案例精解：bgp路由黑洞

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1、案例精解：BGP路由黑洞什么是路由黑洞？简单的说，它会默默的将数据包丢弃，使所有数据包有去无回，下面来看一个案如图所示：R1和R2建立EBGP邻居关系R2和R5建立IBGP邻居关系R5和R7建立EBGP邻居关系R2、R3、R5之间运行RIPv2首先看配置：sysnameroute-1#routerid1.1.1.1#interfaceEthernet0/0ipaddress192.168.12.1255.255.255.252#interfaceEthernet0/1ipaddressdhcp-alloc#int

2、erfaceLoopBack0ipaddress1.1.1.1255.255.255.255#bgp100undosynchronizationgroup1externalpeer192.168.12.2group1as-number200#iproute-static2.2.2.2255.255.255.255192.168.12.2preference60#sysnameroute-2#routerid2.2.2.2#interfaceEthernet0/0ipaddress192.168.12.2255.2

3、55.255.252#interfaceEthernet0/1ipaddress192.168.23.1255.255.255.252#interfaceLoopBack0ipaddress2.2.2.2255.255.255.255#bgp200undosynchronizationgroup1externalpeer192.168.12.1group1as-number100group2internalpeer192.168.35.2group2#ospf1import-routedirectimport-r

4、outestaticarea0.0.0.0network2.2.2.20.0.0.0network192.168.23.00.0.0.3#iproute-static1.1.1.1255.255.255.255192.168.12.1preference60#sysnameroute-3#routerid3.3.3.3#interfaceEthernet0/0ipaddress192.168.35.1255.255.255.252#interfaceEthernet0/1ipaddress192.168.23.2

5、255.255.255.252#interfaceLoopBack0ipaddress3.3.3.3255.255.255.255#ospf1import-routedirectimport-routestaticarea0.0.0.0network3.3.3.30.0.0.0network192.168.23.00.0.0.3network192.168.35.00.0.0.3#sysnameroute-5#routerid5.5.5.5#interfaceEthernet0/0ipaddress192.168

6、.35.2255.255.255.252#interfaceEthernet0/1ipaddress192.168.57.1255.255.255.252#interfaceLoopBack0ipaddress5.5.5.5255.255.255.255#bgp200undosynchronizationgroup2internalpeer192.168.23.1group2group1externalpeer192.168.57.2group1as-number300#ospf1import-routedire

7、ctimport-routestaticarea0.0.0.0network5.5.5.50.0.0.0network192.168.35.00.0.0.3#iproute-static7.7.7.7255.255.255.255192.168.57.2preference60sysnameroute-7#routerid7.7.7.7#interfaceEthernet0/0ipaddressdhcp-alloc#interfaceEthernet0/1ipaddress192.168.57.2255.255.

8、255.252#interfaceLoopBack0ipaddress7.7.7.7255.255.255.255#bgp300undosynchronizationgroup1externalpeer192.168.57.1group1as-number200#iproute-static1.1.1.1255.255.255.255192.168.57.1prefere