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    VRF Selection using by source ip
    
        
    
          發布: 2007-6-23 19:14 |
作者:   |
來源: 
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查看: 17次 | 進入軟件測試論壇討論
        
    
        
    
        領測軟件測試網
              
                  
                  
                              
                            
                              
                  
    　　 
    

    

    

    使用了這個feature后，就不需要在接口上應用ip vrf forwarding了，pe會根據上來數據包的源地址把數據包劃分到相應的vrf中，當然這樣做帶來了方便，但性能上的下降也相當大。還有一種方法就是用route-map來實現vrf selection，這樣更靈活，甚至可以根據ip precedence來劃分vrf了。不過cisco的ios沒有同時支持使用source ip和route-map做vrf selection的。
    

    VRF Selection using by source ip
    R1 

    hostname R1
    !
    interface Loopback10
    description SiteA
    ip address 172.16.10.1 255.255.255.255
    no ip directed-broadcast
    !
    interface Loopback20
    description SiteB
    ip address 172.16.20.1 255.255.255.255
    no ip directed-broadcast
    !
    interface Ethernet1/2
    ip address 192.168.12.1 255.255.255.0
    no ip directed-broadcast
    full-duplex
    !
    ip route 0.0.0.0 0.0.0.0 192.168.12.2

    R2 

    hostname R2
    !
    ip cef
    ip vrf SiteA
    rd 100:100
    route-target export 100:100
    route-target import 100:100
    !         
    ip vrf SiteB
    rd 100:200
    route-target export 100:200
    route-target import 100:200
    !
    mpls label protocol ldp
    vrf selection source 172.16.10.0 255.255.255.0 vrf SiteA
    vrf selection source 172.16.20.0 255.255.255.0 vrf SiteB
    !
    interface Loopback0
    ip address 2.2.2.2 255.255.255.255
    no ip directed-broadcast
    !
    interface Ethernet1/1
    ip vrf select source
    ip vrf receive SiteA
    ip vrf receive SiteB
    ip address 192.168.12.2 255.255.255.0
    no ip directed-broadcast
    full-duplex
    !
    interface Ethernet1/3
    ip address 192.168.23.2 255.255.255.0
    no ip directed-broadcast
    full-duplex
    tag-switching ip
    !         
    router ospf 100
    router-id 2.2.2.2
    log-adjacency-changes
    network 2.2.2.2 0.0.0.0 area 0
    network 192.168.23.0 0.0.0.255 area 0
    !
    router bgp 100
    no synchronization
    bgp router-id 2.2.2.2
    bgp log-neighbor-changes
    neighbor 4.4.4.4 remote-as 100
    neighbor 4.4.4.4 update-source Loopback0
    no auto-summary
    !
    address-family vpnv4
    neighbor 4.4.4.4 activate
    neighbor 4.4.4.4 send-community both
    exit-address-family
    !
    address-family ipv4 vrf SiteB
    redistribute static
    no synchronization
    exit-address-family
    !
    address-family ipv4 vrf SiteA
    redistribute static
    no synchronization
    exit-address-family
    !
    ip route vrf SiteA 172.16.10.1 255.255.255.255 192.168.12.1
    ip route vrf SiteB 172.16.20.1 255.255.255.255 192.168.12.1
    !
    tag-switching tdp router-id Loopback0

    R3 

    hostname R3
    !
    ip cef
    mpls label protocol ldp
    !
    interface Loopback0
    ip address 3.3.3.3 255.255.255.255
    no ip directed-broadcast
    !
    interface Ethernet1/2
    ip address 192.168.23.3 255.255.255.0
    no ip directed-broadcast
    full-duplex
    tag-switching ip
    !
    interface Ethernet1/4
    ip address 192.168.34.3 255.255.255.0
    no ip directed-broadcast
    full-duplex
    tag-switching ip
    !
    router ospf 100
    router-id 3.3.3.3
    log-adjacency-changes
    network 3.3.3.3 0.0.0.0 area 0
    network 192.168.23.0 0.0.0.255 area 0
    network 192.168.34.0 0.0.0.255 area 0
    !
    tag-switching tdp router-id Loopback0

    R4 

    hostname R4
    !
    ip cef
    ip vrf SiteA
    rd 100:100
    route-target export 100:100
    route-target import 100:100
    !         
    ip vrf SiteB
    rd 100:200
    route-target export 100:200
    route-target import 100:200
    !
    mpls label protocol ldp
    vrf selection source 172.16.10.0 255.255.255.0 vrf SiteA
    vrf selection source 172.16.20.0 255.255.255.0 vrf SiteB
    !
    interface Loopback0
    ip address 4.4.4.4 255.255.255.255
    no ip directed-broadcast
    !
    interface Ethernet1/3
    ip address 192.168.34.4 255.255.255.0
    no ip directed-broadcast
    full-duplex
    tag-switching ip
    !
    interface Ethernet1/5
    ip vrf select source
    ip vrf receive SiteA
    ip vrf receive SiteB
    ip address 192.168.45.4 255.255.255.0
    no ip directed-broadcast
    full-duplex
    !
    router ospf 100
    router-id 4.4.4.4
    log-adjacency-changes
    network 4.4.4.4 0.0.0.0 area 0
    network 192.168.34.0 0.0.0.255 area 0
    !
    router bgp 100
    no synchronization
    bgp router-id 4.4.4.4
    bgp log-neighbor-changes
    neighbor 2.2.2.2 remote-as 100
    neighbor 2.2.2.2 update-source Loopback0
    no auto-summary
    !
    address-family vpnv4
    neighbor 2.2.2.2 activate
    neighbor 2.2.2.2 send-community both
    exit-address-family
    !
    address-family ipv4 vrf SiteB
    redistribute static
    no synchronization
    exit-address-family
    !
    address-family ipv4 vrf SiteA
    redistribute static
    no synchronization
    exit-address-family
    !
    ip route vrf SiteA 172.16.10.5 255.255.255.255 192.168.45.5
    ip route vrf SiteB 172.16.20.5 255.255.255.255 192.168.45.5
    !
    tag-switching tdp router-id Loopback0

    R5 

    hostname R5
    !
    interface Loopback10
    description SiteA
    ip address 172.16.10.5 255.255.255.255
    no ip directed-broadcast
    !
    interface Loopback20
    description SiteB
    ip address 172.16.20.5 255.255.255.255
    no ip directed-broadcast
    !
    interface Ethernet1/4
    ip address 192.168.45.5 255.255.255.0
    no ip directed-broadcast
    full-duplex
    !         
    ip route 0.0.0.0 0.0.0.0 192.168.45.4
     
                 
               
                
            
            
    
            
    
              
    
                  
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