BGP团体属性配置
AR1：#interface Ethernet0/0/0
ip address 192.168.1.1 255.255.255.0
#
interface Ethernet0/0/1
ip address 192.168.2.1 255.255.255.0
#
bgp 100
router-id 1.1.1.1
peer 192.168.2.2 as-number 200
#
ipv4-family unicast
undo synchronization
network 192.168.1.0
peer 192.168.2.2 enable
#
AR3:#
interface Ethernet0/0/0
ip address 192.168.2.2 255.255.255.0
#
interface Ethernet0/0/1
ip address 192.168.3.1 255.255.255.0
#
#
bgp 200
router-id 2.2.2.2
peer 192.168.2.1 as-number 100
peer 192.168.3.2 as-number 300
#
ipv4-family unicast
undo synchronization
network 192.168.2.0
network 192.168.3.0
peer 192.168.2.1 enable
peer 192.168.3.2 enable
AR4interface Ethernet0/0/0
ip address 192.168.3.2 255.255.255.0
#
bgp 300
router-id 3.3.3.3
peer 192.168.3.1 as-number 200
#
ipv4-family unicast
undo synchronization
peer 192.168.3.1 enable
#
这样bgp就建立起来了dis bgp routing-table192.168.1.1 BGP local router ID : 2.2.2.2
Local AS number : 200
Paths: 1 available, 1 best, 1 select
BGP routing table entry information of 192.168.1.0/24:
From: 192.168.2.1 (1.1.1.1)
Route Duration: 00h14m16s
Direct Out-interface: Ethernet0/0/0
Original nexthop: 192.168.2.1
Qos information : 0x0
AS-path 100, origin igp, MED 0, pref-val 0, valid, external, best, select, acti
ve, pre 255
Advertised to such 2 peers:
192.168.2.1
192.168.3.2看到AR3把学到的bgp传递给AR1AR4 了现在要做的是：AR3阻止从AR1学习到的BGP发布到AR4.
AR1：#
route-policy 1 permit node 10
apply community no-export#bgp 100peer 192.168.2.2 route-policy 1 export
peer 192.168.2.2 advertise-community
#再查看AR4dis bgp rou
dis bgp routing-table BGP Local router ID is 3.3.3.3
Status codes: * - valid, > - best, d - damped,
h - history,i - internal, s - suppressed, S - Stale
Origin : i - IGP, e - EGP, ? - incomplete
Total Number of Routes: 2
Network NextHop MED LocPrf PrefVal Path/Ogn *> 192.168.2.0 192.168.3.1 0 0 200i
192.168.3.0 192.168.3.1 0 0 200i
就没有到AR1的bgp了
.其实我是一个天才，可惜天妒英才！ 穿别人的鞋，走自己的路，让他们找去吧。 解释就是掩饰，掩饰就是编故事! 男人靠的住，母猪能上树! 走自己的路，让别人打车去吧。 人生重要的不是所站的位置，而是所朝的方向!
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