bgp团体属性和策略

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1、实验：BGP中路由策略的一些应用要求：192.168.20.1/24  COST 101  团体属性值200:100        21.1/24  过滤        22.1/24 COST100   R3的收到的20.1附加一个AS号1000和团体属性100：100AS100过滤AS200的流量不传给AS300(r3没有2.2.2.2)发送BGP更新报文时，可以携带私有自治系统号不携带私有自治系统号(peer192.168.1.2public-as-only) 配置如下：AR1#sysnamer1#interfaceEther

2、net0/0/0ipaddress192.168.1.1255.255.255.252#interfaceEthernet0/0/1ipaddress192.168.1.5255.255.255.252#interfaceLoopBack20ipaddress192.168.20.1255.255.255.0#interfaceLoopBack21ipaddress192.168.21.1255.255.255.0#interfaceLoopBack22ipaddress192.168.22.1255.255.255.0#bgp10

3、0peer192.168.1.2as-number200peer192.168.1.6as-number300#ipv4-familyunicast undosynchronization import-routedirect peer192.168.1.2enable peer192.168.1.6enable peer192.168.1.6route-policyaexport peer192.168.1.2route-policyaexport peer192.168.1.6advertise-community peer19

4、2.168.1.2advertise-community#route-policyapermitnode10if-matchip-prefixaapplycost101applycommunity200:100#route-policyadenynode20if-matchip-prefixb#route-policyapermitnode30if-matchip-prefixcapplycost100#route-policyapermitnode200#ipip-prefixaindex10permit192.168.20.02

5、4greater-equal24less-equal32ipip-prefixbindex10permit192.168.21.024greater-equal24less-equal32ipip-prefixcindex10permit192.168.22.024greater-equal24less-equal32#return  AR2#sysnamer2#interfaceEthernet0/0/0ipaddress192.168.1.2255.255.255.252#interfaceSerial0/0/3link-pro

6、tocolppp#interfaceGigabitEthernet0/0/0#interfaceGigabitEthernet0/0/1#interfaceGigabitEthernet0/0/2#interfaceGigabitEthernet0/0/3#interfaceNULL0#interfaceLoopBack0ipaddress2.2.2.2255.255.255.255#bgp200peer192.168.1.1as-number100#ipv4-familyunicast undosynchronization im

7、port-routedirect peer192.168.1.1enable peer192.168.1.1route-policyaexport#route-policyapermitnode10if-matchcommunity-filter1#ipcommunity-filter1permitno-export#return AR3sysnamer3#interfaceEthernet0/0/0#interfaceEthernet0/0/1ipaddress192.168.1.6255.255.255.252#bgp300pe

8、er192.168.1.5as-number100#ipv4-familyunicast undosynchronization peer192.168.1.5enable peer192.168.1.5route-policyaim