--在VPNv4的BGP配置下面啓用了bgp鄰居就會自動 生成一條配置，發送擴展團體屬性！
-----在VPNv4 的bgp配置之前後的對比，自動多了一條 neigbbor x.x.x.x send-community extended
---------------------------------------------------------------------
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2.8 skip to MPLS vpn 3.2
R1:
router bgp 12345
address-family vpnv4
neighbor 123.2.2.2 activate
neighbor 123.3.3.3 activate
neighbor 123.6.6.6 activate
neighbor 123.7.7.7 activate
neighbor iBGP route-reflector-client
R2:
router bgp 12345
address-family vpnv4
neighbor 123.1.1.1 activate
R3:
router bgp 12345
address-family vpnv4
neighbor 123.1.1.1 activate
R6:
router bgp 12345
address-family vpnv4
neighbor 123.1.1.1 activate
R7:
router bgp 12345
address-family vpnv4
neighbor 123.1.1.1 activate
-----------------------------------------------------------------------------
-----------在VPNv4 的bgp配置之前後的對比，自動多了一條 neigbbor x.x.x.x send-community extended
------------------------------------------------------------------------------
2.8 skip to MPLS vpn 3.2
R1:
router bgp 12345
address-family vpnv4
neighbor iBGP route-reflector-client
neigbbor iBGP send-community extended ------在VPNv4的BGP配置下面啓用了bgp鄰居就會自動 生成一條配置，發送擴展團體屬性！
neighbor 123.2.2.2 activate
neighbor 123.3.3.3 activate
neighbor 123.6.6.6 activate
neighbor 123.7.7.7 activate
R2:
router bgp 12345
address-family vpnv4
neighbor 123.1.1.1 activate
neighbor 123.1.1.1 send-community extended -在VPNv4的BGP配置下面啓用了bgp鄰居就會自動 生成一條配置，發送擴展團體屬性！
R3:
router bgp 12345
address-family vpnv4
neighbor 123.1.1.1 activate
neighbor 123.1.1.1 send-community extended -在VPNv4的BGP配置下面啓用了bgp鄰居就會自動 生成一條配置，發送擴展團體屬性！
R6:
router bgp 12345
address-family vpnv4
neighbor 123.1.1.1 activate
neighbor 123.1.1.1 send-community extended -在VPNv4的BGP配置下面啓用了bgp鄰居就會自動 生成一條配置，發送擴展團體屬性！
R7:
router bgp 12345
address-family vpnv4
neighbor 123.1.1.1 activate
neighbor 123.1.1.1 send-community extended -在VPNv4的BGP配置下面啓用了bgp鄰居就會自動 生成一條配置，發送擴展團體屬性！