配置基本或高级VPN-Target扩展团体属性过滤器的示例

NE40E-M2K V800R011C10 配置指南 - IP路由 02

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通过配置基本和高级VPN-Target扩展团体属性过滤器，可以对私网或VPNv4路由进行过滤。

组网需求

如图12-4，PE1和PE2之间建立MP-IBGP邻居，PE2从PE1接收到两条BGP VPNv4路由3.3.3.3/32和4.4.4.4/32，通过配置基本或高级VPN-Target扩展团体属性过滤器，对PE2接收到的VPNv4路由进行过滤，让路由4.4.4.4/32被过滤掉。

图12-4 配置基本或高级VPN-Target扩展团体属性过滤器组网图

本例中interface1分别代表GE0/1/0。

配置思路

采用如下的思路配置基本或高级VPN-Target扩展团体属性过滤器：

配置各接口的IP地址。
配置MPLS基本能力和MPLS LDP，建立MPLS LSP。
在PE上配置使能IPv4地址族VPN实例。
在PE之间配置MP-IBGP。
在PE1上配置静态路由并引入私网。
在PE2上配置基本或高级VPN-Target扩展团体属性过滤器，两者配置其中之一即可。
在PE2上配置Route-Policy。
在PE2上配置BGP路由接收时应用Route-Policy。

数据准备

为完成此配置例，需准备如下数据：

VPN实例名称vpna、vpnb和vpnc。
基本VPN-Target扩展团体属性过滤器号1和高级VPN-Target扩展团体属性过滤器名称test。

操作步骤

配置各接口的IP地址，具体配置请参见配置文件。

配置MPLS基本能力和MPLS LDP，建立MPLS LSP。

# 配置PE1。

[~PE1] mpls lsr-id 1.1.1.1

[*PE1] mpls

[*PE1-mpls] commit

[~PE1-mpls] quit

[~PE1] mpls ldp

[*PE1-mpls-ldp] commit

[~PE1-mpls-ldp] quit

[~PE1] interface gigabitethernet 0/1/0

[~PE1-GigabitEthernet0/1/0] mpls

[*PE1-GigabitEthernet0/1/0] mpls ldp

[*PE1-GigabitEthernet0/1/0] commit

[~PE1-GigabitEthernet0/1/0] quit

# 配置PE2。

[~PE2] mpls lsr-id 2.2.2.2

[*PE2] mpls

[*PE2-mpls] commit

[~PE2-mpls] quit

[~PE2] mpls ldp

[*PE2-mpls-ldp] commit

[~PE2-mpls-ldp] quit

[~PE2] interface gigabitethernet 0/1/0

[~PE2-GigabitEthernet0/1/0] mpls

[*PE2-GigabitEthernet0/1/0] mpls ldp

[*PE2-GigabitEthernet0/1/0] commit

[~PE2-GigabitEthernet0/1/0] quit

在PE上配置使能IPv4地址族VPN实例。

# 配置PE1。

[~PE1] ip vpn-instance vpna

[*PE1-vpn-instance-vpna] ipv4-family

[*PE1-vpn-instance-vpna-af-ipv4] route-distinguisher 1:100

[*PE1-vpn-instance-vpna-af-ipv4] vpn-target 1:100 both

[*PE1-vpn-instance-vpna-af-ipv4] quit

[*PE1-vpn-instance-vpna] quit

[*PE1] ip vpn-instance vpnb

[*PE1-vpn-instance-vpnb] ipv4-family

[*PE1-vpn-instance-vpnb-af-ipv4] route-distinguisher 2:100

[*PE1-vpn-instance-vpnb-af-ipv4] vpn-target 2:100 both

[*PE1-vpn-instance-vpnb-af-ipv4] quit

[*PE1-vpn-instance-vpnb] quit

[*PE1] commit

# 配置PE2。

[~PE2] ip vpn-instance vpnc

[*PE2-vpn-instance-vpnc] ipv4-family

[*PE2-vpn-instance-vpnc-af-ipv4] route-distinguisher 1:100

[*PE2-vpn-instance-vpnc-af-ipv4] vpn-target 3:100 export-extcommunity

[*PE2-vpn-instance-vpnc-af-ipv4] vpn-target 1:100 import-extcommunity

[*PE2-vpn-instance-vpnc-af-ipv4] vpn-target 2:100 import-extcommunity

[*PE2-vpn-instance-vpnc-af-ipv4] quit

[*PE2-vpn-instance-vpnc] quit

[*PE2] commit

在PE之间配置MP-IBGP。

# 配置PE1。

[~PE1] bgp 100

[~PE1-bgp] peer 2.2.2.2 as-number 100

[*PE1-bgp] peer 2.2.2.2 connect-interface loopback 1

[*PE1-bgp] ipv4-family vpnv4

[*PE1-bgp-af-vpnv4] peer 2.2.2.2 enable

[*PE1-bgp-af-vpnv4] commit

[~PE1-bgp-af-vpnv4] quit

[~PE1-bgp] quit

# 配置PE2。

[~PE2] bgp 100

[~PE2-bgp] peer 1.1.1.1 as-number 100

[*PE2-bgp] peer 1.1.1.1 connect-interface loopback 1

[*PE2-bgp] ipv4-family vpnv4

[*PE2-bgp-af-vpnv4] peer 1.1.1.1 enable

[*PE2-bgp-af-vpnv4] commit

[~PE2-bgp-af-vpnv4] quit

[~PE2-bgp] quit

在PE1上配置静态路由并引入私网。

[~PE1] ip route-static vpn-instance vpna 3.3.3.3 32 NULL0

[*PE1] ip route-static vpn-instance vpnb 4.4.4.4 32 NULL0

[*PE1] commit

[~PE1] bgp 100

[*PE1-bgp] ipv4-family vpn-instance vpna

[*PE1-bgp-vpna] import-route static

[*PE1-bgp-vpna] quit

[*PE1-bgp] ipv4-family vpn-instance vpnb

[*PE1-bgp-vpnb] import-route static

[*PE1-bgp-vpnb] quit

[*PE1-bgp] quit

[*PE1] commit

# 在PE2上执行display bgp vpnv4 all routing-table命令查看BGP VPNv4路由信息，可以看到vpnc下收到两条路由3.3.3.3/32和4.4.4.4/32。

[~PE2] display bgp vpnv4 all routing-table 3.3.3.3

 
 BGP local router ID : 10.1.1.2
 Local AS number : 100
 
 Total routes of Route Distinguisher(1:100): 1
 BGP routing table entry information of 3.3.3.3/32:
 Label information (Received/Applied): 32905/NULL
 From: 1.1.1.1 (1.1.1.1)  
 Route Duration: 0d00h06m19s
 Relay IP Nexthop: 10.1.1.1
 Relay IP Out-Interface: GigabitEthernet0/1/0
 Relay Tunnel Out-Interface: GigabitEthernet0/1/0
 Original nexthop: 1.1.1.1
 Qos information : 0x0            
 Ext-Community: RT <1 : 100>
 AS-path Nil, origin incomplete, MED 0, localpref 100, pref-val 0, valid, internal, best, select, pre 255
 Not advertised to any peer yet
    
 VPN-Instance vpnc, Router ID 10.1.1.2:

 Total Number of Routes: 1
 BGP routing table entry information of 3.3.3.3/32:
 Route Distinguisher: 1:100
 Remote-Cross route
 Label information (Received/Applied): 32905/NULL
 From: 1.1.1.1 (1.1.1.1)  
 Route Duration: 0d00h06m19s
 Relay Tunnel Out-Interface: GigabitEthernet0/1/0
 Original nexthop: 1.1.1.1
 Qos information : 0x0            
 Ext-Community: RT <1 : 100>
 AS-path Nil, origin incomplete, MED 0, localpref 100, pref-val 0, valid, internal, best, select, pre 255
 Not advertised to any peer yet

[~PE2] display bgp vpnv4 all routing-table 4.4.4.4

 
 BGP local router ID : 10.1.1.2
 Local AS number : 100
 
 Total routes of Route Distinguisher(2:100): 1
 BGP routing table entry information of 4.4.4.4/32:
 Label information (Received/Applied): 32906/NULL
 From: 1.1.1.1 (1.1.1.1)  
 Route Duration: 0d00h06m24s
 Relay IP Nexthop: 10.1.1.1
 Relay IP Out-Interface: GigabitEthernet0/1/0
 Relay Tunnel Out-Interface: GigabitEthernet0/1/0
 Original nexthop: 1.1.1.1
 Qos information : 0x0            
 Ext-Community: RT <2 : 100>
 AS-path Nil, origin incomplete, MED 0, localpref 100, pref-val 0, valid, internal, best, select, pre 255
 Not advertised to any peer yet
    
 VPN-Instance vpnc, Router ID 10.1.1.2:

 Total Number of Routes: 1
 BGP routing table entry information of 4.4.4.4/32:
 Route Distinguisher: 2:100
 Remote-Cross route
 Label information (Received/Applied): 32906/NULL
 From: 1.1.1.1 (1.1.1.1)  
 Route Duration: 0d00h06m24s
 Relay Tunnel Out-Interface: GigabitEthernet0/1/0
 Original nexthop: 1.1.1.1
 Qos information : 0x0            
 Ext-Community: RT <2 : 100>
 AS-path Nil, origin incomplete, MED 0, localpref 100, pref-val 0, valid, internal, best, select, pre 255
 Not advertised to any peer yet

在PE2上配置基本或高级VPN-Target扩展团体属性过滤器，两者配置其中之一即可。
配置基本VPN-Target扩展团体属性过滤器。
```
[~PE2] ip extcommunity-filter 1 index 10 permit rt 1:100
```
```
[*PE2] commit
```
配置高级VPN-Target扩展团体属性过滤器。
```
[~PE2] ip extcommunity-filter advanced test index 10 permit ^1:100$
```
```
[*PE2] commit
```

在PE2上配置Route-Policy。

对于基本VPN-Target扩展团体属性过滤器：

[~PE2] route-policy test permit node 10

[*PE2-route-policy] if-match extcommunity-filter 1

[*PE2-route-policy] quit

[*PE2] route-policy test deny node 20

[*PE2] commit

对于高级VPN-Target扩展团体属性过滤器：

[~PE2] route-policy test permit node 10

[*PE2-route-policy] if-match extcommunity-filter test

[*PE2-route-policy] quit

[*PE2] route-policy test deny node 20

[*PE2] commit

在PE2上配置BGP路由接收时应用Route-Policy。

[~PE2] bgp 100

[*PE2-bgp] ipv4-family vpnv4

[*PE2-bgp-af-vpnv4] peer 1.1.1.1 route-policy test import

[*PE2-bgp-af-vpnv4] quit

[*PE2-bgp] quit

[*PE2] commit

# 在PE2上执行display bgp vpnv4 all routing-table命令查看BGP VPNv4路由信息，可以看到路由4.4.4.4/32被过滤掉了。

[~PE2] display bgp vpnv4 all routing-table 3.3.3.3

 
 BGP local router ID : 10.1.1.2
 Local AS number : 100
 
 Total routes of Route Distinguisher(1:100): 1
 BGP routing table entry information of 3.3.3.3/32:
 Label information (Received/Applied): 32905/NULL
 From: 1.1.1.1 (1.1.1.1)  
 Route Duration: 0d00h05m41s
 Relay IP Nexthop: 10.1.1.1
 Relay IP Out-Interface: GigabitEthernet0/1/0
 Relay Tunnel Out-Interface: GigabitEthernet0/1/0
 Original nexthop: 1.1.1.1
 Qos information : 0x0            
 Ext-Community: RT <1 : 100>
 AS-path Nil, origin incomplete, MED 0, localpref 100, pref-val 0, valid, internal, best, select, pre 255
 Not advertised to any peer yet
    
 VPN-Instance vpnc, Router ID 10.1.1.2:

 Total Number of Routes: 1
 BGP routing table entry information of 3.3.3.3/32:
 Route Distinguisher: 1:100
 Remote-Cross route
 Label information (Received/Applied): 32905/NULL
 From: 1.1.1.1 (1.1.1.1)  
 Route Duration: 0d00h37m42s
 Relay Tunnel Out-Interface: GigabitEthernet0/1/0
 Original nexthop: 1.1.1.1
 Qos information : 0x0            
 Ext-Community: RT <1 : 100>
 AS-path Nil, origin incomplete, MED 0, localpref 100, pref-val 0, valid, internal, best, select, pre 255
 Not advertised to any peer yet

[~PE2] display bgp vpnv4 all routing-table 4.4.4.4

Info: The network does not exist.

配置文件

PE1的配置文件

#
sysname PE1
#
ip vpn-instance vpna
 ipv4-family
  route-distinguisher 1:100
  vpn-target 1:100 export-extcommunity
  vpn-target 1:100 import-extcommunity
#
ip vpn-instance vpnb
 ipv4-family    
  route-distinguisher 2:100
  vpn-target 2:100 export-extcommunity
  vpn-target 2:100 import-extcommunity
#
mpls lsr-id 1.1.1.1
#
mpls
#
mpls ldp
#
interface GigabitEthernet0/1/0
 undo shutdown
 ip address 10.1.1.1 255.255.255.0
 mpls
 mpls ldp
#
interface LoopBack1
 ip address 1.1.1.1 255.255.255.255
#
bgp 100
 peer 2.2.2.2 as-number 100
 peer 2.2.2.2 connect-interface LoopBack1
 #
 ipv4-family unicast
  undo synchronization
  peer 2.2.2.2 enable
 #
 ipv4-family vpnv4
  policy vpn-target
  peer 2.2.2.2 enable
 #
 ipv4-family vpn-instance vpna
  import-route static
 #
 ipv4-family vpn-instance vpnb
  import-route static
#
ip route-static 2.2.2.2 255.255.255.255 GigabitEthernet0/1/0 10.1.1.2
ip route-static vpn-instance vpna 3.3.3.3 255.255.255.255 NULL0
ip route-static vpn-instance vpnb 4.4.4.4 255.255.255.255 NULL0
#
return

PE2的配置文件

#
sysname PE2
#
ip vpn-instance vpnc
 ipv4-family
  route-distinguisher 1:100
  vpn-target 3:100 export-extcommunity
  vpn-target 1:100 import-extcommunity
  vpn-target 2:100 import-extcommunity
#
mpls lsr-id 2.2.2.2
#
mpls
#
mpls ldp
#
interface GigabitEthernet0/1/0
 undo shutdown
 ip address 10.1.1.2 255.255.255.0
 mpls
 mpls ldp
#
interface LoopBack1
 ip address 2.2.2.2 255.255.255.255
#
bgp 100
 peer 1.1.1.1 as-number 100
 peer 1.1.1.1 connect-interface LoopBack1
 #
 ipv4-family unicast
  undo synchronization
  peer 1.1.1.1 enable
 #
 ipv4-family vpnv4
  policy vpn-target
  peer 1.1.1.1 enable
  peer 1.1.1.1 route-policy test import
#
route-policy test permit node 10
 if-match extcommunity-filter 1
#               
route-policy test deny node 20
#
ip extcommunity-filter 1 index 10 permit rt 1:100
#
ip route-static 1.1.1.1 255.255.255.255 GigabitEthernet0/1/0 10.1.1.1
#
return

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更新时间：2020-02-11

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