.1.1.1/32         0.0.0.0         1025/NULL        0

PEB上查看vpn路由情况：

<PEB>dis bgp vpnv4 vpn-instance vpna routing-table

 

Total Number of Routes: 3

 

BGP Local router ID is 2.2.2.2

Status codes: * - valid, > - best, d - damped,

h - history,  i - internal, s - suppressed, S - Stale

Origin : i - IGP, e - EGP, ? - incomplete

Network            NextHop         MED        LocPrf     PrefVal Path/Ogn

*>i 1.0.0.1/32         1.1.1.1         0          100        0       i

*>  2.1.1.1/32         0.0.0.0         0                     0       i

*>i 3.1.1.1/32         1.1.1.1         0          100        0       ?

SPE上查看vpn路由情况：

<SPE>dis bgp v a r

BGP Local router ID is 1.1.1.1

Total number of routes from all PE: 2

Route Distinguisher: 3:1

Network            NextHop         In/Out Label     MED        LocPrf

*>i 3.1.1.1/32         3.3.3.3         1031/1025        0          100

Route Distinguisher: 2:1

Network            NextHop         In/Out Label     MED        LocPrf

*>i 2.1.1.1/32         2.2.2.2         NULL/1033        0          100

Total routes of vpn-instance vpna: 3

Network            NextHop         In/Out Label     MED        LocPrf

*>  1.0.0.1/32         0.0.0.0         1029/NULL        0

*>i 2.1.1.1/32         2.2.2.2         NULL/1033        0          100

*>i 3.1.1.1/32         3.3.3.3         NULL/1025        0          100